Renovation Costs in Singapore: What to Budget for an HDB or Condo
A realistic renovation budget for a Singapore home — what drives the cost, BTO vs resale vs condo, where the money goes, HDB rules and permits, and how to avoid overspending.
SG Block Index · updated 2026-07-16 · data.gov.sg & OneMap
Renovation is the cost buyers most often underestimate, because it is the one number no listing shows. What you spend depends far more on the condition of what you buy and the scope you choose than on the size of the home. Here is how to build a realistic budget before you commit — and where the money actually goes.
What actually drives the cost
The single biggest factor is how much you change. Cosmetic refreshes — paint, flooring, some built-ins — sit at the low end. Gutting and reconfiguring an old flat — hacking walls, rewiring, new plumbing, a full kitchen and bathrooms — sits far higher. A BTO starts closer to a blank slate and needs less structural work than a tired resale unit; a resale’s condition is exactly why you should inspect before you buy, since renovation is where a “cheaper” older flat quietly gets expensive.
Where the money goes
| Item | Share of budget | Notes |
|---|---|---|
| Carpentry (built-ins, wardrobes) | Often the largest | Custom carpentry adds up fast |
| Kitchen & bathrooms (wet works) | High | Tiling, plumbing, waterproofing |
| Hacking, masonry, flooring | Medium–high | More for older resale flats |
| Electrical & lighting | Medium | Rewiring pushes older flats up |
| Painting & finishing | Lower | Cheapest way to freshen a space |
HDB rules, permits and timelines
HDB renovations must follow the rules — permits for works like hacking non-structural walls, approved contractors on the HDB registered list, no touching structural elements, and permitted working hours. A resale flat often needs a longer renovation before you can move in, which may mean paying rent or a mortgage on two places for a stretch — a real carrying cost to plan for alongside the quote.
Budgeting so it doesn’t derail you
Get itemised quotes, separate must-haves (safety, waterproofing, essential fittings) from nice-to-haves (feature walls, premium finishes), and hold a 10–15% contingency for the surprises an old flat always hides. Renovation is part of the true cost of buying, not an afterthought — a home that looks cheap on price can cost more once it is liveable, so decide your total number first and shop within it.
Figures on this page are computed from the current snapshot and update each rebuild. Contains information from data.gov.sg (Singapore Open Data Licence) and OneMap, Singapore Land Authority. This is general information for research, not financial or professional advice.
Frequently asked questions
- How much does it cost to renovate a home in Singapore?
- It depends far more on condition and scope than size. A new BTO flat needs the least — mainly flooring, carpentry and fittings — while an older resale flat needing rewiring, replumbing, hacking and new kitchen and bathrooms costs substantially more. Carpentry and wet works take the biggest share; always hold a 10–15% contingency.
- What is the most expensive part of a renovation?
- Usually carpentry (custom built-ins and wardrobes) and the wet works — kitchen and bathrooms, where tiling, plumbing and waterproofing add up. Hacking, masonry and rewiring push older resale flats higher still. Painting and finishing are the cheapest way to freshen a space.
- Do I need HDB approval to renovate my flat?
- Yes for many works. HDB requires permits for works such as hacking non-structural walls, mandates that renovations use HDB-registered contractors, prohibits touching structural elements, and restricts working hours. A resale flat also often needs a longer renovation before you can move in — a carrying cost to plan for.