BTO renovation cost in Singapore: a 2026 breakdown by flat type

BTO renovation in Singapore in 2026 ranges from roughly $25,000 for a 3-room flat to around $85,000 for an Executive apartment. The 4-room range — which is what most first-time owners are renovating — sits between $35,000 and $55,000.

Where exactly your number lands inside those ranges depends on three things: how much carpentry you want, what flooring you choose, and how many built-ins you're asking for. The rest of this is for first-timers who want to understand where the money actually goes.

The ranges by flat type

These are honest ranges based on what most of our BTO clients end up spending, not what an ID portfolio website lists as a starting price.

• 3-room (around 65 m²): $25,000–$40,000, takes 4–6 weeks
• 4-room (around 90 m²): $35,000–$55,000, takes 5–7 weeks — this is the most common bracket
• 5-room (around 110 m²): $45,000–$70,000, takes 6–8 weeks
• Executive / EA (around 130 m²): $55,000–$85,000, takes 7–9 weeks

The spread inside each tier is real. A 4-room with vinyl floors, minimal carpentry, and standard finishes can genuinely come in at $35,000. The same 4-room with marble floors, full-height wardrobes in all three bedrooms, custom kitchen island, and a feature wall in the living room? That's the upper end, sometimes higher.

Where the money actually goes

For a typical 4-room BTO renovation, the cost breakdown looks roughly like this:

• Carpentry (kitchen cabinets, wardrobes, TV console, shoe cabinet) — 35-45% of total
• Flooring (whole unit) — 15-20%
• Electrical (sockets, lighting points, DB upgrade) — 8-12%
• Plumbing (kitchen, both bathrooms) — 6-10%
• Painting (interior) — 5-8%
• Permits, project management, contingency — 8-12%

Carpentry is almost always the largest cost line, and where the biggest variation lives. Built-in wardrobes alone can run anywhere from $4,000 for basic floor-to-ceiling units in two bedrooms, to $8,000+ if you want full-height units in three bedrooms with internal organisers and soft-close hinges.

Flooring is the next big variable. Vinyl is the cheapest option and fine for most rooms. Tiles cost more and feel more solid underfoot. Marble is the premium option and adds significantly to both material and labour cost. Most clients mix — tiles in wet areas, vinyl in bedrooms.

What's typically included in a BTO quote

When we quote a BTO renovation, the price covers:

• HDB renovation permit (we file it on your behalf — you don't deal with HDB directly)
• Full electrical: power points, lighting points, distribution board upgrade if needed
• Plumbing: kitchen sink, bathroom fixtures, washer point, water heater connection
• Carpentry: built-in wardrobes, kitchen cabinets, TV console, shoe cabinet, study table
• Flooring across the entire unit — you pick the design
• Painting: full interior including ceilings, your colour scheme, Nippon or Dulux
• Aircon coordination: tray casing + concealed piping ready for the installer
• Final clean + handover walkthrough + 12-month workmanship warranty

Different contractors include different things, which is part of what makes BTO quotes hard to compare. Always check the line-item scope, not just the bottom-line number.

What's usually NOT included

These are the costs that catch first-timers off guard, because they assume the renovation quote covers everything:

• Furniture — sofa, beds, dining table, chairs
• Appliances — fridge, washing machine, oven, hob, cooker hood
• Aircon units themselves (we coordinate the install but the units are a separate purchase)
• Curtains and blinds
• Designer light fittings — chandeliers, pendant lights you supply yourself
• Soft furnishings — rugs, decorative items, art

Budget another $15,000–$25,000 for these on top of the renovation. Some people spend less by buying second-hand or through marketplace deals; some spend more if they want premium appliances. Either way, plan for it before signing the renovation contract.

How long it actually takes

Plan for 6 to 10 weeks from contract signing to move-in ready, depending on flat size and how much carpentry you have. That breaks down roughly as:

• 1–2 weeks: design finalisation, material selection, permit submission
• 4–7 weeks: actual build phase (electrical and plumbing first, then carpentry, tiling, painting)
• 1 week: handover, snag fixes, final clean

One thing worth mentioning: you can't start renovation until your defects liability period is sorted with HDB. Most clients do their design and permit applications during the defects period, then start the actual build the day defects are closed. That saves 4-6 weeks of waiting.

Payment schedule

Standard BTO payment milestones look like this:

• 10% on contract signing
• 30% on commencement (when we order materials)
• 30% at the mid-point (after electrical and plumbing rough-in passes inspection)
• 25% at completion
• 5% held back for 30 days post-handover, released once you confirm no snags

All payments should go via bank transfer to a company account with a full invoice for each milestone. Avoid contractors who ask for cash payments or large upfront deposits beyond the standard 10%.

Can you phase the renovation?

Yes, and we recommend it for first-time owners who are cash-tight. The common phasing is to do the essentials first — kitchen, both bathrooms, flooring throughout, and the master bedroom — then come back six months later for the second bedroom, study, and any entertainment built-ins.

The trick is to design the full plan upfront, so phase 2 slots in cleanly without redoing any of phase 1. About a third of our BTO clients do some version of this.

Should you use an ID or go direct?

This depends mostly on how much design help you need.

Interior designers add 10-20% to the total cost in exchange for full design service, 3D renders, material curation, and project management on top of the build. They're worth it if you have a clear style vision you want executed precisely, or if you genuinely don't want to make material decisions yourself.

Going direct to a licensed contractor is cheaper and works well if you have a clear idea of what you want, are happy to look at material samples yourself, and don't need elaborate 3D renders. About 70% of our BTO clients come direct, the other 30% via an ID.

Where first-timers usually under-budget

These are the cost lines that most catch first-time BTO owners off guard:

Built-in carpentry. If you want full-height wardrobes in every bedroom plus a custom kitchen, expect carpentry alone to be $15,000-$20,000 of your total. People often underestimate this because IKEA-style wardrobes seem cheap, but built-in is structurally different work.

Electrical points. Adding power points or moving them later is significantly more expensive than including them in the original scope. Walk through every room before signing and think about where you'll actually want sockets — including the bedside, behind the TV, the kitchen counter, and at least two USB-capable points.

Lighting design. Most quotes include basic downlights but not feature pendants, dimmer switches, or track lighting. If you want anything more ambitious than downlights, factor in another $500-$1,500 depending on scope.

Aircon. The renovation quote usually covers only the casing and piping work, not the aircon units themselves. A System 3 install (3 indoor units, 1 outdoor compressor) for a 4-room BTO starts around $1,900 including units; System 4 for larger flats lands closer to $2,800-$4,500 depending on brand and BTU rating.

The licence point

BTO renovation in Singapore needs to be done by an HDB Licensed Contractor. Without that licence, the work is not legally compliant, and you may not be able to sell the flat in future without redoing portions to HDB's satisfaction. Always check the contractor's HDB Licence number before signing.

We're HDB Licensed (HB-10-5499Z) and ME05 L1 for electrical works. The licence numbers appear on every quote and every invoice.

How we quote

We offer a free site visit at your BTO once keys are collected. We walk through with you, you tell us what you want, we measure everything, and a written quote follows within 48 hours. The quote is fully line-itemed, so you can pick what stays in and what gets cut to fit your budget.

WhatsApp us your flat type, block and unit number, and a Pinterest board or rough idea of the style you want. That's usually enough to get started.

To summarise

BTO renovation in Singapore in 2026 lands in these ranges for most first-time owners:

• 3-room: $25,000–$40,000 over 4–6 weeks
• 4-room: $35,000–$55,000 over 5–7 weeks
• 5-room: $45,000–$70,000 over 6–8 weeks
• Executive: $55,000–$85,000 over 7–9 weeks

Add another $15,000–$25,000 for furniture, appliances, and soft furnishings. Plan to start design and permit work during your defects liability period so you can begin building the day defects clear. And get the full scope line-itemed before signing, so the comparison between quotes is apples to apples.