HDB Window Replacement Singapore: Your Complete 2026 Guide
HDB window replacement in Singapore requires a BCA-approved, HDB-licensed contractor to apply for a renovation permit before work begins. Most homeowners replace aluminium sliding or casement windows, with costs typically ranging from $400–$900 per window. Home Aluminium has been HDB-licensed and BCA-approved since 2009 — get a free site survey with no GST.
🏛️ Est. Since 2009
15+ years of HDB window experience
✅ HDB-Licensed Contractor
Approved to work in all HDB flats
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🔖 BCA-Registered
Certified & qualified team
Why Do Singapore Homeowners Replace Their HDB Windows?
Old or damaged windows are more than just an eyesore — they can affect the safety, security, and comfort of your home. Here are the most common reasons Singapore homeowners choose to replace their HDB windows.
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Safety Concerns
Windows older than 10–15 years may have weakened frames or failing hinges — a safety risk, especially on higher floors.
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Water Leakage
Warped frames and failed seals allow rainwater in during Singapore's heavy monsoon season.
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Security Upgrade
Old windows are easier to force open. New windows with quality locking mechanisms provide better protection.
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Pet Safety
Cat owners can upgrade to pet-friendly grilles that prevent cats from squeezing through or falling.
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Noise Reduction
Units near MRT lines or expressways benefit significantly from double-glazed window upgrades.
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Resale Preparation
Fresh windows and grilles improve your HDB's visual appeal and can add value before listing for sale.
HDB Window Replacement Rules & Regulations (2026)
Before replacing your HDB windows, it’s important to understand what HDB allows — and what it doesn’t. Here’s what every Singapore homeowner needs to know.
✅ Only HDB-Licensed Contractors Are Permitted
You cannot engage an unlicensed worker or DIY your window replacement. Doing so voids your HDB warranty and may result in enforcement action.
✅ Bar Spacing Must Be 1.5 to 2 inches (approx. 38mm to 50mm)
Window grilles must have bar spacing of less than 2 inches to prevent pets and children from squeezing through — this is the being the standard recommendation to balance security with clear views.
✅ Grilles Must Not Protrude Beyond the Building Face
All grille bars must remain within the window recess — they cannot extend beyond the outer face of your HDB block.
✅ Approved Materials Only
Aluminium is the standard approved material for HDB window frames and grilles. Wrought iron or steel grilles are less commonly used nowadays.
✅ Colour Must Match Your Block's Scheme
Grilles visible from the exterior must match or complement HDB's prescribed colour scheme for your specific block.
Always verify your contractor is on HDB's directory of licensed contractors before engaging them. Home Aluminium is HDB-Licensed and BCA-Registered — we ensure all works are fully compliant with current HDB regulations.
How to Apply for HDB Window Replacement Approval
The process is simpler than most homeowners expect — especially when you engage a contractor who handles the paperwork for you.
Identify Window Type
Confirm if prior HDB approval is required for your specific window type.
Free Site Survey
Contractor visits, measures, and advises — no obligation, no charge.
HDB Submission
All documentation submitted to HDB on your behalf.
Approval Received
Schedule installation once HDB gives the green light.
Installation Day
HDB Window Replacement Cost Singapore (2026 Price Guide)
Prices vary depending on window type, size, and the total number of windows in your flat. Here’s a comprehensive guide to help you budget — and remember, we offer free site surveys with itemised quotes, so there are no surprises.
Window Type | Estimated Price Range | Best For | Notes |
|---|---|---|---|
Sliding Window (per panel) | $200 – $500 | Living rooms, bedrooms | Most common HDB window type |
Casement Window (per unit) | $300 – $600 | Bedrooms, main windows | Better sealing & ventilation |
Top Hung Window (per unit) | $150 – $350 | Kitchens & bathrooms | Rain-resistant opening |
Double Glazed Window (per unit) | $600 – $1,200 | MRT / road-facing units | Premium noise reduction |
Full 3-Room HDB (all windows) | $1,500 – $3,000 | Complete flat replacement | Depends on window types selected |
Full 4-Room HDB (all windows) | $2,000 – $4,500 | Complete flat replacement | Depends on configuration |
Full 5-Room HDB (all windows) | $3,000 – $5,500 | Complete flat replacement | Depends on configuration |
* All prices are estimates based on standard window sizes. A free site survey will provide an accurate, itemised quote for your specific unit. No GST applicable.
Get Your Exact Quote — Free Site Survey
Types of Windows Available for HDB Flats
Not all windows are the same. Different window types suit different rooms, orientations, and budgets. Explore our detailed guides for each type.
Sliding Windows
Sliding Windows are perfect for corridors and rooms, space-saving and easy to use.
Casement Windows
Aluminium casement windows are hinged on one side. Can open on the right or left side.
Louvre Windows
Louvre windows are often installed in bathrooms to provide ample ventilation & privacy.
Top Hung Windows
Top Hung Windows act like an awning to protect from rain while enjoying cool air.
Double Glazed Windows
Double glazed windows are sound-proof and good for keeping yourself cool indoors.
How to Choose the Right HDB Window Contractor
With many contractors in Singapore, here’s your checklist to ensure you’re engaging a qualified, trustworthy professional.
✅ Verify HDB licence number on HDB's official contractor directory
✅ Confirm BCA (Building & Construction Authority) registration
✅ Read independent reviews on Google & Facebook — not just the website
✅ Ask for a free site survey — reputable contractors don't charge
✅ Request a clear, itemised written quotation — no vague "all-in" prices
✅ Confirm installation completes in 1 day for standard HDB flats
✅ Check if they handle HDB paperwork and permit submissions for you
✅ No hidden costs should be charged — confirm upfront
Our Window Replacement Process — What to Expect
From your first call to the final walkthrough — here’s exactly what happens when you work with Home Aluminium.
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Frequently Asked Questions About HDB Window Replacement
Everything Singapore homeowners commonly ask — answered clearly.
Do I need HDB approval to replace my windows?
Yes — a renovation permit is required. Only a BCA-approved contractor listed in HDB’s directory can apply for this on your behalf. Replacing like-for-like windows in the same position generally does not require prior HDB approval. However, any structural change or addition of new window openings may require written approval. Home Aluminium assesses this at the free site survey and advises you accordingly — we handle all submissions on your behalf.
How long does HDB window replacement take?
Most jobs are completed within a single day. Permit application is handled by us prior to works commencing. For a standard 3- or 4-room HDB flat, installation typically takes one full working day. Larger units or more complex configurations may take up to two days. We confirm the exact timeline when we provide your quotation.
How much does it cost to replace HDB windows in Singapore?
Typically $400–$900 per window depending on type and size. A full flat replacement ranges from $2,000–$5,000+. We provide a free site survey and transparent quote with no hidden fees. Home Aluminium provides free site surveys with clear, itemised quotes — no surprise charges and no GST.
Can I replace my HDB windows myself?
No. HDB regulations require all window replacement works to be carried out by a BCA-approved contractor. DIY window replacement can result in fines of up to $10,000.
What is the difference between HDB-licensed and BCA-approved?
HDB-licensed means the contractor is specifically approved by HDB to carry out renovation and replacement works in HDB flats. BCA-registered means they are registered with the Building and Construction Authority as a qualified building contractor. Home Aluminium holds both qualifications.
Do you provide dismantling and disposal services for old windows?
Yes, we provide a complete end-to-end service. Our team will dismantle your existing windows and grilles, and handle the proper disposal at no additional cost when you install or replace new ones with us.
What types of windows can I replace in my HDB flat?
Aluminium sliding, casement, louvre, and top-hung windows are all HDB-approved. Full-height windows are generally not allowed for replacement unless the frame is damaged.
What happens after the window is installed?
our contractor submits the necessary completion documentation to HDB. Home Aluminium handles the full paperwork process for you.
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