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 — see our laminate guide for what holds up in Singapore humidity), 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. Before any carpentry starts, walk the flat with the BTO defects checklist — anything you miss at key collection becomes your problem (and your carpenter's problem) later.