Open Concept Kitchen for HDB: Pros, Cons and Costs
Converting a HDB kitchen to open concept costs between $8,000 and $25,000, depending on the extent of hacking, ventilation upgrades, and finishes. You'll need HDB approval before removing any walls, even non-structural partitions. The main expenses are hacking ($800-$3,500), electrical and plumbing relocation ($1,500-$4,000), a powerful hood system ($1,200-$5,000), and making good works like flooring, plastering, and repainting ($2,500-$8,000). Factor in 2-3 weeks for the structural work alone, plus another 3-4 weeks for kitchen fitting and finishes.
What HDB Allows for Open Concept Kitchens
HDB has specific rules about kitchen alterations. You cannot remove walls between the kitchen and any bedroom or bathroom—these partitions must remain to prevent moisture and odours from affecting sleeping areas. You can, however, remove or partially hack the wall between the kitchen and the living or dining area, which is the most common open concept layout.
Before any hacking begins, you must submit a renovation application to HDB through the HDB Renovation Portal. This includes a floor plan showing which walls you intend to remove. HDB will assess whether the wall is structural. Most kitchen partition walls in HDB flats built after the 1980s are non-structural, but older estates may have load-bearing elements. If your wall is structural, you'll need a Professional Engineer (PE) report confirming it can be safely removed or altered, and you'll likely need to install a steel beam or column to redistribute the load—adding $3,000-$8,000 to your budget.
Even for non-structural walls, you must engage a HDB-licensed contractor (like Larry Contractors, HB-09-5667H) to perform the hacking. DIY hacking is strictly prohibited and will result in fines and a stop-work order. The entire renovation must be completed within the three-month approval window, though extensions can be requested if needed.
Pros and Cons of an Open Concept HDB Kitchen
Advantages
- Perceived space: Removing the wall makes a 4-room or 5-room flat feel significantly larger. A typical 4-room HDB kitchen is 6-8 sqm; opening it to the living area creates a combined 30-35 sqm space that feels more spacious and airy.
- Natural light: Light from the kitchen window now reaches the living area, reducing daytime reliance on artificial lighting and improving the overall ambience.
- Social cooking: You can interact with family or guests while preparing meals, rather than being isolated behind a wall. This is especially valued by families with young children.
- Flexible layouts: You gain freedom to add an island, breakfast bar, or peninsula counter, which can serve as extra prep space, dining, or a boundary between zones.
- Resale appeal: Open concept layouts are in demand, particularly among younger buyers and families upgrading from BTO flats, potentially boosting resale value by 3-5%.
Disadvantages
- Cooking odours: Without a wall, smells from stir-frying, deep-frying, or strong spices will spread throughout the flat. You must invest in a high-capacity hood (at least 1,000 m³/h suction) and possibly an air purifier.
- Noise: Blenders, exhaust fans, washing dishes, and general kitchen clatter are no longer contained. This can be disruptive during early mornings or late nights.
- Visible mess: An enclosed kitchen hides clutter and dirty dishes. An open kitchen is always on display, requiring more frequent tidying and discipline.
- Higher cooling costs: Your air-conditioning now has to cool a larger combined space, increasing electricity consumption by roughly 15-20% compared to cooling just the living area.
- Reduced storage: Removing a wall often means losing upper or lower cabinets attached to it, reducing total kitchen storage by 1-2 linear metres unless you compensate elsewhere.
Cost Breakdown by Scope of Work
The total cost depends heavily on how much of the wall you remove, the condition of your existing kitchen, and the quality of finishes you choose. Here's a detailed breakdown based on 500+ projects we've completed:
| Item | Scope | Cost Range (SGD) |
|---|---|---|
| Hacking | Half-height wall (1.2m high, 3m long) | $800 - $1,500 |
| Hacking | Full-height wall removal (2.6m high, 3m long) | $1,800 - $3,500 |
| Debris removal | Per truck load | $150 - $300 |
| Electrical relocation | Relocate switches, add island power points | $800 - $2,000 |
| Plumbing | Relocate sink to island (if applicable) | $1,200 - $2,500 |
| Hood and hob upgrade | High-suction hood (1000+ m³/h) + ducting | $1,200 - $5,000 |
| Flooring make-good | Patch tiles or extend vinyl (5-8 sqm) | $600 - $2,000 |
| Plastering and painting | Patch and repaint adjacent walls and ceiling | $800 - $2,500 |
| Kitchen island or counter | Custom-built, 2m length (optional) | $2,500 - $6,000 |
| Replacement cabinets | If storage is lost (per linear metre) | $800 - $1,500 |
A typical 4-room HDB open concept kitchen conversion with half-height hacking, modest finishes, and a new island comes to roughly $12,000-$18,000. A full-height wall removal with high-end appliances, quartz countertops, and extensive make-good work can reach $22,000-$25,000.
Ventilation and Odour Management Solutions
The single biggest concern homeowners raise about open kitchens is odour control, especially in Singapore where heavy wok cooking and deep-frying are common. Your existing hood—typically a basic 600-700 m³/h model—won't cut it. You need at least 1,000 m³/h suction, and ideally 1,200-1,500 m³/h if you cook frequently or do a lot of stir-frying.
Hood Types and Performance
Island hoods are necessary if you're building an island with a hob. They're more expensive ($1,800-$5,000) because they require ceiling-mounted ducting and higher suction to compensate for open airflow from all sides. Wall-mounted hoods are more affordable ($800-$2,500) and efficient because they're partially enclosed, but they limit your layout options.
Always choose a ducted hood over a recirculating (charcoal filter) model. Recirculating hoods don't expel air outside; they merely filter and return it, which is inadequate for open layouts. Ducted hoods vent directly to the external shaft, removing odours entirely. Check that your HDB unit's existing duct can handle the increased airflow—older flats sometimes have undersized or partially blocked ducts that need cleaning or enlargement.
Additional Ventilation Strategies
- Ceiling fans or air circulators: Position a fan to push air toward the hood, improving capture efficiency and preventing odour from drifting to bedrooms.
- Portable air purifiers: A HEPA + activated carbon unit ($300-$800) placed in the living area can catch any residual smells that escape the hood.
- Positive pressure in bedrooms: Keep bedroom doors slightly closed and use an air purifier or small exhaust fan to maintain slight positive pressure, preventing kitchen air from entering.
- Cook with lids: Simple habit change—using pot and pan lids reduces airborne grease and steam by roughly 40%.
Design Considerations and Layout Tips
Once the wall is gone, you have flexibility, but you also need to thoughtfully divide the kitchen and living zones without losing the open feel. Here are practical layout approaches based on our completed projects:
Half-Height Walls and Partitions
Instead of full removal, hack the wall down to 1.0-1.2m height, leaving a ledge that can serve as a breakfast bar or display shelf. This preserves some visual separation, hides lower cabinet clutter, and costs 40-50% less than full removal. It's especially popular in 3-room and 4-room flats where full removal can feel too open and lose definition.
Kitchen Islands and Peninsulas
A 2m x 0.9m island provides 1.8 sqm of additional worktop and can house the hob, sink, or simply serve as prep and dining space. Ensure at least 1.0-1.2m clearance on all working sides for comfortable movement. If space is tight, a peninsula (attached to existing counters) saves 0.8-1.0m of floor area while offering similar function.
We fabricate islands at our Kaki Bukit carpentry factory using moisture-resistant plywood carcasses and your choice of laminate, quartz, or sintered stone tops. Custom sizing means we optimise every centimetre for your layout, unlike mass-market modular units that force compromise.
Flooring Transitions and Visual Boundaries
If your kitchen currently has tiles and your living area has vinyl or laminate, removing the wall exposes the junction. You can either extend one flooring type across the entire area ($600-$1,500 for 10-15 sqm) or use the material change as a deliberate boundary. A neat tile-to-vinyl transition strip ($50-$120 supply and install) creates a clean line without a physical barrier.
Timeline and Renovation Sequence
An open concept kitchen conversion follows a strict sequence to avoid rework and ensure HDB compliance. Here's the week-by-week breakdown:
Week 1: Hacking and Demolition
Protection of floors and existing fixtures, hacking of the wall, debris removal, and initial cleaning. Noise and dust are significant—neighbours must be notified, and hacking is only allowed Monday to Saturday, 9am to 5pm, per HDB rules.
Week 2: Making Good and First Fixes
Plastering exposed edges, patching ceiling and floor, relocating electrical points and plumbing if needed. This is also when any structural reinforcement (if required) is completed.
Week 3-4: Finishes and Kitchen Installation
Painting, flooring installation or patching, fitting new cabinets, countertops, and the upgraded hood. Plumbing and electrical final connections, testing of all systems.
Week 5-6: Final Touches and Inspection
Installation of island or peninsula, backsplash tiling, grouting, caulking, and final cleanup. A HDB inspection may be scheduled if structural work was involved, though most non-structural hacking doesn't require a final inspection—just submission of completion photos via the portal.
Total downtime for kitchen use is roughly 3-4 weeks, though you can often continue limited cooking after week 2 if the hob and sink remain functional.
Frequently Asked Questions
Can I remove the entire kitchen wall in a 3-room HDB flat?
Yes, as long as the wall separates the kitchen from the living or dining area, not a bedroom or bathroom. However, 3-room flats (60-65 sqm) are compact, and full removal can make the space feel undefined. A half-height wall or a peninsula layout usually works better, preserving some separation while opening sightlines and light. Budget $10,000-$16,000 for a typical 3-room conversion including hacking, making good, and a modest counter extension.
Do I need a PE report for hacking a kitchen wall in a resale HDB flat?
Only if the wall is structural. Most kitchen partition walls built after the 1980s are non-structural masonry or lightweight partitions. HDB's renovation application system will flag if a PE report is required. If flagged, a licensed PE will visit, assess the structure, and issue a report ($800-$1,500). Older estates—particularly pre-1980 blocks—are more likely to have structural elements, so always submit your plan to HDB before starting work.
How much more powerful does my range hood need to be for an open kitchen?
Aim for at least 1,000 m³/h extraction rate, compared to the 600-700 m³/h typical in enclosed kitchens. If you cook daily with a wok or do frequent deep-frying, go for 1,200-1,500 m³/h. Higher suction means faster odour and grease removal before it spreads. Pair this with a ducted system venting to the external shaft—never rely on recirculating hoods in an open layout, as they simply can't keep up with Singapore-style cooking.
Will an open concept kitchen affect my HDB resale value?
Generally, yes—positively. Open layouts are popular among younger families and first-time upgraders, and flats with modern, well-executed open kitchens tend to command a 3-5% premium over comparable units with enclosed kitchens, particularly in mature estates. However, execution matters: a poorly ventilated or visually cluttered open kitchen can deter buyers. Invest in quality finishes, adequate ventilation, and tidy built-ins to maximise appeal.
Can I reverse an open concept kitchen back to enclosed if I change my mind?
Yes, but it's costly. Rebuilding a partition wall involves framing, plastering, painting, patching flooring, and reinstalling electrical points—typically $3,000-$6,000 depending on wall length and finishes. You'll also lose the countertop or island investment. It's rare for homeowners to reverse once completed, but if you're uncertain, start with a half-height wall or sliding partition (e.g., glass or aluminium-framed doors) that offers flexibility without permanent commitment.
Ready to Open Up Your HDB Kitchen?
An open concept kitchen transforms how you use your flat, making it feel larger, brighter, and more social—but only if it's done right. At Larry Contractors, we've completed over 500 projects since 2009, and we handle every step in-house: HDB applications, hacking, making good, custom carpentry from our Kaki Bukit factory, and final finishes. You deal directly with us, no middlemen, no markups. We'll walk you through the approval process, give you transparent pricing upfront, and deliver a kitchen that works for how you actually cook and live. Get a free, no-obligation quote and consultation via WhatsApp at https://wa.me/6591072601—send us your floor plan and photos, and we'll give you a detailed breakdown within 24 hours.