Best 10 Interior Architecture Firms in Singapore

1. WOHA

WOHA is the most exportable name on this list, but its interior architecture practice is not a separate desk—it is executed by the same architectural teams that deliver Parkroyal on Pickering and Oasia Hotel Downtown. The firm runs Revit across most projects above S$20M in construction value, and produces its own joinery detail packages in-house. For interior scopes, they frequently take on hotel lobbies, sky gardens, and public-facing podium spaces, with per-key FF&E and interior architecture budgets around S$120k–S$180k for five-star properties. Clients enter with a completed concept design and stay until the final snagging list is burned. If you are looking for hotel or mixed-use interiors with a strong bioclimatic agenda, WOHA is the only firm on this list that will push a green-wall irrigation layout to the same level of detail as the floor slab.

2. Ministry of Design (MOD)

Colin Seah’s studio in Bukit Pasoh operates as a multi-disciplinary practice, but interior architecture is the core revenue line. MOD delivered the New Majestic Hotel interior architecture, the Cathay Cineplex at Cineleisure, and a series of flagship retail fit-outs around Orchard Road. The studio works natively in Archicad, which makes collaboration with European and Australian contractors smoother than the typical AutoCAD tender set. Their typical project range is S$1.5M to S$15M, and their boutique hotel work runs S$80k–S$150k per key. MOD also handles a large share of F&B prototype rollouts—some clients bring a single flagship, then order 10 to 20 cloned fit-outs across Southeast Asia. They are a strong pick if you need both the spatial concept and the franchise-ready technical drawings under one roof.

3. Asylum

Asylum, founded by Chris Lee, is the go-to for high-impact F&B and nightlife interiors in Tanjong Pagar, Haji Lane, and the Club Street conservation area. Their work on Neon Pigeon and Butcher Boy set the template for dark, layered, material-heavy fit-outs that survive Singapore’s high-volume service environment. Asylum runs a parallel construction arm, which means the design team controls the tender and the site works under one management structure. A typical 1,500-sq-ft F&B fit-out runs a 16-week crash programme from design freeze to Temporary Occupation Permit (TOP) acceptance. They operate with 3ds Max for concept visuals and AutoCAD for statutory submission sets. If you have a bar or restaurant with a concrete opening date, Asylum is one of the only firms on this list that will put its own crew on site to hold that date.

4. DP Architects

DP Architects runs an interior architecture division inside one of Southeast Asia’s largest practices. They win the large-format work: Suntec City interiors, major healthcare lobbies, and corporate headquarters fit-outs in Marina Bay and Raffles Place. Their documentation pipeline is Revit-first, and their BIM coordinators sit in the same office as the project architects, which removes the usual clash-detection friction on mixed-use towers. DP’s design fees for interior architecture typically land at 5%–8% of construction cost, and they are comfortable with design-and-build contracts, where the contractor controls the timeline but DP controls the detailed design. They are not the right firm for a 1,200-sq-ft artisan café, but they are unmatched for any interior scope that sits inside a larger architectural project and must align with core wall penetrations, MEP zoning, and lift lobby planning.

5. Ong&Ong

Ong&Ong is a full-service practice with a dedicated interior architecture team serving landed residences in Sentosa, Nassim Road, and the East Coast, plus corporate lobbies and show suites across the central region. Their in-house team numbers roughly 150 across architecture and interiors in Singapore and Ho Chi Minh City. For interior architecture, they charge fixed-time contracts ranges of S$18–S$35 per sq ft, with the lower end reserved for repeat corporate landlords who need consistent lobbies and corridor standards. They document joinery in 2D AutoCAD and use SketchUp for client presentations, which keeps the design cycles fast but demands that the contractor read drawings carefully. Ong&Ong is a practical choice for a private residence where you want the architect to handle the permit drawings for URA or BCA and the interior architect to align all finishes, ceiling heights, and joinery in a single submission package.

6. Studio Wills + Architects

Studio Wills + Architects, directed by Will Ng, has built a niche in adaptive reuse of heritage shophouses and small-floor-plate commercial spaces in Tanjong Pagar, Bukit Pasoh, and Tengah. Their projects rarely exceed 3,000 sq ft, and construction budgets sit in the S$1M–S$6M band. What sets them apart is their willingness to execute conservation-grade interior architecture: they handle URA compliance for facade retention, structural probing, and custom fabrication of period-style joinery. The studio operates a small workshop that builds its own fixtures, which is rare in Singapore where most firms coordinate a chain of subcontractors. They document complex geometry in Rhino and hand-draw details that later become tender documents. If your building is a conservation property and the landlord’s interior must respect the original timber stair and window grilles, this is a firm that knows the exact limits of what URA will accept.

7. K2LD

K2LD, led by Kay Ngee Tan, does interior architecture as an extension of its architecture practice, with a strong record in residential and institutional projects. Their work covers private houses on the East Coast, special-needs school interiors, and community club spaces. K2LD runs Revit as standard and conducts post-occupancy reviews—unusual in this market—which feed back directly into the details of their next project. Their residential construction budgets typically sit at S$400–S$700 psf, and they operate at a scale where the principal is still personally involved in the interior layout and material selection. This is a good fit for a homeowner or a school board that wants the same team to take the building from shell-and-core to finished interior without a separate interior consultant interpreting the architecture.

8. RT+Q Architects

RT+Q Architects, led by founding director Rene Tan, is best known for public housing and civic work, including the Pinnacle@Duxton. Their interior architecture portfolio is less visible in glossy magazines but covers the institutional spaces that most private firms cannot crack: void-deck improvements, community club interiors, and office fit-outs for statutory boards. RT+Q uses Navisworks for site clash coordination, which matters when you are threading interior works through an occupied or partially occupied building. Their fee structure is competitive, and they are comfortable with public-sector procurement timelines, including the mandatory tender documentation and supplier disclosure requirements. If your project is a town council building, a polyclinic, or a community facility with a public budget line, RT+Q will produce a compliant, buildable interior architecture package where others struggle with the paperwork.

9. Produce Workshop

Produce Workshop, led by Khoo Teik Hwa, is a deliberately small studio of about 8 to 10 people that takes on highly experimental interior architecture work in Chinatown and the Central Business District. Their projects include micro-apartments and compact office fit-outs with build costs under S$1M. The team documents in Rhino and V-Ray, and the principal runs the site directly—there is no separate project management layer. This makes Produce Workshop a good match for a client who wants a built environment that tests spatial limits, such as a 400-sq-ft apartment with sliding partition walls or an office that converts to a gallery after hours. The trade-off is throughput: they take fewer than six projects a year, so if your timeline is tied to a specific lease start date, expect to hold early conversations a year in advance.

10. Lekker Architects

Lekker Architects, founded by Randy Chan and Lim Shing Hui, is a community-focused practice active in Kembangan, Toa Payoh, and the Civic District. Their interior architecture work covers community clubs, public installation spaces, and playful retail interiors, operating with project budgets of S$500k–S$2.5M. They use Rhino and physical modeling, and they run co-design workshops with end users before a single tender drawing is issued. This is a firm that will ask you who actually uses the space, then design from that answer rather than from a corporate standard. Lekker is the right choice for public-facing interior architecture where the client is a grassroots organisation, a library board, or a social enterprise that needs the space to serve a specific community rather than a broad market demographic.

Singapore Interior Architecture Firms: Data Summary