8 Best Interior Design & Renovation Firms in Singapore 2026 — HDB BTO, Resale & Condo (Costs + How to Vet)

Swiss Interior is one of Singapore's larger, longer-established interior design firms — a safe-pair-of-hands all-rounder that handles HDB BTO, resale flats, and condominiums end-to-end. WHAT IT'S KNOWN FOR: turnkey full-service (design concept + 3D visuals + project management + in-house/partner carpentry), a broad portfolio spanning modern contemporary, Scandinavian, muji, and luxe styles, so they're not locked to one aesthetic. WHO IT SUITS: owners who want an established firm with a deep portfolio and structured processes rather than a one-person studio — particularly first-time BTO owners who value hand-holding through the whole renovation. WHAT TO CHECK: which specific designer is assigned to you (at bigger firms the designer matters more than the brand), recent completed projects in your exact flat type, and the milestone payment schedule. CONFIRM current package pricing directly — published packages change, and the final number depends on your scope, materials, and carpentry volume.

Weiken.com is a well-known mid-to-large Singapore ID firm with a strong online presence and a process-driven approach to HDB + condo renovation. WHAT IT'S KNOWN FOR: structured renovation packages, solid space planning, and a clean contemporary / Scandinavian / muji aesthetic that photographs well and suits the mainstream SG taste — a reliable default for BTO and resale owners who want a clear, organised journey from concept to handover. WHO IT SUITS: owners who like the reassurance of a defined package and a firm with visible reviews + a large completed-project gallery, rather than a fully bespoke (and pricier) design studio. WHAT TO CHECK: exactly what the package includes vs excludes (carpentry runs, appliances, haulage, sanitary fittings are common add-ons), the assigned designer's own portfolio, and the deposit/payment milestones. As always, get the current quote in writing and compare it line-by-line against 2-3 other firms.

Icon Interior Design is an established Singapore residential firm covering HDB BTO, resale, and condo projects with full-service design + build. WHAT IT'S KNOWN FOR: dependable mainstream residential work across a range of styles (contemporary, modern luxe, transitional), with the project-management muscle to coordinate the trades — carpentry, electrical, plumbing, masonry, painting — so owners aren't juggling subcontractors themselves. WHO IT SUITS: BTO and resale owners who want a competent full-service firm without paying the premium of a high-design studio — the practical middle of the market. WHAT TO CHECK: as with any larger firm, the individual designer assigned to you is the real variable — ask to see their personal completed projects (not just the company gallery), confirm the warranty/defects-rectification terms, and pin down the payment schedule. Pricing varies widely by scope; get the written quote and benchmark it.

The Carpenters Design Group (often just 'Carpenters') is a design-forward Singapore firm known for bespoke, curated interiors — the step up when distinctive design matters more than the lowest quote. WHAT IT'S KNOWN FOR: a strong visual identity, considered material palettes, and statement spaces that go beyond the standard BTO package look — typically condo, landed, and higher-end HDB projects. WHO IT SUITS: owners with a bigger budget who care about design distinctiveness and are renovating a condo or landed home, or a BTO owner willing to invest more for a non-generic result. WHAT TO CHECK: design-led firms command higher fees, so be clear on the design fee vs build cost split, the scope of customisation, and timeline (bespoke detailing takes longer). Ask for projects similar to yours in property type + budget band, and confirm who handles on-site project management. Get the quote in writing and understand exactly what drives the premium.

Free Space Intent is one of Singapore's larger award-decorated interior design firms, with a broad residential + commercial portfolio. WHAT IT'S KNOWN FOR: scale, a long list of design awards, and the ability to deliver across a wide range of styles and project sizes — from HDB and condo homes to commercial fit-outs — backed by the resources of a sizeable established firm. WHO IT SUITS: owners who want the reassurance of an award-recognised firm with a large body of completed work, and who may have a more design-ambitious brief. WHAT TO CHECK: at a firm of this scale, your specific designer + project team are what determine your experience — ask who they are and to see their personal portfolio. Confirm the project-management process, the warranty terms, and the milestone payment schedule. Awards signal capability but don't replace your own due diligence on the assigned team; get the written quote and compare.

Akihaus is a design-led Singapore firm known for considered, architectural interiors — the choice for owners who treat their home as a design project rather than a checklist of carpentry. WHAT IT'S KNOWN FOR: a thoughtful, design-driven approach with attention to spatial flow, proportion, and material detailing, often on condo and landed homes (and design-conscious HDB owners). WHO IT SUITS: owners who prioritise a coherent design vision and are willing to invest in it — people who've saved reference images for years and want a designer who'll elevate, not just execute, the brief. WHAT TO CHECK: design-forward studios typically charge a design fee and work to a more considered (longer) timeline, so align on budget, fee structure, and schedule upfront. Ask to see completed projects in a similar style + property type, and clarify how build/project management is handled (in-house vs partner contractor). Get the written quote and understand the design-fee component.

Mr Shopper Studio is a boutique design-forward Singapore ID known for space-planning and storage-smart design — particularly valuable for compact HDB flats and smaller condos where every square metre counts. WHAT IT'S KNOWN FOR: a considered, often data- and lifestyle-informed approach to layout and storage, turning awkward or small spaces into functional, stylish homes without the generic 'package look'. WHO IT SUITS: owners of smaller or oddly-configured homes who need clever space optimisation, and style-conscious buyers who want a boutique studio's attention rather than a high-volume firm's conveyor belt. WHAT TO CHECK: boutique studios offer closer designer attention but have less capacity, so confirm their availability for your timeline. Clarify the design fee, the scope of custom carpentry (their storage solutions are often bespoke), and project-management arrangements. Ask for completed projects in your flat size, and get the written quote — bespoke storage design can carry a premium that's worth it for small homes.

Livspace is a tech-enabled interior design platform (operating across the region including Singapore) that takes a more standardised, end-to-end approach than a traditional bespoke studio. WHAT IT'S KNOWN FOR: in-house + partner designers matched to you, a digital design-and-quote process with itemised fixed-price quotes, productised carpentry/materials catalogues, and a warranty on the work — appealing to owners who want transparency and a structured, app-tracked journey rather than the open-ended back-and-forth of some traditional firms. WHO IT SUITS: BTO and condo owners who value upfront fixed pricing, clear cataloguing, and process transparency, and who are comfortable with a more systematised (less fully-bespoke) design model. WHAT TO CHECK: confirm exactly what the fixed quote covers vs add-ons, the warranty terms + who services them, and the designer assigned (the platform model still hinges on your individual designer). Read recent reviews for project-management consistency, and as with every firm, benchmark the quote against 2-3 traditional firms on identical scope.