HDB 4-Room Renovation Cost Breakdown Singapore 2026

The honest answer to "how much does it cost to renovate a 4-room HDB?" is: between S$35,000 and S$80,000 in 2026, with the middle of the bell curve sitting around S$50,000. The range is wide because the spread between bare-minimum and premium finishes is genuinely that big — not because anyone is hiding numbers.

This guide breaks the total down by trade, with real 2026 numbers from active projects, so you can sanity-check the quotes you're getting.

The headline numbers (4-room HDB, ~93 sqm)

The "bare-minimum" column assumes you go direct to trades (no interior designer), keep the existing layout (no hacking), and use baseline materials throughout. The "premium" column assumes a designer-led job with quartz tops, lacquer fronts, full lighting design, and imported sanitary wares.

Trade-by-trade breakdown

Carpentry — the biggest single line item

Carpentry is typically 30 to 40% of the total renovation budget on a 4-room HDB. A mid-range 4-room build includes:

• Kitchen cabinetry (10 to 14 linear feet): S$6,500 to S$10,500
• Built-in wardrobes (3 bedrooms): S$5,500 to S$9,000
• TV console / feature wall: S$1,800 to S$3,500
• Shoe cabinet: S$1,200 to S$2,500
• Vanity counters (2 bathrooms): S$1,500 to S$3,000
• Study desk or kitchen island (optional): S$1,500 to S$3,000

What pushes the carpentry total up: door material (lacquer or veneer vs laminate), specialty hardware (lift-up Aventos doors, magic-corner pull-outs), tall pantries (above 2.1m), and any built-in appliances that need niche fabrication.

What keeps it down: laminate fronts, soft-close hardware as standard (don't pay extra for Blum or Hettich — it should be included), and avoiding handleless routed fronts where clip-on handles do the job.

For a deeper look at how kitchen carpentry is priced specifically, see the HDB kitchen cabinet cost guide.

Flooring — the second biggest

Flooring scales fast with material choice:

• Vinyl click-lock: S$4 to S$7 per sqft installed. The 2026 baseline for HDB. Decent, easy to install, replaceable.
• Laminate flooring: S$5 to S$9 per sqft. Slightly more durable, slightly better feel underfoot.
• Engineered timber: S$12 to S$20 per sqft. Real wood top layer; premium look, susceptible to water damage.
• Porcelain or marble tile (full flat): S$10 to S$22 per sqft installed. Most expensive option, also most durable.

A 4-room HDB is ~1,000 sqft. Vinyl across the whole flat is S$4,000 to S$7,000 installed; engineered timber across the whole flat is S$12,000 to S$20,000.

Electrical re-wiring

For most BTO flats, the existing wiring is adequate and you only pay for additional points and switch relocations. For resale flats, full re-wiring is common because old wiring may not meet current capacity needs (induction hobs, air-cons, etc.).

• BTO additions only: S$2,500 to S$4,500
• Resale full re-wire: S$5,000 to S$8,000

Hacking

Knocking down walls and bathroom hacking. HDB requires permits for any structural alteration and some non-structural changes. A typical 4-room hack:

• Remove one non-load-bearing partition: S$800 to S$1,500
• Full bathroom hack (one bathroom): S$1,200 to S$2,500
• Full kitchen wall removal: S$1,500 to S$3,000

Adding up to mid-range S$3,000 for a moderate hack scope.

Painting

A 4-room flat takes 3 to 5 days to paint properly. Mid-range pricing is around S$2,800 for two coats including ceiling. Premium with feature walls, accent colours, or designer paint brands (Little Greene, Nippon Hydro Pro) goes up to S$4,500.

Air-conditioning

For HDB BTO, this is usually 3 to 4 fan-coil units off a single condenser ledge. 2026 baseline 3-tick inverter system: ~S$3,800 fully installed. Higher-efficiency 5-tick systems: S$5,500 to S$8,000.

Hidden costs most quotes don't surface

These are the line items that show up later, after deposit, and often catch homeowners off-guard:

1. Power-point relocations. Each existing point moved is S$80 to S$150. Most quotes count this per point and they add up — a typical 4-room sees 8 to 15 relocations.
2. Tile-on-tile flooring. If you skip hacking and lay new flooring on top, you save S$2,000+ on hacking but add 4 to 8mm to floor height, which can cause door clearance issues. Carpentry must be cut to suit.
3. Quartz top edge profiles. Mitred edges or 2-inch laminated edges look great but cost meaningfully more than standard 20mm edges.
4. Specialty hardware lead times. Aventos lift-up systems, motorised drawers, and pantry pull-outs sometimes have 4 to 6 week lead times. Not a hidden cost so much as a hidden timeline risk.
5. Door upgrades. Replacing the HDB-issued main door with a solid teak or laminate door: S$1,800 to S$3,500. Adding a digital lock: another S$400 to S$900. Most quotes leave this off entirely.

How to spend less without making it look like you did

A few patterns recurring across the projects that look the best for their budget:

• Laminate on the visible fronts, plywood everywhere else. You don't need premium materials on the inside of cabinets.
• One feature wall, not three. Pick the most-photographed wall (usually the TV wall) and put the fluted timber or lacquer there. Keep the rest simple.
• Skip the kitchen island unless you have the footprint. Most 4-room kitchens are 8 to 10 sqm and an island steals walking room. The money goes further in a tall pantry.
• Vinyl flooring throughout, except wet zones. Saves S$8,000+ vs full engineered timber, and looks identical to most visitors.
• Soft-close hardware as standard, no upgrades. Blum and Hettich are the baseline. You shouldn't be paying extra.

What a "good" mid-range 4-room renovation looks like in 2026

A 4-room HDB renovated for around S$55,000 to S$70,000 in 2026, going direct to trades (no ID) with one carpenter handling the full carpentry scope:

• Carpentry (full flat, laminate fronts, Blum hardware, one feature wall): S$18,000
• Flooring (vinyl whole flat): S$6,500
• Electrical re-wiring and additions: S$4,000
• Plumbing additions: S$2,000
• Hacking (one partition + one bathroom): S$3,500
• Painting (two coats, one feature wall colour): S$2,800
• Tiling (kitchen backsplash + 2 bathrooms): S$5,000
• Quartz top (kitchen + 2 vanities): S$2,800
• Aircon (3 fan-coils, 3-tick): S$4,000
• False ceiling (living + kitchen): S$2,500
• Lighting fittings: S$1,800
• Sanitary wares: S$2,500
• Door upgrades, miscellaneous: S$2,800

Total: ~S$58,200 before any contingency. Add 10% contingency and you're at S$64,000.

Where to start

Before getting quotes, sketch out which line items you actually care about. Most homeowners care a lot about kitchen and bathrooms, somewhat about wardrobes, and almost not at all about painting and miscellaneous. Allocate budget to match.

For the carpentry portion — which is the largest line item — WhatsApp Alan with your floor plan and a few reference photos. The quote is in writing within 24 hours, with indicative figures included so you can sanity-check before site visit.

For the broader timeline of how everything sequences together, see the BTO carpentry timeline guide.