Cost Guide · Updated April 2026

Interior Design Cost in Singapore (2026)

Q: What is the difference between hiring an ID firm vs a direct contractor?

ID firms charge a design fee (S$1,500–S$6,000) plus 20–30% markup on contractor works for project management, 3D renders and material coordination. Direct contractors skip the design layer and charge lower rates, but homeowners manage the project themselves.

How much does interior design really cost in Singapore? This guide breaks down 2026 price bands for HDB BTO, resale flats and condos — from consultation-only fees to full turnkey packages.

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HDB BTO Interior Design Packages

BTO flats arrive in bare condition. These ranges cover full ID packages including layout design, carpentry, flooring, painting, plumbing and electrical works.

2-Room Flexi BTOS$15,000 – 28,000Compact layout, basic carpentry and finishes.

3-Room BTOS$25,000 – 45,000Standard ID package with kitchen, bath and living room carpentry.

4-Room BTOS$40,000 – 62,000Most popular — full carpentry, quality flooring and feature walls.

5-Room / 3Gen BTOS$45,000 – 70,000Larger unit with more rooms, higher material volume.

Why the wide range? The lower end covers laminate finishes and standard fittings. The higher end includes quartz countertops, sintered-stone backsplash, upgraded sanitary ware and more carpentry.

Resale HDB Interior Design Cost

Resale flats typically cost 20–40% more than BTO because of hacking, rewiring, waterproofing redo and disposal. Budget for the extra demolition layer.

3-Room ResaleS$35,000 – 58,000Hacking old tiles, rewiring, new layout and finishes.

4-Room ResaleS$48,000 – 78,000Full gut-and-redo with new plumbing and electrical.

5-Room ResaleS$55,000 – 90,000Extensive hacking, premium carpentry and finishes.

Condo Interior Design Cost

Condo renovations add MCST approval fees, lift-padding deposits, restricted work hours and often taller ceilings that increase carpentry cost.

Studio / 1-Bed (New)S$15,000 – 38,000Compact scope — carpentry, paint, basic wet-area touch-up.

2-Bed Condo (New)S$25,000 – 49,000Standard new-condo package with kitchen and bath finishes.

3-Bed Condo (New)S$32,000 – 68,000Full ID with feature walls, walk-in wardrobe, quality flooring.

2-Bed Resale CondoS$48,000 – 72,000Add hacking, rewiring and waterproofing to base scope.

3-Bed Resale CondoS$60,000 – 85,000Full gut renovation with premium finishes.

4-Bed / PenthouseS$80,000 – 150,000+Custom joinery, imported materials, luxury turnkey.

Interior Design Fee Breakdown

Not every homeowner needs a full package. Here is what each tier of interior design service typically costs on its own.

Consultation OnlyS$50 – 250One-off session: mood board, material advice, layout suggestions. No commitment to full reno.

Design Fee (Plan Only)S$1,500 – 6,000Floor plan, material selection, 3D renders — without project management or contractor coordination.

3D Visualization Add-OnS$300 – 500 / roomPhotorealistic renders to preview each room before committing.

Full ID Project Management5 – 10% of reno budgetDesign + site supervision + contractor coordination throughout.

ID firm vs direct contractor ID firms typically add a 20–30% markup over direct contractor rates. In return, you get project management, 3D renders, material sourcing and a single point of accountability. Direct contractors charge less but you manage the project yourself.

ID Firm vs Direct Contractor — Quick Comparison

Factor	ID Firm	Direct Contractor
Design & 3D Renders	Included in package	Extra S$300–500 per room
Project Management	Included (site visits, timeline tracking)	Homeowner manages
Material Sourcing	Curated options, bulk discounts possible	Homeowner selects
Price Transparency	Bundled — harder to compare line items	Itemised quote
Cost Premium	20–30% above contractor rates	Base rate
Best For	Busy owners wanting turnkey service	Hands-on owners wanting cost control

What Affects Interior Design Cost?

Flat Type & Size

A 5-room HDB needs more materials, more carpentry and more labour than a 3-room. Condo units with higher ceilings push carpentry costs further.

BTO vs Resale

Resale flats incur hacking, disposal, rewiring and waterproofing that BTO flats skip. This alone adds 20–40% to the budget.

Material Grade

Laminate vs quartz countertops, vinyl vs marble flooring, standard vs premium sanitary ware — each tier step multiplies cost significantly.

Carpentry Volume

Built-in wardrobes, shoe cabinets, TV consoles and kitchen cabinets are the single largest cost driver in most Singapore renovations.

Wet-Area Scope

Full bathroom or kitchen overhaul (hacking, waterproofing, re-tiling, new fixtures) costs far more than cosmetic updates like repainting or new hardware.

Design Complexity

Feature walls, concealed lighting, curved carpentry and custom joinery all require more skilled labour and precise coordination.

Common Add-On Costs

Items often quoted separately from the base ID package.

Flooring (Vinyl)S$5 – 12 / sqftSPC or LVT with installation. Budget S$4,000–9,600 for 800 sqft.

Flooring (Tiles)S$10 – 12 / sqftCeramic or porcelain with labour. Marble runs S$18–40/sqft.

Full-Unit PaintingS$900 – 4,000Depends on unit size. Premium washable paint costs S$200–400 extra.

Electrical RewiringS$2,500 – 5,000Full rewiring for resale flats. New power points S$80–150 each.

Built-In WardrobeS$180 – 320 / ftPer linear foot. 6-foot wardrobe ≈ S$1,080–1,920.

Kitchen CabinetsS$8,000 – 20,000Basic laminate to quartz counters with integrated appliances.

* All prices are indicative 2026 ranges. Final quote subject to on-site assessment.

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Frequently Asked Questions

How much does interior design cost for a 4-room HDB BTO in 2026?

A 4-room HDB BTO interior design package typically costs S$40,000 to S$62,000. This covers layout planning, carpentry, flooring, painting and basic electrical. Resale 4-room flats cost 20–40% more due to hacking and rectification work.

What is the difference between hiring an ID firm vs a direct contractor?

ID firms charge a design fee (S$1,500–S$6,000) plus a 20–30% markup on contractor works for project management, 3D renders and material coordination. Direct contractors skip the design layer and charge lower rates, but homeowners manage the project themselves.

Does the interior design package include furniture and appliances?

Most ID package prices cover built-in carpentry, flooring, painting, plumbing and electrical works. Loose furniture, appliances and soft furnishings are usually quoted separately or included only in premium turnkey packages.

How long does a full interior design project take?

Design phase takes 2–4 weeks. Construction takes 6–8 weeks for BTO flats and 8–12 weeks for resale or condo units. Total timeline from first meeting to move-in is typically 3–4 months.

Can I hire an interior designer for consultation only?

Yes. Many ID firms offer one-off consultations at S$50–S$250 per session. You get a mood board, material advice and layout suggestions without committing to a full package.

Why do resale flat renovations cost more than BTO?

Resale flats need hacking of old tiles and built-ins, rewiring of dated electrical systems, waterproofing redo, and sometimes structural rectification — adding 20–40% to the base BTO renovation cost.

Related Cost Guides

Renovation Cost Singapore HDB Renovation Cost BTO Renovation Cost Condo Renovation Cost Kitchen Renovation Cost Built-In Wardrobe Cost Renovation Singapore Full House Customization