10 Best Interior Design Companies in Toronto for Whole-Home Projects, Renovations and Condos

The most expensive thing an interior designer can hand you is a drawing that cannot be built.

It happens constantly, and it rarely looks like a failure at the time. The renderings are beautiful. The client approves them. Then the contractor arrives, discovers that the island position blocks the only route for the new plumbing, that the recessed lighting plan runs through a floor joist, or that the cabinetry depth leaves eleven inches of walkway on the fridge side. Everything gets adjusted on site by people who are solving a construction problem rather than protecting a design, and the finished room ends up an approximate translation of the thing that was sold.

This is why hiring an interior designer in Toronto is less about matching a style than most homeowners assume. The portfolios are all good. Everyone can put together a palette. The real differences sit in the boring parts: what the deliverable actually is, whether it contains dimensions and specifications a trade can build from, how the fee is structured and what that structure quietly incentivises, and who is responsible when the drawing and the building disagree.

Toronto layers its own constraints on top. A condo in the core comes with a board, a property manager, restricted working hours, elevator bookings, a damage deposit and a list of things that cannot be touched — the risers, the slab, anything on the exterior. A century house in Riverdale or the Annex comes with walls that are not square, ceilings that are not level and a structure that will not politely accept a new opening. A Leaside bungalow comes with a service panel that cannot support the lighting plan. A designer who works around those realities produces a different and better set of drawings than one who discovers them after approval.

The list below covers the whole range the city offers: internationally published studios working on estates, full-service firms handling entire homes, credentialled boutique practices, and integrated companies where the designer and the builder work for the same business. True Form Construction takes the number-one position for a structural reason rather than a stylistic one: the person who specifies the tile is the person who has to make it fit, and the design fee works against the same contract that delivers the build.

Ratings, fees and review counts reflect public information available when this article was prepared and may change over time.

Best Interior Design Companies in Toronto

1. True Form Construction

Interior design and construction are usually two businesses with two contracts, two sets of incentives and one shared gap between them. Almost everything that goes wrong on a Toronto renovation lives in that gap.

Eric Kotlyar built True Form around closing it. An engineer who came to Canada from Ukraine in 2001, he spent more than a decade on Toronto construction sites before founding the company in 2011, and what he watched happen repeatedly was not incompetence but disconnection: designers drawing details that could not be built, builders quietly modifying plans without telling the designer, and homeowners in the middle paying for every miscommunication. His conclusion was that a renovation is a system, and that systems fail at their interfaces rather than at their components.

That is why True Form is our top overall choice for interior design in Toronto, and it is worth being precise about the claim. This is not the most decorated studio on this page, and it is not the one whose work appears most often in magazines. It is the one where the design and the build sit inside the same company — so the person who specified the tile is the person who has to make it fit, and there is no interface for the project to fall through.

The firm operates from 305 Lesmill Road in North York, has completed more than 450 projects across fifteen-plus years in the GTA, and covers Toronto and Etobicoke along with North York, Scarborough, Markham, Richmond Hill, Vaughan, Mississauga, Oakville-adjacent Halton, Burlington, Milton, Brampton, Aurora, Newmarket, King City, Stouffville, Ajax, Whitby, Oshawa, Caledon, Hamilton and Georgina.

Services offered by True Form Construction

• Measured survey of the existing space
• Space planning and priced layout options
• Measured plans, layouts and elevations
• Millwork details and specification
• Electrical and lighting layouts
• Finish schedule and selections list
• 3D views and renderings
• Full package, single-room and integrated design-build options
• Permit drawings and approvals
• Construction of the completed design

Why choose True Form Construction for interior design in Toronto?

Because the drawings are produced by people who then have to build them, and because the fee structure reflects that.

The deliverable list is the place to start, and it is unusually complete: measured plans, layouts, elevations, millwork details, electrical and lighting layouts, a finish schedule and a selections list, with 3D views. Note what is in there that many design packages lack — elevations, millwork details and a selections list specified to the item. Millwork, tile, lighting and hardware are named as products, not described as intentions. That is the difference between a concept package and a set a trade can actually build from.

The measured survey matters more than it sounds. True Form measures the existing space so that the drawings match the house rather than an idealised version of it — which in Toronto, where walls are rarely square and ceilings rarely level, is the difference between a millwork run that fits and one that needs scribing and filler panels on site.

Layout options are priced for feasibility before you choose between them. This is the single most useful thing a designer can do and very few do it. The standard experience is falling for the option that turns out to be three times the budget, then redesigning. Pricing the alternatives up front means the decision is made with the cost attached.

The commercial structure is equally deliberate. Design is quoted as a fixed fee against a defined deliverable rather than by the hour with an open end — which removes the anxiety of a revision round costing money — and where True Form builds what it drew, the design fee works against one construction contract. The build itself runs on a fixed-price contract with scope, allowances and exclusions written down before demolition, backed by a five-year workmanship warranty.

Typical design turnaround is three to six weeks for most homes, depending on how quickly selections are settled. The company also runs a standing offer of a complimentary 3D design package with every booked consultation.

The honest limitation is scope of ambition. If you want a studio whose work will appear in Architectural Digest, or a designer with a strongly authored personal aesthetic, the firms further down this list are built for that and True Form is not. What it offers is a design that gets built accurately, on a price agreed in advance, by one accountable company.

Reviews and ratings

True Form holds a 5-star verified rating on Google across 44 reviews and reports that 98% of its feedback is positive.

That is a moderate volume rather than a large one, which is what you would expect from a company completing substantial multi-month projects rather than high-turnover room refreshes. The consistent themes are the ones the business model predicts: prices that held from contract to completion, and communication that did not require chasing — clients are given direct cell numbers and can reach the team by text or email rather than through an office.

For a design-and-build engagement, the most useful verification is to ask to see a completed set of drawings from a past project alongside photographs of the finished room. Comparing the two tells you immediately how faithfully this company builds what it draws, which is the entire proposition.

Contacts

• Email: Use the website contact form
• Phone: 416-854-1064
• Website: trueformreno.com
• Address: 305 Lesmill Road, North York, ON M3B 2V1

2. Anne Hepfer Designs

There is a category of interior that photographs beautifully and feels like nothing to stand in. Anne Hepfer’s work is the opposite, and the reason is that she designs for mood before she designs for style.

Hepfer founded her practice in 2003 in Manhattan after working for Daniel Romualdez, and relocated to Toronto in 2004. She is internationally known for her handling of palette and colour across both traditional and contemporary houses, her projects run throughout Canada and the United States, and she is the author of MOOD: Interiors & Inspiration — a monograph that is itself a useful indication of what she is interested in. The studio operates from 164 Bentworth Avenue in Toronto.

What distinguishes the work is restraint deployed deliberately: layered neutrals with one decisive move, natural materials allowed to be imperfect, and rooms that read as accumulated rather than installed.

Services offered by Anne Hepfer Designs

• Full-service residential interior design
• City house and country property projects
• New construction interior design
• Renovation design
• Custom furnishing and material specification
• Collaboration with architects and builders
• Project management through completion

Why choose Anne Hepfer Designs for interior design in Toronto?

For a house that needs to hold up over decades rather than over a photography session.

Colour is the technical skill most often claimed and least often demonstrated. Getting it right in Toronto is genuinely difficult, because the light here is cool and weak for five months of the year and warm and strong for four, and a palette chosen from swatches in July frequently reads grey and flat in January. A designer whose reputation is built specifically on colour and palette is solving a real problem, not an aesthetic preference.

The city-and-country range is also relevant to a specific Toronto client. A great many households here own both a Toronto house and a property in Muskoka, Prince Edward County or the Kawarthas, and the two require genuinely different approaches — different light, different materials, different tolerance for wear. A studio that works in both registers can handle the pair coherently.

The studio’s enquiry process asks for the architect, the builder, the budget and the timing up front, which signals how it prefers to work: as part of a team assembled early, rather than as a decorator brought in after construction decisions are already fixed.

The limitation is straightforward. This is a high-end practice with an international project list and a published body of work. It is not set up for a single-room refresh or a modest budget, and the enquiry form makes that clear by asking for the budget before anything else.

Reviews and ratings

Anne Hepfer’s standing rests on publication and peer recognition rather than on a large volume of platform reviews — her work appears across US and Canadian design media, she maintains a Houzz professional profile, and the monograph is a form of validation that a star rating cannot substitute for.

That is typical at this level of the market, where work arrives through architects, past clients and press rather than through search. For verification, ask to speak with an architect or builder the studio has worked with recently. On a project of this scale, how a designer behaves inside a project team is more predictive than how a finished room photographs.

Contacts

• Email: Use the website contact form
• Phone: 416-800-2485
• Website: annehepfer.com
• Address: 164 Bentworth Avenue, Unit A, Toronto, ON M6A 1P7

3. Ali Budd Interiors

Furnishing an entire house at once is a logistics problem disguised as a taste problem.

Forty pieces of furniture with forty different lead times, custom upholstery in fabrics that go out of stock, rugs shipping from overseas, art that needs framing, lighting that has to be ordered before the electrician closes the ceiling, and a delivery date that has to align with a family actually moving in. Doing it well requires a studio with project managers, not just designers — and that is precisely how Ali Budd Interiors is built.

Founded in 2010 and operating from a 2,300-square-foot converted warehouse in Toronto’s Castlefield Design District, the studio describes its team as artists, business women, project managers and interior stylists. Its work has been published in Vogue, ELLE Decor, Architectural Digest, House & Home and Domino, and Budd hosts the design series House of Ali on Hulu in the US and HGTV Canada.

Services offered by Ali Budd Interiors

• Whole-home interior design
• Renovation and new-build interior design
• Furniture, art and accessory procurement
• Custom furnishing design
• Styling and installation
• Project management
• Retail shop and product collections

Why choose Ali Budd Interiors for interior design in Toronto?

Because the studio is staffed for execution, not only for design.

Being located in the Castlefield Design District is a practical advantage rather than an address. Castlefield is Toronto’s concentration of showrooms, fabric houses, tile suppliers, lighting dealers and workrooms, which means sourcing, sampling and dealing with a supplier problem happen within a few blocks rather than across the city. On a project with dozens of specified items, that proximity compounds.

The explicit inclusion of project managers in the team description matters. A great deal of interior design frustration comes from studios that are excellent at concept and thin on follow-through: the scheme is approved, and then delivery dates slip, items arrive damaged, and nobody is chasing. A studio that names project management as a discipline is telling you where it invests.

The publication record across Vogue, Architectural Digest and House & Home indicates work that holds up to close scrutiny, and the television series indicates a practice comfortable being watched at work. Clients have included professional athletes and business leaders on multi-million-dollar projects across North America, so the studio is accustomed to complex schedules and demanding briefs.

The obvious caveat is positioning: this is a luxe residential studio working at the upper end, and it is not the right approach for a modest single-room brief.

Reviews and ratings

Ali Budd Interiors is validated primarily by its publication record and broadcast work rather than by review platforms — Vogue, ELLE Decor, Architectural Digest, House & Home and Domino, plus a series on Hulu and HGTV Canada.

Editorial features are a meaningful signal in this field because magazines at that level send their own photographers and will not publish work that does not hold up in person. Public review volume, by contrast, is thin across almost every studio in this tier. For verification, ask for two references from whole-home projects completed in the past two years, and ask them specifically about the procurement and installation phase rather than the design phase.

Contacts

• Email: hello@alibuddinteriors.com
• Phone: Enquire via the studio contact form
• Website: alibuddinteriors.com
• Address: Castlefield Design District, Toronto, ON

4. Laura Stein Interiors

Most interior design engagements end with a handover: here are the drawings, here is the furniture list, good luck.

Laura Stein Interiors ends with an installed house. The studio describes its offering as turn-key decorating, design and project management, and that last word is what separates it from a firm that specifies beautifully and leaves the client to coordinate twelve suppliers.

Established in 2006 and now approaching twenty years of practice from a base in central Toronto, the firm specialises in ground-up construction, full-scale renovations and whole-home furniture and decor for private luxury residences, including cottages and vacation homes, working with clients throughout Canada and the United States. It was named among the Top 100 Architects & Designers of the World by the 2023 Luxury Lifestyle Awards and Best Luxury Interior Design Studio in Ontario for 2023, 2024 and 2025, with a Leaders in Luxury award for Best Residential Interior Design Studio in Ontario in 2025.

Services offered by Laura Stein Interiors

• Whole-home furniture and decor
• Ground-up construction interior design
• Large-scale renovation design
• Custom furnishings and millwork specification
• Layered material and finish schemes
• Cottage and vacation home design
• Turn-key project management and installation
• To-the-trade services

Why choose Laura Stein Interiors for interior design in Toronto?

For clients who want to make decisions and then stop thinking about them.

Turn-key delivery in this field means the studio carries procurement, scheduling, receiving, inspection and installation. The value is not convenience for its own sake — it is that a single party is accountable for the end state. When a sofa arrives in the wrong fabric, a turn-key studio resolves it with the vendor; a design-only arrangement leaves that conversation to the homeowner, who has no leverage and no trade relationship.

The studio’s stated focus on wellness alongside artistry and functionality is more substantive than it first sounds. It shows up as attention to light, acoustics, air, circulation and the way a room supports the routines of the people using it — considerations that tend to get overlooked when a scheme is developed primarily for how it will photograph.

The award record is dense and, importantly, recent: Ontario studio-of-the-year recognition in three consecutive years is a more useful signal than a single historic award, because it indicates current output rather than past reputation.

The cottage and vacation property capability serves the same dual-property Toronto client described earlier, and the to-the-trade offering means the studio also works with other designers and builders.

The limitation is the market position. This is private luxury residential work with custom furnishings and layered materials, and the fee and furnishing budgets reflect that.

Reviews and ratings

The firm’s public record is built on industry awards and press rather than platform ratings: Luxury Lifestyle Awards recognition in 2023 for both the global Top 100 list and Best Luxury Interior Design Studio in Ontario, repeated Ontario studio awards through 2024 and 2025, an International Design & Architecture Award in 2016, and features in House Beautiful, Homes & Gardens and Real Homes.

Editorial coverage and juried awards are the currency at this level, and Laura Stein Interiors has accumulated an unusual amount of both over a short recent period. For a turn-key engagement specifically, ask references about the installation week — that is where turn-key either delivers or does not.

Contacts

• Email: info@laurasteininteriors.com
• Phone: 416-659-2504
• Website: laurasteininteriors.com
• Address: Central Toronto, ON

5. Montana Labelle Design

The hardest interiors to design are the quiet ones, because there is nothing to hide behind.

A room built from bold colour and pattern forgives a great deal. A room built from plaster, oak, stone and linen forgives nothing — every proportion, every reveal, every junction between two materials is visible, and the whole thing either resolves or it does not. Montana Labelle has built her reputation on exactly that kind of work, and the understated detailing is the point rather than an absence of ideas.

Labelle launched her namesake studio in 2013 following a degree in interior design from Parsons. The Toronto business runs in two halves: a full-service residential and commercial interior design studio, and a lifestyle shop offering custom furnishings, curated art, hardware, ceramics, lighting and vintage pieces sourced from vendors and artisans around the world.

Services offered by Montana Labelle Design

• Full-service residential interior design
• Commercial interior design
• Custom furniture design
• Art, ceramics and lighting curation
• Hardware specification and sourcing
• Vintage and one-off piece sourcing
• Lifestyle shop and product line

Why choose Montana Labelle Design for interior design in Toronto?

Because the sourcing operation and the design studio are the same business, and that changes what ends up in the house.

Most interior designers specify from the same set of accessible North American suppliers, which is why a great many well-executed Toronto interiors quietly resemble each other. A studio that maintains its own shop, relationships with artisans and a vintage sourcing habit is drawing from a genuinely different and much wider pool. The result is rooms that contain pieces you will not see in the next house, which is most of what people are actually paying a designer for.

Hardware deserves a specific mention because it is the item homeowners most consistently under-invest in and most consistently touch. Cabinet pulls, door handles, tap ware and hinges are the interface between a person and a room, and the difference between specified hardware and builder-grade hardware is felt daily for twenty years. A studio that curates hardware as a category rather than picking it from a catalogue at the end is paying attention to the right thing.

The enquiry process is notably concrete — the studio asks for property address, square footage, start and end dates, estimated budget inclusive of design fees, and scope of work. Asking for a budget inclusive of fees is a small honesty that saves both parties a wasted meeting.

The limitation is that a restrained, material-led aesthetic is a strong authorial position. If you want maximalist colour or a high-contrast traditional scheme, another studio here is the better fit.

Reviews and ratings

Montana Labelle Design is validated through design press and peer recognition rather than through platform reviews. Her work has been profiled internationally for its understated detailing and its balance of elegance and comfort, and the studio is represented on trade-facing design platforms alongside other established firms.

As with most studios at this level, public review volume is limited. The more informative approach is to visit the lifestyle shop before committing — the pieces a studio chooses to stock with its own money are a direct and unfiltered statement of its taste.

Contacts

• Email: tyler@montanalabelle.com (media and partnerships); project enquiries via the studio form
• Phone: Enquire via the studio contact form
• Website: montanalabelledesign.com
• Address: Toronto, ON

6. Senso Design

In most Toronto homes the interior design either succeeds or fails at the cabinetry, because that is where the majority of the budget and almost all of the storage lives.

The constraint is that standard cabinet modules come in fixed widths and Toronto houses do not. The designer specifies a beautiful kitchen, the stock boxes arrive, and the gaps get closed with filler panels, the awkward corner gets a carousel that wastes a third of its volume, and the ceiling height that could have carried full-height storage gets a bulkhead instead. None of it is a mistake exactly. All of it is a compromise imposed by a supply chain rather than chosen by a designer.

Senso Design removes the constraint by manufacturing its own millwork. Established in 2004 with more than twenty years in the business, the company operates from 250 Shields Court in Markham and builds custom cabinetry and furniture in its own facility on German and Italian machinery, running designers, carpenters, cabinetmakers, tile, electrical and plumbing as a single in-house team. It also produces the SENSO kitchen furniture line, built around ergonomic design and Italian-influenced aesthetics.

Services offered by Senso Design

• In-house interior design
• Kitchen design and renovation
• Bathroom design and renovation
• Custom cabinetry and furniture manufacture
• Condo and whole-home design
• Basement design and additions
• Commercial, office, showroom, restaurant and med spa interiors
• Construction of the completed design

Why choose Senso Design for interior design in Toronto?

Because a designer with a cabinet shop can draw whatever the room needs.

When the millwork is manufactured by the same company doing the design, cabinetry stops being a set of available sizes and becomes a design variable. Full-height runs, non-standard widths, an island proportioned to the actual room, integrated appliance panels and a bank of storage built around an awkward structural post all become ordinary decisions rather than expensive upgrades. For older Toronto houses with irregular geometry, that is the difference between a design that fits and a design that is fitted.

It also removes the most common failure in the middle of a kitchen project, which is the site standing idle waiting on a cabinet delivery from a third party. When the shop belongs to the company running the schedule, that dependency disappears.

The commercial commitment is unusually plain: Senso states that the price signed on day one is the price paid on completion day. Given that the gap between quote and final invoice is the most consistent complaint in this industry, a checkable promise of that kind is worth more than a page of reassurance.

The single in-house team covers design, permitting and construction, which means the drawings never need re-explaining to a separate builder.

The limitation is emphasis. Senso is strongest where cabinetry and interior architecture carry the project. If what you want is a furnishing and decorating scheme for an existing space, the decorating-led studios elsewhere in this ranking are a closer match.

Reviews and ratings

Senso Design holds 4.9 stars on Google from more than 115 verified reviews, has won the HomeStars Best of Award every year from 2022 through 2026, and has taken Best of Houzz in 2022, 2025 and 2026. Sustained recognition across two independent platforms over several consecutive years is among the strongest public records in this ranking.

Feedback most often describes the design stage and the quality of the cabinetry, which matches where the company’s capability sits. Every project carries a written workmanship warranty. Where criticism appears, it relates to lead times on custom millwork — an unavoidable consequence of building rather than buying, and worth planning the schedule around.

Contacts

• Email: info@sensodesign.ca
• Phone: 416-900-3675
• Website: sensodesign.ca
• Address: 250 Shields Court, Unit 9, Markham, ON L3R 9W7

7. Jane Lockhart Design

Not everyone needs a whole house designed. A great many Toronto homeowners need one room resolved — usually the kitchen, usually because they have been circling the same decision for eight months.

Jane Lockhart Design is one of the few established studios in this market that will take that work seriously. Alongside custom homes and full renovations, the firm handles room makeovers and individual kitchen, bathroom, bedroom and dining room projects, which makes it an accessible entry point to professional design for homeowners who are not undertaking a whole-home programme.

Jane Lockhart holds a BAAID and is NCIDQ certified, and has been practising since 1997. She is a two-time winner of the NKBA Pinnacle Award — the National Kitchen & Bath Association’s recognition, which is directly relevant given how much of this studio’s work is kitchens and bathrooms — and has a long broadcast and publishing record across HGTV, Breakfast Television, The Marilyn Denis Show, The Globe and Mail, the Toronto Star and Canadian Living. The firm also produces its own furniture lines. Its office is at The International Centre on Airport Road in Mississauga, serving Toronto and the wider region.

Services offered by Jane Lockhart Design

• Residential interior design
• Kitchen design
• Bathroom design
• Bedroom and dining room design
• Single-room makeovers
• Custom home and renovation design
• Colour consultation
• Model homes, presentation centres and special projects

Why choose Jane Lockhart Design for interior design in Toronto?

Kitchen and bathroom credentials, and a genuine willingness to take on a single room.

The NKBA Pinnacle Award is worth understanding rather than skimming past. It is judged specifically on kitchen and bath design by an association devoted to those rooms, which means it assesses the things that actually determine whether a kitchen works — work triangle and circulation, storage strategy, appliance integration, lighting layers, ventilation, and how the cabinetry resolves against the architecture. Two of them is a specific, verifiable competence rather than a general claim of excellence.

Colour is the studio’s other recognised strength, and in Toronto that is a practical rather than decorative skill. North-facing rooms here receive cool light for most of the year; a paint choice that reads warm on a chip can turn grey and lifeless on a wall. Designers with a track record in colour specification are solving for that condition rather than guessing at it.

The single-room option genuinely matters. Many established studios have minimum project sizes that exclude anyone not renovating an entire house, which leaves homeowners with one difficult room choosing between doing it themselves and not doing it. A firm of this standing accepting room-level work is a useful thing to know.

The geographic note, stated plainly: the office is in Mississauga rather than in Toronto, and the practice works across North America. It serves Toronto readily but is not a Toronto-based studio.

Reviews and ratings

Jane Lockhart’s record is built on nearly three decades of practice, formal credentials — BAAID and NCIDQ certification — and two NKBA Pinnacle Awards, supported by sustained national media presence across television, newspapers and magazines.

The NCIDQ certification is worth weighing. It is a North American examination covering building systems, codes, construction standards and professional practice rather than aesthetics, and it is a meaningful differentiator in a field where anyone may describe themselves as an interior designer. For a kitchen or bathroom project involving plumbing, ventilation and electrical changes, that technical grounding is directly useful.

Contacts

• Email: Use the website contact form
• Phone: 416-762-2493
• Website: janelockhart.com
• Address: The International Centre, 6900 Airport Road, Suite 200, Box 76, Mississauga, ON L4V 1E8

8. Delo Interiors

In Ontario, the title “Registered Interior Designer” is protected and belongs to members of ARIDO. The words “interior designer” and “interior decorator,” on their own, are not restricted in the same way — anyone may use them.

That is not an argument that credentialled designers are always better; plenty of excellent designers are uncertified, and a certificate has never made anyone’s eye for proportion any sharper. But it does mean that credentials are one of the few objectively checkable facts available to a homeowner in a field where almost everything else is portfolio and persuasion, and it is worth knowing which firms have them.

Delo Interiors is led by founder and creative director Dianne, who holds a Bachelor’s degree in Interior Design, is NCIDQ certified, and is a professional member of both ARIDO and the Interior Designers of Canada. She has over sixteen years in refined residential design, and her work has been published in House & Home and House & Garden USA.

Services offered by Delo Interiors

• Full-home renovation design
• Residential interior design
• Custom cottage design
• Vacation property design
• Space planning and architectural flow
• Material, texture and colour specification
• Concept-to-completion design oversight

Why choose Delo Interiors for interior design in Toronto?

Verified credentials combined with direct access to the principal.

The NCIDQ examination covers building systems, codes, construction documents and professional practice rather than taste, and passing it demonstrates that a designer understands what happens behind the finishes. ARIDO membership requires education, experience and examination, and carries a professional accountability framework. On a project involving structural changes, relocated plumbing or a reworked electrical layout, that technical grounding is not decorative.

The practice’s stated philosophy is design for how people live rather than for trends, with decisions made from architectural flow down to the smallest detail. That priority — flow first, then detail — is the correct order and it is the opposite of how a great deal of residential design proceeds, where a mood board arrives before anyone has interrogated why the house does not work.

A boutique studio also means the person you meet is the person doing the work. In larger firms the principal wins the project and a junior designer executes it, which is not inherently a problem but is frequently not what the client expected. Here, the founder’s involvement is the offering.

The cottage and vacation property capability rounds it out for the dual-property Toronto household.

The limitation is capacity. A boutique practice led by one principal cannot run many large projects concurrently, so expect a waiting list, and the studio is not the right fit for a whole-house programme requiring several parallel project managers.

Reviews and ratings

Delo Interiors is verified primarily through professional credentials and publication rather than through review volume: NCIDQ certification, ARIDO and IDC membership, a Bachelor’s degree in Interior Design, and features in House & Home and House & Garden USA.

For a boutique studio, that combination is a stronger signal than a modest number of platform reviews would be — credentials are verifiable against the issuing body, and editorial features at that level involve independent photography. If you are shortlisting the firm, ask to see a full design package from a completed project so you can judge the depth of the documentation rather than only the finished photographs.

Contacts

• Email: dianne@delointeriors.com
• Phone: 647-492-2024
• Website: delointeriors.com
• Address: Toronto, ON

9. Mason Studio

Most residential interior design is, reasonably enough, about comfort and taste. A smaller amount of it is about ideas, and Mason Studio sits firmly in the second category.

Co-founded by Ashley Rumsey, its executive director, and Stanley Sun, its creative director, the practice describes itself as a design firm and cultural engine, with work grounded in human behaviour, sensory awareness and cultural fluency. It operates from 91 Pelham Avenue in Toronto and runs a Cultural Hub it treats as a living laboratory, alongside an in-house art consultancy.

Its portfolio spans hotels including the Kimpton Saint George and Kimpton Banneker, multi-unit residential projects, restaurants and bars such as Lady Bird Bar and Alobar Downtown, retail and wellness spaces, and cultural installations. It holds multiple ARIDO Awards of Merit and Excellence, Gold in Residential Interior Design at the IDA awards, Gold in Retail Design from Canadian Interiors, a Core77 Notable Built Environment citation and a World Interiors News Bronze, and it is a Certified B Corporation.

Services offered by Mason Studio

• Interior design and interior architecture
• Residential development interiors
• Hospitality and hotel design
• Restaurant and bar design
• Retail and wellness interiors
• Art consultancy and curation
• Cultural installations and exhibitions

Why choose Mason Studio for interior design in Toronto?

Hospitality-grade thinking applied to a home, and an art programme that is part of the design rather than an afterthought.

Hotel and restaurant design solves problems residential design usually ignores: how a room performs under heavy use, how lighting changes across a day and an evening, how materials survive contact, how a sequence of spaces feels as you move through it. Those disciplines translate well to a house that is actually lived in hard — by a family, by people who cook and entertain — and they produce a different kind of durability from a scheme composed primarily for stillness.

The in-house art consultancy is a genuine differentiator. Art is where most otherwise well-designed Toronto interiors quietly fall apart, filled at the last minute with whatever is available at the right size. A studio that curates art as part of the design process, and maintains a cultural programme to stay connected to working artists, approaches it as a design decision rather than a shopping trip.

B Corporation certification is an independently audited standard covering environmental and social performance. It is rare in interior design and a meaningful filter for clients who care how a practice operates as well as what it produces.

The honest limitation, and it is an important one for this list: Mason Studio’s residential work is weighted towards development and multi-unit projects rather than single private houses. Its ARIDO and IDA recognition is genuine, but a homeowner looking for a decorator to furnish a family home will find a closer fit among the residential studios above.

Reviews and ratings

Mason Studio has one of the strongest juried award records on this list — multiple ARIDO Awards of Merit and Excellence, IDA Gold in Residential Interior Design, Canadian Interiors Gold in Retail Design, a Core77 citation and a World Interiors News Bronze.

ARIDO awards are judged by registered interior designers against submitted documentation and built results, which makes them a peer assessment of technical and conceptual quality rather than a popularity measure. Combined with B Corp certification, the verifiable record here is unusually deep, even though public consumer reviews are minimal. For a residential enquiry, ask specifically which private homes the studio has completed recently and who led them.

Contacts

• Email: newbusiness@masonstudio.com
• Phone: 416-761-9736
• Website: masonstudio.com
• Address: 91 Pelham Avenue, Toronto, ON M6N 1A5

10. Ferris Rafauli

At the very top of this market the distinction between architect, interior designer, builder and furniture maker stops being useful, because the whole point is that one person controls all of it.

Ferris Rafauli works that way deliberately. He designs the exterior elevations, the interiors, the landscaping and the furniture for each dwelling, and his group also constructs them. The furniture, lighting, rugs, drapery, bedding and decorative arts are designed exclusively for the house they go into, which is what produces the visual unity his work is known for — nothing in the room was chosen from anyone else’s catalogue.

His position is that mastering the build is integral to designing, and that one does not exist without the other. He has been responsible for some of the largest and most complicated private dwellings in the world, and in addition to houses has designed restaurants, lounges, private jets, cars, yachts and high-end retail spaces. The studio operates from 1540 Cornwall Road in Oakville, serving an international clientele including Toronto’s largest private estates.

Services offered by Ferris Rafauli

• Architectural design of ultra-luxury estate homes
• Interior design of ultra-luxury estate homes
• Construction of the designed dwelling
• Landscape design
• Custom fine furniture design and build
• Lighting, rug, drapery and decorative arts design
• Architectural plans
• Yacht, private jet and luxury commercial interiors

Why choose Ferris Rafauli for interior design in Toronto?

Because on an estate-scale project, total authorship is the only way to get total coherence.

Large houses designed by committee tend to betray it. The architecture says one thing, the interiors say another, the landscape was added later, and the furniture arrived from three different sources. Every seam is visible to anyone paying attention. A single designer controlling elevations through to decorative arts eliminates those seams by construction rather than by coordination.

The design-and-build integration is the other half of the argument, and it echoes — at a very different scale and price point — the logic that puts True Form at the top of this ranking. A designer who also builds cannot produce drawings that are impossible to execute, because the consequences land on his own organisation. Rafauli states this directly: understanding the build is integral to designing.

The custom furniture programme is what most distinguishes the finished result. Pieces designed for the specific room, in the specific material palette, at the specific proportions the architecture requires, produce a level of resolution that sourcing cannot reach no matter how good the sourcing is.

The limitations should be stated plainly. This is an ultra-luxury practice serving an elite clientele on estate-scale projects, the studio is in Oakville rather than Toronto, and the engagement model is total design rather than a discrete interior scope. For a house, a condo or a renovation, every other firm on this list is a more appropriate call.

Reviews and ratings

Rafauli’s standing is established through the scale and visibility of the built work rather than through review platforms or conventional advertising, and he is described as an award-winning designer working for clients worldwide.

This is the norm at this tier, where projects are private, clients are confidential and the work is rarely published in ordinary channels. Verification at this level runs through professional referral — architects, art advisors, private bankers and the small circle of people who commission houses of this kind. If you are in a position to be considering this practice, the reference network is already available to you.

Contacts

• Email: Use the website contact form
• Phone: 905-845-3733
• Website: ferrisrafauli.com
• Address: 1540 Cornwall Road, Suite 200, Oakville, ON L6J 7W5

How to Choose an Interior Designer in Toronto

The portfolios will all look good. What follows is how to tell the studios apart on everything the portfolios do not show.

Know what the titles actually mean in Ontario

Ontario protects the title “Registered Interior Designer,” which belongs to members of the Association of Registered Interior Designers of Ontario. It does not restrict who may describe themselves as an interior designer or an interior decorator. Anyone can use those two terms tomorrow.

This is not a reason to hire only certified designers. Some of the best residential work in this city is produced by people with no letters after their name, and no examination has ever taught anyone proportion. But it is a reason to know which you are dealing with, because the credentials correspond to genuinely different training.

An ARIDO member or an NCIDQ-certified designer has been examined on building systems, codes, construction documentation and professional practice — the parts of the job that happen behind the finishes. A decorator’s expertise is in furnishings, colour, textiles and styling, which is a real and valuable skill set and a different one. For a project that moves plumbing, opens walls or reworks electrical, the technical grounding matters. For furnishing a house that is already structurally sound, it may not.

Decide which of four service models you actually want

Most disappointment in this field is a mismatch between what the client assumed they were buying and what the studio sells.

Design-only produces drawings, specifications and a shopping list. You execute it — hiring the contractor, ordering the furniture, chasing the deliveries. Cheapest, and the most work for you.

Full-service design adds procurement and project management. The studio orders, tracks, receives, inspects and installs. Considerably more expensive, and the reason is that it is considerably more labour.

Turn-key means you leave and come back to a finished house. It is the most expensive model and the most complete.

Design-build puts the design and the construction inside one company on one contract. You lose the ability to tender the drawings to competing builders; you gain the elimination of the designer-builder seam where most problems originate.

Ask which model a studio actually operates before the first meeting. Several on this list do more than one.

Understand the fee structure and what it rewards

There are four common arrangements and each creates a different incentive.

Flat fee against a defined deliverable is the most predictable. You know the cost, the studio carries the risk of the project taking longer than expected, and there is no meter running during revision rounds. Its weakness is that scope must be defined precisely, or you will be paying for additions.

Hourly is the most flexible and the least predictable. It suits small or exploratory engagements and becomes uncomfortable on large ones, because every phone call has a price and clients start avoiding contact, which is the opposite of what a design process needs.

Percentage of project cost is common on large work and carries an obvious tension: the fee rises with the budget. It is not disqualifying — the designer’s workload does scale with project size — but it should be visible to you.

Cost-plus on furnishings means the studio buys at trade price and bills you at trade plus a stated markup. This is standard practice and perfectly legitimate when it is disclosed. It is a problem only when it is not, and when the markup is undisclosed you have no way of knowing whether a recommendation reflects the best piece or the best margin.

A fixed fee against a defined deliverable is the cleanest structure for most homeowners, because it makes the cost of design a known quantity before you commit.

Ask exactly what is in the deliverable

“A design package” means wildly different things at different studios, and the difference is the difference between a concept and a buildable set.

Ask for a list. A strong residential package includes a measured survey of the existing space, floor plans, reflected ceiling or lighting plans, elevations for every wall that has anything on it, millwork details and sections, an electrical layout showing every switch and outlet, a finish schedule, a selections list naming actual products with model numbers, and 3D views. A weak package is renderings, a mood board and a furniture list.

The three items most often missing and most often needed are elevations, millwork details and a specified selections list. Without elevations, the contractor guesses at heights. Without millwork details, the cabinetmaker interprets. Without specified products, the tile you get is the tile someone thought you meant.

Insist on a measured survey of the actual house

This is the technical step that separates professional documentation from decoration, and it matters disproportionately in Toronto.

Older houses here are not square, not plumb and not level. Century homes in Riverdale, the Annex and Parkdale have walls that wander by inches across a room, ceilings that slope, and floors that have settled toward the centre. A design drawn from builder’s plans, or from approximate dimensions, produces millwork that does not fit and tile layouts that go crooked at the far wall.

A measured survey means someone came and measured, so the drawings match the house rather than an idealised version of it. Ask whether it is included, and if it is not, ask what the drawings are based on.

Price the layout options before you fall in love with one

The most expensive hour in a design process is the one where a client approves a scheme nobody has costed.

Moving a kitchen to the other side of the house, relocating a bathroom, or removing a wall that turns out to be structural are all achievable and all carry a price that is invisible on a floor plan. If the options are priced for feasibility before you choose between them, the decision is informed. If they are not, you will choose on appeal and discover the consequences later, at which point redesigning costs money and abandoning the idea costs goodwill.

Ask directly: will you give me an order-of-magnitude construction cost for each layout option before I pick one? Studios that already work this way will say yes immediately.

Find out who is managing the trades, and what happens when drawings meet reality

This is the question the whole article turns on.

In a design-only engagement, the answer is you. When the electrician says the lighting plan conflicts with a joist, someone has to decide, and that someone is the homeowner unless the designer is contracted to be on site. Ask how many site visits are included, what happens between them, and who has authority to approve a field change.

In a design-build arrangement, the answer is the same company, and that is its principal advantage — there is no negotiation about whose problem a conflict is.

Either way, get it in writing. The phrase to look for is construction administration, and the question to ask is how much of it the fee includes.

Sort out the condo rules before the design starts

Roughly half the residential design work in downtown Toronto happens inside a building with its own rulebook, and that rulebook overrides the design.

Typical constraints: nothing may be altered on the exterior or anything visible from it, plumbing risers and the concrete slab cannot be touched, relocating a kitchen or bathroom drain may be impossible without a pump, flooring changes usually require a specified acoustic underlay rating, working hours are restricted, the service elevator must be booked, common areas must be protected, and a refundable damage deposit and approved drawings are usually required before anything begins.

Get the declaration, the rules and the renovation application from the property manager before the design starts. A designer who has worked in your building, or at least in buildings of that era, will know which battles are winnable. Budget for the additional costs too — board approval, elevator booking, deposits and restricted-hours labour are real line items that a house renovation does not carry.

Understand what an old Toronto house will impose on the design

Pre-war houses carry a standard set of conditions that change what is possible, and a designer who anticipates them writes better drawings.

Electrical service is frequently inadequate for a modern lighting and appliance plan, which means the panel becomes part of the budget. Knob-and-tube wiring survives in parts of the older neighbourhoods and many insurers will not cover a house that still has it active. Plaster and lath does not take modern fixings the way drywall does. Radiators constrain furniture layouts and are expensive to relocate. Ceiling heights on upper floors are often lower than they appear in photographs. And anything built before about 1990 should be tested for asbestos before demolition, because finding it mid-project stops the work.

Ask the designer what they expect to encounter given the age and neighbourhood of the house. A specific answer indicates experience; a reassuring one does not.

Treat lead times as the schedule, because they are

Design takes weeks. Procurement takes months, and it is what determines when you get your house back.

Custom upholstery commonly runs twelve to sixteen weeks or more. Custom millwork runs weeks after the drawings are final. Imported tile, stone slabs, specialty lighting and appliances all have their own clocks, and any one of them can hold a project. The most common cause of a stalled renovation is not the trades — it is a selection that was made late and a lead time that started late as a result.

Ask for a procurement schedule showing when each category must be ordered. Then make the decisions when the schedule says to, which is the single most useful thing a client can do for their own project.

Read the contract for revisions, ownership and procurement terms

Four clauses matter more than the rest.

Revision rounds: how many are included and what a further round costs. Unlimited revisions do not exist; the question is where the line sits.

Drawing ownership: many studios retain copyright and licence the drawings for the project only, which means you cannot take them to another builder or reuse them. Know this before you sign, not after a relationship goes wrong.

Procurement terms: who holds the deposits, what happens if an item arrives damaged, who pays for return shipping, and whether custom orders are refundable. Most are not.

Termination: what happens if you stop the project halfway, and what you receive in that event.

Check the portfolio for range, not just for style

It is easy to like a portfolio. It is more useful to interrogate it.

Look for a project in a house like yours — same era, same scale, same constraint. A studio whose work is entirely new-build suburban houses may be brilliant and still be learning on your 1912 semi. Look for whether the projects are visibly different from one another or whether the same scheme is being reapplied; strong studios have a recognisable sensibility, weak ones have a formula.

Then ask to see a full drawing set from a completed project alongside photographs of the finished space. Comparing what was drawn with what was built tells you more about a studio than any amount of portfolio browsing, and very few clients ever ask.

Take references about the end of the project

Everyone enjoys the beginning. Concepts are fun, mood boards are flattering, and every client is happy in week three.

Ask references about weeks twenty to thirty instead. Was the designer still responsive when the exciting phase was over? What happened when something arrived damaged or a supplier missed a date? Were the deficiencies dealt with, or did the last 5% of the project take six months? Did the final cost match the estimate, and if not, why not?

Ask the designer directly for a project that went badly and what they did about it. Everyone has one. Whether they have an answer ready, and whether it involves any accountability, is more informative than the portfolio.

Overall Summary

Ten studios, reduced to a decision:

True Form Construction is our top overall choice for Toronto homeowners who intend to build the design rather than admire it. Drawings, specification and construction sit inside one company under one contract, the deliverable includes the elevations, millwork details and item-level selections that most packages omit, layout options are priced before you choose, and the design fee works against the build. It is not the studio with the most magazine covers, and it does not try to be. It is the one where the design that gets approved is the design that gets built.

Anne Hepfer Designs is the choice for substantial homes and cottages where atmosphere, palette and material depth are the brief, from a designer internationally recognised for exactly that.

Ali Budd Interiors is the strongest option for furnishing an entire house at once, with a Castlefield studio staffed with project managers and a publication record spanning Vogue and Architectural Digest.

Laura Stein Interiors suits clients who want to make decisions and then have the house delivered — turn-key decorating and project management from an Ontario studio-of-the-year winner three years running.

Montana Labelle Design is for quiet, material-led interiors filled with pieces you will not see anywhere else, backed by a sourcing operation the studio runs itself.

Senso Design makes the most sense when cabinetry carries the design. Owning the cabinet shop means the millwork is drawn for your house rather than assembled from available sizes.

Jane Lockhart Design is the practical choice for a single room done properly — particularly a kitchen or bathroom, backed by two NKBA Pinnacle Awards and NCIDQ certification.

Delo Interiors is the credentialled boutique option: NCIDQ certified, ARIDO and IDC member, with direct access to the principal designer on every project.

Mason Studio suits conceptually ambitious and multi-unit work, with one of the deepest juried award records in the city and an in-house art consultancy.

Ferris Rafauli is the estate-scale answer, where the architecture, interiors, landscape and furniture are all designed and built by one group.

Whichever studio you approach, do three things before signing: get the deliverable listed item by item, confirm the fee structure and any furnishing markup in writing, and ask how many site visits are included once construction begins. Those three answers predict more about how the project will go than the portfolio ever will.

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