“How much will my renovation cost?” is the first question nearly every homeowner asks us during a consultation, and it is also the hardest one to answer with a single number. Two 4-room flats of the same size can end up with renovation bills that are $30,000 apart, simply because of different choices in carpentry, finishes and layout.
In this guide, our team at Han Yong breaks down the realistic HDB renovation cost in Singapore for 2026. You will find typical price ranges by flat type, a room-by-room budget breakdown, the hidden costs that catch homeowners off guard, and practical ways to keep your project on budget without cutting corners on safety or compliance.
HDB Renovation Cost in 2026 by Flat Type
The figures below are typical ranges for a full renovation, based on market data published by Singapore renovation platforms for 2026. They assume a moderate, liveable finish: built-in carpentry, kitchen works, bathroom updates, flooring, painting, electrical works and lighting.
A light cosmetic refresh (painting, vinyl flooring over existing tiles, a few loose furniture pieces) can come in well below these ranges. A fully customised, designer-led project with premium materials can easily exceed them.
Why do resale flats cost more to renovate?
Resale flats usually cost 20–40% more than a comparable BTO because they need work a new flat does not. Old tiles and cabinets must be hacked and removed, ageing wiring often has to be replaced, and bathrooms typically need fresh waterproofing. Hacking alone can account for roughly a fifth of a resale renovation quote, compared to around 10–20% for a BTO. We cover this in detail in our resale HDB renovation guide.
Room-by-Room HDB Renovation Cost Breakdown
Looking at the total figure alone can be misleading. It helps to understand where your money actually goes. Here is how a typical 4-room HDB renovation budget is split across the main categories.
Kitchen renovation cost
The kitchen is usually the single most expensive room in an HDB flat. Most of the spend goes into the top and bottom cabinets, countertop, sink and hob cut-outs, backsplash and plumbing. A complete HDB kitchen typically runs from about $12,000 to $25,000, depending on the cabinet length, laminate or solid surface finishes, and your choice of countertop material (quartz, sintered stone or solid surface). Explore our kitchen renovation services to see what a well-planned kitchen can look like.
Bathroom and toilet renovation cost
A standard HDB bathroom remodel usually costs $5,000 to $10,000 per bathroom. That covers new wall and floor tiles, waterproofing, a new WC, basin, tapware and a shower screen. Bathroom fixtures alone can cost $1,300 to $2,600 per bathroom, and more if you choose premium brands or a rain shower system.
If your BTO flat is less than three years old, HDB does not allow you to remove the original bathroom wall and floor tiles. Overlaying new tiles on top is the usual workaround. Read our HDB toilet makeover essentials and check out our HDB toilet renovation projects for ideas.
Living room and bedroom cost
For the living room, most budgets go into the TV feature wall, false ceiling with cove lighting, flooring and storage. Expect $5,000 to $15,000 depending on the design complexity. See our living room renovation portfolio for inspiration.
In bedrooms, the main cost is the wardrobe. A full-height built-in wardrobe is usually priced per foot run, and a master bedroom wardrobe with sliding doors can range from $3,000 to $7,000. Our master bedroom layout tips can help you plan storage before you commit to carpentry.
What Affects Your HDB Renovation Cost?
Every renovation quotation is shaped by the same handful of factors. Understanding them lets you decide where to spend and where to save.
Flat type and age: Older flats need more hacking, rewiring and plumbing replacement. New BTOs are a blank canvas with fewer surprises.
Scope of works: Moving walls, relocating the kitchen or shifting toilet fittings adds hacking, permits and wet works.
Carpentry volume: Carpentry is priced by foot run. Every extra cabinet, feature wall or platform bed adds up quickly.
Material choices: Laminate vs veneer, homogeneous tiles vs marble, vinyl vs engineered wood, and quartz vs sintered stone can swing your budget by thousands.
Design complexity: Curved carpentry, arches, fluted panels and layered ceilings require more labour and skill.
Electrical load: If your flat still has a 30-amp main switch, upgrading to support modern appliances and air-conditioning costs extra.
Contractor vs interior design firm: Premium design firms charge more for design services. A direct, experienced contractor can deliver the same build quality with fewer layers of mark-up.
Hidden Costs Most Homeowners Forget
Many renovation budgets go off track not because of the main works, but because of the small items nobody planned for. Watch out for these:
Rewiring: Full rewiring in an older flat typically costs $2,000 to $5,000, and more for flats over 30 years old. HDB notes that PVC electrical cables have an average lifespan of about 25 years.
Waterproofing: Replacing bathroom tiles in an older flat means applying a new waterproofing membrane, which is required under HDB guidelines.
Debris disposal and haulage: Often listed separately in quotations.
Floor protection and cleaning: Protecting lifts, corridors and floors and a final chemical wash.
Air-conditioning: Usually bought separately, plus trunking and installation by a BCA-trained installer.
Appliances and loose furniture: Hob, hood, oven, fridge, washer, sofa, bed frame and dining set can add $10,000 to $25,000.
Curtains, blinds and lighting fittings: Easily another $2,000 to $5,000.
Variation orders: Changes made mid-project are one of the biggest causes of budget blowouts.
How to Budget for Your HDB Renovation
A good renovation budget is built in layers. Here is the approach we recommend to clients during our consultation phase.
Start with your total available funds. Include cash savings, renovation loan amount and a buffer for furniture and appliances.
Separate “must-have” works from “nice-to-have” works. Essential items like electrical safety, waterproofing and kitchen cabinets come first.
Set aside a contingency of 10–15%. For resale flats, aim for the higher end because hidden defects often appear only after hacking begins.
Request itemised quotations. Compare at least three contractors on the same scope so you can see real differences in pricing.
Lock in your design before work starts. Every change during construction becomes a variation order with its own cost.
Paying for your renovation
Most Singapore homeowners fund their renovation with a mix of savings and a renovation loan. Bank renovation loans are capped at six times your monthly income or $30,000, whichever is lower, with repayment periods of one to five years. For a 4-room flat, that usually means a renovation loan covers only part of the bill, and the rest must come from savings. Renovation loans are typically paid directly to the contractor based on the submitted quotation.
At Han Yong, we discuss a milestone-based payment schedule with every client before work begins, so you know exactly how much to pay and when. This gives you time to arrange your funds without stress.
Practical Ways to Save on HDB Renovation Cost
Saving money does not have to mean a lower-quality home. These are the strategies we see work best:
Keep the existing layout. Avoid moving the kitchen sink, toilet bowls or major walls unless it truly improves daily living.
Overlay instead of hacking. Vinyl or tile overlays over existing flooring can save thousands on hacking and debris disposal, as long as HDB thickness limits are respected.
Mix built-in and loose furniture. Use carpentry only where storage needs to be custom-fitted, and buy freestanding pieces elsewhere.
Choose mid-range finishes in low-impact areas. Spend on the kitchen countertop and wardrobe interiors; save on the study room or storeroom.
Plan lighting early. Adding points after carpentry is done is far more expensive.
Work with an HDB-licensed contractor. Getting permits right the first time avoids costly reinstatement if works are found to be unauthorised.
Why Work With an HDB-Licensed Contractor
Renovating an HDB flat is not just about design. Certain works, such as hacking walls, replacing floor tiles or changing bathroom finishes, need an HDB permit, and only contractors listed in the HDB Directory of Renovation Contractors can apply for one. If permit-required works are carried out without approval, HDB can ask you to reinstate the flat to its original condition at your own cost.
Han Yong Building Renovation Contractor has been HDB-licensed (licence no. HB-02-0289A) for over a decade. Through our four-step plan of Consult, Propose, Develop and Reveal, we give every client a Letter of Agreement with itemised costs, a realistic timeline and a milestone payment schedule, with no hidden charges once work begins. Learn more about our team or see our HDB renovation projects.
If you are still deciding on a contractor, our article on what makes a good renovation contractor in Singapore is a useful checklist. And if you are thinking long term, see how a well-planned renovation affects property value in Singapore.
Frequently Asked Questions
How much does it cost to renovate a 4-room HDB flat in 2026?
A full renovation for a 4-room BTO flat usually costs about $50,000 to $62,000, while a 4-room resale flat typically costs $64,000 to $82,000. Your final cost depends on carpentry volume, material choices and how much hacking or rewiring is needed.
Is $30,000 enough to renovate an HDB flat?
Yes, $30,000 can be enough for a 3-room BTO or a light renovation of a larger flat, covering flooring, painting, a basic kitchen and essential electrical works. It is usually tight for a full 4- or 5-room renovation with built-in carpentry throughout.
Why is resale HDB renovation more expensive than BTO?
Resale flats need extra work such as hacking old tiles and cabinets, rewiring ageing electrical systems, replacing old pipes and redoing bathroom waterproofing. These items typically add 20–40% to the cost compared with a new BTO of the same size.
Which part of an HDB renovation costs the most?
Carpentry is usually the largest single item, often taking up 28–35% of the total budget. The kitchen is generally the most expensive room because it combines carpentry, countertops, plumbing, tiling and electrical works.
How much should I set aside for contingency?
Set aside 10–15% of your renovation budget. Resale flats should lean towards 15% because hidden issues like water seepage, damaged screed or faulty wiring often only appear after hacking starts.
Can I use CPF to pay for HDB renovation?
No, CPF savings cannot be used to pay for renovation works. Most homeowners use cash savings, and many supplement this with a bank renovation loan of up to six times their monthly income, capped at $30,000.
How long does an HDB renovation take?
A typical full HDB renovation takes around 8 to 12 weeks, depending on scope. HDB requires permit-approved works to be completed within three months for new flats and one month for existing flats from the date the permit is granted.
