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An HDB kitchen renovation in Singapore is shaped by three things: the layout your flat allows, HDB's rules on hacking, wet areas and gas, and the carpentry that usually makes up most of the cost. Plan those in that order. Fix the layout and services first, confirm what needs approval, then order cabinets, because changes after the carpentry is made are expensive in a compact kitchen.
This guide covers layout options, the HDB rules that apply to kitchens, a typical timeline and what drives the price. If you are renovating more than the kitchen, our HDB renovation page explains how we handle whole-flat projects.
HDB kitchen layout options
Most HDB kitchens are galley or L-shaped, with the sink, hob and service yard in fixed positions. Here is how the common layouts compare:
| Layout | Suits | Strengths | Watch out for |
|---|---|---|---|
| Galley (two parallel runs) | Narrow kitchens in 3-room and 4-room flats | Efficient workflow, lots of counter and storage for the space | Tight walkway if both runs have deep cabinets |
| Single wall | Very narrow kitchens, studio apartments | Simplest and cheapest carpentry | Limited counter space; plan tall units for storage |
| L-shaped | Squarer kitchens, many 4-room and 5-room flats | Good corner storage, room for a small table | Corner cabinets need proper fittings or space is wasted |
| U-shaped | Larger kitchens and older flats with bigger kitchens | Maximum counter and storage | Can feel enclosed; check walkway width |
| Open or semi-open | Owners who want the kitchen to join the living area | Brighter, more sociable space | Needs HDB approval for wall works; smoke, smell and grease travel. Glass sliding doors are a common compromise |
| With island or peninsula | Open-concept flats with enough floor area | Extra prep space and seating | Moving water or power to an island adds plumbing and electrical work |
Before choosing an open layout, confirm whether the wall can be removed at all, and how you will deal with cooking fumes. A strong hood and a glass partition you can close often work better than a fully open plan for heavy cooking.
HDB rules for kitchen renovation
HDB's renovation guidelines apply to kitchens because they involve walls, wet areas and gas. The main points:
- Permits for hacking. Removing or hacking walls needs an HDB renovation permit, applied for by a contractor on HDB's Directory of Renovation Contractors. Structural walls, columns and beams cannot be removed, and household shelter walls cannot be hacked or drilled into.
- New flats: three-year rule. For a new flat, HDB does not allow the floor and wall tiles of the kitchen and bathrooms to be hacked for the first three years, to protect the original waterproofing.
- Wet-area works. If the kitchen floor finish is redone, waterproofing must be dealt with properly so water does not leak to the flat below.
- Gas. Gas pipes can only be altered by a licensed gas service worker, and hob positions are limited by where the supply can safely run.
- Windows. Kitchen window replacement must be done by an approved window contractor.
- Working hours. Noisy works such as hacking and drilling are restricted to HDB's permitted hours and are not allowed on Sundays and public holidays.
These rules are updated from time to time, so check HDB's current renovation guidelines for your flat. We handle the HDB permit applications as part of the job. Our guide to HDB renovation rules and permits covers the wider rules.
Plumbing, gas and electrical
Kitchen cost rises quickly when the sink, floor trap or gas point has to move. In older flats, corroded concealed pipes often only show up after hacking, so keep a contingency if your flat is more than 20 years old. Our plumbing services team handles pipe replacement during the renovation.
Electrical load matters too. Ovens, induction hobs, dishwashers and several small appliances may need new circuits or a distribution board upgrade. Plan power points around how you actually cook, with electrical services designed before the cabinets are drawn.
Carpentry and material choices
Kitchen carpentry is usually the largest line item. The cost depends on the length of cabinets, top and bottom cabinets versus floor-to-ceiling tall units, internal drawer systems, soft-close hardware, and the countertop material: laminate, solid surface, quartz or sintered stone.
Choose materials for humidity and daily wear. HDB kitchens work hard, and low-grade boards near the sink and dishwasher often swell within a few years. Our carpentry services page covers cabinet materials and finishes.
Typical HDB kitchen renovation timeline
The kitchen is usually paced by the carpentry, because cabinets take about three to four weeks to fabricate after the design is confirmed. The rest of the works are sequenced around that.
| Stage | What happens | Notes |
|---|---|---|
| Design and site measurement | Layout, appliances, power points and finishes agreed | Lock the design here; changes later are costly |
| Permits | HDB permit for hacking or wall works, if needed | Applied for by the contractor before work starts |
| Hacking and disposal | Old cabinets, tiles and walls removed | Noisy works only in permitted hours |
| Plumbing, gas and electrical rough-in | Pipes, gas point and wiring in their new positions | Hidden pipe problems appear here |
| Waterproofing and tiling | Floor and wall tiles, waterproofing where the floor is redone | |
| Carpentry installation | Cabinets installed once fabricated | Installation itself takes about one to two days |
| Countertop | Templated after base cabinets are in, then fabricated and installed | Measuring before cabinets are level causes gaps |
| Appliances, painting and handover | Hob, hood, sink and appliances fitted, touch-ups, final check |
If the kitchen is part of a wider flat renovation, a standard HDB renovation with carpentry and wet areas commonly runs around one to two months. Our renovation timeline guide explains what speeds projects up and slows them down.
What drives HDB kitchen renovation cost
- Scope. A cabinet and countertop refresh costs far less than a full strip-out with new tiles and layout changes.
- Layout changes. Moving the sink, floor trap or gas point, or opening the kitchen up, adds hacking, plumbing, permits and making good.
- Carpentry volume and grade. Total cabinet length, tall units, internal fittings and hardware quality.
- Countertop. Laminate is the most affordable; solid surface, quartz and sintered stone cost progressively more, and cut-outs and edge profiles add to it.
- Tiles and waterproofing. Retiling the floor and walls, and waterproofing if the floor is redone.
- Pipes and electrics. Replacing old pipes, adding circuits, upgrading the distribution board.
- Appliances. Whether hob, hood, oven and sink are in the contractor's scope or bought separately.
For the wider cost picture and how to compare kitchen quotes, see our kitchen renovation cost guide. Lock your layout and specification before signing, because mid-project changes in a small kitchen are expensive.
Bottom line
HDB kitchen renovation in Singapore works best when layout, services and carpentry are planned as one package. Pick a layout your flat allows, confirm the HDB rules early, avoid moving pipes and gas unless it is worth it, and spend on durable materials where water and heat hit hardest. For an itemised quote, WhatsApp us your floor plan and photos, or arrange a free site visit through our HDB renovation page.
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