HDB Renovation Cost in Singapore: BTO vs Resale
What actually drives your renovation budget, and why BTO and resale flats end up so far apart in price.
HDB Renovation Cost Singapore: Why There's No Single Price
Every renovation quote is really the sum of several separate line items — hacking, carpentry, tiling, electrical, painting and more — priced individually and added up. Two 4-room flats can end up with very different bills because one needed a full bathroom hack-and-rebuild and a run of custom carpentry, while the other just needed painting and a kitchen refresh. Market-wide figures are a useful starting point for budgeting, but your actual number only comes from an itemised quote after a site visit.
HDB Renovation Cost Ranges in Singapore
As a general guide, published market data for Singapore renovations in 2026 puts full-flat renovation budgets roughly in these bands:
- 3-room BTO: approximately S$25,000–S$45,000
- 4-room BTO: approximately S$40,000–S$62,000
- 4-room resale: approximately S$55,000–S$95,000
- Full resale flat (all sizes): roughly S$51,000–S$97,000
These are market-wide ranges, not a quote from us — think of them as a planning benchmark. The actual figure for your unit depends on scope, material grade and how much of the flat you're touching.
Why BTO Renovations Cost Less Than Resale
The gap between BTO and resale budgets — typically 20–40% — comes down to three things:
- No hacking needed. A new BTO has no existing tiles, cabinetry or partitions to demolish and clear before work can start.
- Wiring and plumbing are new. Resale flats, especially older ones, often need rewiring or pipe replacement that a BTO simply doesn't require.
- Waterproofing warranty. HDB's waterproofing warranty typically still covers a new flat, so bathroom and kitchen waterproofing work can sometimes be scoped down.
What Actually Moves Your Number Up or Down
Within any flat type, the biggest swing factors are:
- Amount of hacking — removing existing tiles, walls or built-in structures
- Carpentry volume — the number of linear metres of wardrobes, cabinets and shelving
- Material grade — laminate vs veneer vs solid surface, standard vs large-format tiles
- Wet area work — bathroom and kitchen renovations are disproportionately expensive per square metre
- Electrical scope — a full rewire vs adding a few power points
How to Get an Accurate Number
Cost does not change by estate, but flat age does, and that is what drives the scope. We cover what we typically find in Tampines, Yishun, Woodlands, Sengkang, Punggol and Tengah.
A market range is a starting point for planning your budget, not a substitute for a real quote. We provide a fully itemised quotation after a free site visit — every trade priced separately, with no hidden charges — so you know exactly what you're paying for before work begins.
HDB Renovation Cost FAQ
Do you need an HDB permit for renovation?
Most renovation work in an HDB flat needs a permit, including hacking, floor finishes, and bathroom waterproofing. The permit is submitted through HDB’s system by a contractor listed in HDB’s Directory of Renovation Contractors (DRC), not by the flat owner. On our jobs we arrange this through an HDB-registered contractor and coordinate the approval before work starts.
What is an HDB hacking permit?
It is the approval needed before removing or altering walls. Structural walls, beams and columns cannot be touched at all. Non-structural walls can usually be removed with approval, and HDB also limits how much floor screed and tile thickness you can add back. We check what your layout allows at the free site visit, before quoting.
How much does a BTO renovation cost in 2026–2027?
Use the ranges above as a starting point: a BTO usually costs less than a resale flat of the same size because the floors, sanitary ware and kitchen are new, so the budget goes to carpentry, lighting and painting instead of hacking and re-waterproofing. Your own number depends on carpentry run-metres, how many bathrooms are touched, and the finishes you pick.
How long does an HDB renovation take?
Six to eight weeks for a typical 4-room flat. Hacking takes about a week, waterproofing and tiling two to three weeks, carpentry fabrication and installation three to four weeks, with painting and touch-ups at the end. A BTO is usually shorter, at four to seven weeks.
Should I use an interior designer or a renovation contractor?
An interior design package bundles design, project management and the trades, and the design fee and margin sit on top of the build cost. Going direct to a contractor means you deal with the people doing the work and pay for the work itself, which suits homeowners who already know the layout they want. If you want a full design concept and material curation, an ID earns their fee. We are a contractor, so we quote the build, trade by trade.
Get Your Own Itemised Quote
Free site visit and detailed quotation within 3 working days. No obligations.