Creating an open concept kitchen HDB space depends entirely on one thing: whether the wall between your kitchen and living area is structural. If it is, no permit in the world will let you remove it. If it isn’t, you’ll still need HDB approval, a registered contractor, and depending on whether you cook with gas there may be limits on how “open” your open concept can actually be.
This guide walks through the rules, the real cost breakdown, and what to do when the wall you want gone turns out to be one you can’t touch.
This matters more in Singapore than the general “open concept is trendy” framing suggests. HDB flats are compact, and a kitchen wall often does double duty — separating cooking smells and noise from the rest of a small living area. Getting the decision right the first time (hack, semi-open, or carpentry-led alternative) avoids the expensive scenario of removing a wall, discovering the smoke and noise trade-off isn’t livable, and needing to reinstate some form of barrier afterward.
Structural vs. Non-Structural Walls: How to Tell
Before planning anything, establish what kind of wall you’re dealing with:
- Check your HDB floor plan. Structural and load-bearing walls are typically indicated on the original approved plan — this is the most reliable starting point, not guesswork.
- Wall thickness is a hint, not proof. Thicker walls are more likely to be structural, but thickness alone isn’t a reliable test — don’t rely on it as your final answer.
- Get a professional check. An HDB-registered contractor or engineer should confirm wall type before you commit to any design that assumes the wall is coming down.
- Household shelter walls are always structural (see the BTO-specific note below) this one is non-negotiable regardless of what the floor plan otherwise suggests.
The HDB Permit Process
Hacking — partial or complete — always requires HDB’s written approval before work begins, even for non-structural partition walls. Two rules apply without exception:
- Only contractors listed in HDB’s Directory of Renovation Contractors (DRC) may carry out the work
- Unauthorised hacking risks fines of up to S$5,000 and an order to reinstate the wall at your own cost
Your contractor submits the floor plan and permit application on your behalf, you shouldn’t need to handle the paperwork yourself. Permit processing through a registered contractor usually takes a few working days once submitted, though we recommend submitting as early as possible in your renovation planning rather than treating it as a last-minute step. For the full permit process and required documentation, see our HDB kitchen renovation permit requirements guide and HDB renovation approval guide.
The BTO-Specific Catch: Household Shelter Walls
If you’re renovating a newer BTO flat, there’s a constraint that catches many homeowners off guard: the household shelter (bomb shelter) wall is always structural, full stop, regardless of thickness or floor plan interpretation. In many BTO layouts, this wall sits directly beside or behind the kitchen, which means a genuinely full, wall-free open concept may not be physically achievable no matter how the permit application is worded.
This isn’t a reason to give up on an open feel it’s a reason to plan the carpentry-led alternatives below from the start rather than as a fallback. If you’re still early in your renovation planning, our BTO renovation timeline guide covers where wall-hacking assessment and permit submission fit into your overall schedule.
Resale flats are generally more flexible here, since older HDB layouts don’t always include a household shelter adjacent to the kitchen but the same structural-wall verification process still applies, and some older resale blocks have their own load-bearing quirks that a floor plan alone won’t reveal.
Gas Hob Fire Safety Restriction
Even when a wall is confirmed non-structural, full open-concept layouts face an additional constraint if you cook with gas: fire safety rules can require the kitchen to remain at least partially enclosed, or impose conditions on how open the layout can be. This is one of the most commonly missed details in open-concept planning homeowners confirm the wall is removable, then discover mid-design that their gas hob setup limits how open the final layout can actually be. Confirm this with your contractor before finalising a design that assumes total wall removal.
Cost Breakdown
Hacking labor only: S$500–900 for a standard non-structural partition wall, covering demolition and debris disposal.
Full open-concept kitchen renovation: S$15,000–40,000, covering hacking, new lighting design for the expanded space, possible appliance relocation, and full carpentry and finishes.
Carpentry-led alternatives — the costs most guides skip entirely:
| Alternative | Estimated Cost Range |
|---|---|
| Peninsula island (extending counter into dining area) | S$3,500–7,000 |
| Breakfast-counter cabinetry (half-wall conversion) | S$2,800–5,500 |
| Glass-and-carpentry hybrid partition (sliding glass + custom cabinet frame) | S$4,000–8,500 |
These figures aren’t padding on top of your hacking or reno budget in many cases, a carpentry-led alternative replaces the need for hacking altogether, which can mean a lower total cost than a full wall-removal renovation once permit delays, structural verification, and reinstatement risk are factored in.
Worth noting: these ranges assume standard HDB kitchen dimensions and mid-range materials. Larger flats, premium finishes, or layouts requiring additional structural verification can push costs toward the higher end of each range your contractor should walk through your specific flat and materials before quoting a firm figure.
When You Can’t Hack: Carpentry-Led Alternatives
If your wall turns out to be structural or you’d simply rather avoid the permit process and potential delays these aren’t consolation prizes. Done well, they achieve the openness effect while solving problems full hacking doesn’t: containing cooking smells, keeping noise down, and giving you a defined boundary that’s still useful storage or counter space.
- Peninsula island: Extends your existing counter into the dining or living area without touching the dividing wall at all. Gives you a visual and functional connection between kitchen and living space, plus extra counter and storage a genuine addition, not just a workaround.
- Breakfast-counter cabinetry: Converts a full wall into a half-wall with a built-in counter on top, often incorporating storage cabinets below. Keeps a visual barrier low enough to preserve sightlines while retaining some odor and mess containment.
- Glass-and-carpentry hybrid partition: Combines a sliding or fixed glass panel with a custom carpentry frame you get the open, connected look of a fully open kitchen while retaining the ability to close it off when cooking something particularly fragrant.
Each of these is a carpentry build, not an architectural change meaning no HDB hacking permit, no structural risk assessment, and typically a shorter timeline than a full wall-removal renovation.
Which alternative fits your flat? As a rough guide: a peninsula island suits flats where the kitchen and dining area are already close together and you want extra counter space more than a visual statement. A breakfast-counter cabinetry conversion works well where you want a clear sightline into the living room but still need some containment for splashes and mess. A glass-and-carpentry hybrid partition is the better fit if you cook frequently with strong aromatics and want the option to close the space off entirely when needed, while still getting the open, connected look the rest of the time. Your contractor should walk through your actual cooking habits and flat layout before recommending one over another a design that looks right in a photo doesn’t always suit how you actually cook.
Semi-Open vs. Full Open: Which Fits Your Flat
If you’re weighing whether a fully open layout is worth the permit process versus a semi-open approach, we’ve covered that comparison in detail separately, see our guides on semi-open vs. open kitchen layouts and semi-open kitchen ideas for Singapore flats for layout-specific guidance.
Managing Odor & Noise in an Open Layout
Whichever route you take, two practical factors matter more once your kitchen opens into your living space:
- Extraction hood placement and power: an underpowered or poorly positioned hood is the single biggest cause of lingering cooking smells in open layouts. This is worth getting right at the carpentry planning stage, not retrofitting later. In an open layout, the hood typically needs more extraction power than an enclosed kitchen would require, since there’s no wall to contain smoke and steam before it disperses into the living area.
- Cabinet material choice: laminate and certain finishes absorb odor more readily than others over time. If you cook frequently with strong aromatics, this is worth discussing with your contractor before finalising cabinet materials, since replacing absorbed-odor cabinetry later is a far bigger job than choosing the right material upfront.
- Working hours for any hacking works: noisy works including demolition and heavy drilling are restricted to 9:00am–6:00pm on weekdays and Saturdays under HDB rules. Factor this into your renovation planning if you’re coordinating around a tight schedule.
Planning an Open Concept Kitchen for Your HDB?
Whether your wall can come down or not, the design decision that actually determines how your kitchen feels day to day is the carpentry not just whether a wall is gone. At La Maison Carpentry, we assess your wall type, permit feasibility, and layout together before recommending a direction, so you’re not choosing between “hack it” and “give up on open” without seeing the carpentry-led alternatives in between.
If you’re planning an open-concept kitchen, book a free consultation with Francis Lee and we’ll assess your specific wall, flat type, and budget before recommending a route.
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FAQs about Open Concept Kitchen HDB
Can I hack my HDB kitchen wall for an open concept?
Only if the wall is confirmed non-structural, and only with HDB’s written approval carried out by an HDB-registered contractor. Structural walls, including household shelter walls, can never be hacked regardless of permit application.
How much does it cost to open up an HDB kitchen?
Hacking labor alone typically costs S$500–900 for a standard non-structural wall. A full open-concept renovation, including hacking, lighting, and carpentry, typically runs S$15,000–40,000 depending on scope.
Can I have an open kitchen with a gas stove?
It depends. Fire safety rules can restrict how fully open a gas-hob kitchen can be, even when the wall itself is non-structural. Confirm this with your contractor before finalising a design that assumes full wall removal.
What if my kitchen wall can’t be hacked?
Carpentry-led alternatives — a peninsula island, breakfast-counter cabinetry, or a glass-and-carpentry hybrid partition can achieve an open, connected feel without touching the wall, often at a lower cost and shorter timeline than a full hacking renovation.