Reno Cost SG
Costs

Resale Flat Renovation Cost: Why It Costs More

Updated 25 Oct 2026 2 min read Reno Cost SG Editorial Team
An older HDB flat mid-renovation with bare cement floor after tile hacking and a step ladder
Short answer

A full resale HDB renovation in 2026 typically costs about S$55,000 (3-room) to S$98,900 (5-room), more than a comparable BTO. The gap comes from hacking old finishes, rewiring ageing circuits and repairing spalling concrete. These are illustrative industry ranges, not quotes.

On this page3 sections · tap to jump
  1. 01Resale vs BTO: the gap
  2. 02The hidden line items
  3. 03Where to spend and where to save

A resale flat gives you a bigger, often better-located home — but it usually costs more to renovate than a new BTO of the same size. In 2026 the illustrative full-renovation ranges are about S$55,000–S$68,300 for a 3-room resale, S$70,000–S$81,600 for a 4-room, and S$80,800–S$98,900 for a 5-room (works only, before furniture). These are compiled industry estimates, not quotes.

Resale vs BTO: the gap

A 4-room resale renovation commonly runs around S$20,000 more than the same-size BTO (about S$70,000–S$81,600 versus S$50,000–S$60,000).

Card comparing illustrative resale renovation ranges with a 4-room BTO

Illustrative resale renovation ranges vs a comparable BTO. Source: Qanvast, 2026.

The hidden line items

  • Hacking old floor and wall tiles. Removing and disposing of existing hard flooring adds roughly S$3–S$8 per square foot, plus S$1–S$3 per square foot to re-screed. On a whole flat that is thousands of dollars before a single new tile is laid. If the existing tiles are sound, you can often overlay vinyl or new tiles instead and skip this entirely.
  • Electrical rewiring. Older circuits may not handle modern appliance loads. A Licensed Electrical Worker (LEW) should inspect first — you may only need to add or move a few power points (about S$90–S$150 each) rather than a full rewire. All wiring work must be done by an EMA-licensed worker (electrical rules).
  • Spalling concrete repair. In older flats, corroding reinforcement bars make ceiling concrete crack and flake, especially in bathrooms and kitchens. It must be treated, not painted over.

Where to spend and where to save

You do not have to overhaul everything. Keep floor and wall tiles if they are in good condition; overlay rather than hack where possible; and prioritise rewiring and concrete repair over luxury materials. Reserve built-in carpentry for the kitchen and essential wardrobes. Because of the extra labour, a resale renovation also tends to take a little longer — around 8–11 weeks.

For the full picture across flat types, see the HDB renovation cost guide; for the no-hacking BTO comparison, the 4-room BTO breakdown.

Cost figures are illustrative ranges compiled from published industry sources, not quotes. Confirm current figures with your contractor and a licensed electrical worker.

Sources

  1. Expected Renovation Costs for HDB Flats in 2026 — Qanvast (as of October 2026)
  2. 7 Resale Flat Renovation Works: Prioritise or Skip — Qanvast (as of October 2026)
  3. Renovation Guidelines for Electrical Works — Housing & Development Board (HDB) (as of October 2026)