How Much Does HDB Window Replacement Cost in Singapore?
HDB window replacement in Singapore usually starts from about $1,800 for smaller 3-room resale flats and can go above $3,900 for larger 5-room flats, depending on window size, window type, aluminium frame and number of panels. Sliding windows are usually more space-saving, while casement windows provide stronger ventilation and tighter sealing. For HDB flats, window replacement works require a renovation permit and must be carried out by a BCA Approved Window Contractor listed with HDB.
Many HDB flat owners replace their windows when they are around 15 to 20 years old or start showing visible signs of wear and tear. Common problems include water leakage, condensation, rusted hinges, loose handles, or windows becoming difficult to open and close.
Some homeowners upgrade their HDB windows because the current design looks outdated. It may also no longer match their renovated home interior.
Estimated Full-House HDB Window Replacement Cost in Singapore:
| HDB Flat Type | Estimated Replacement Cost |
| 3I / NG | From $1,800 |
| 4NG | From $2,600 |
| 4S | From $2,400 |
| 4A | From $3,200 |
| 5I | From $3,600 |
| 5A | From $3,900 |
These prices are estimated resale full-house replacement package prices. Final pricing depends on actual site measurements, window type, frame selection, glass type, number of panels, grille requirements and installation conditions.
Most Common Window Types for HDB Flats
The two most common HDB windows in Singapore are sliding windows and casement windows.
Sliding windows save space because they do not need room to swing outward. This makes them a good choice for compact areas like kitchens and bedrooms. However, sliding windows usually open up to around 70% only.
Casement windows open outward fully and generally provide better ventilation and soundproofing due to their tighter sealing against the window frame. Many homeowners also prefer casement windows for their cleaner and more modern appearance.
Additional Cost Factors
Window Grilles
Adding window grilles will increase the overall replacement cost. For a standard 4-room HDB flat, aluminium grilles usually cost around $1,250. The final cost depends on the design and material.
Besides improving safety, window grilles also provide added peace of mind for families with young children and pets. Many homeowners now choose slim, modern grille designs or pet-friendly grilles. They want a cleaner look while keeping ventilation and safety.
Double Glazed Window Upgrades
Some homeowners upgrade to double glazed windows for better soundproofing and indoor comfort.
Double-glazed windows reduce outside noise. They work well for homes near MRT tracks, roads, playgrounds, or construction sites. They also help reduce heat transfer and improve indoor comfort.
How Long Can HDB Windows Last?
Most HDB aluminium windows can last around 15 to 20 years with proper maintenance. However, homeowners should replace windows sooner if they notice visible damage. These may include water leaks, rusted hinges, loose handles, condensation, or trouble opening and closing them.
Why Many Homeowners Choose Aluminium Windows
Aluminium windows are a popular choice in Singapore because they are durable, moisture resistant, and suit the local weather.
Modern aluminium frames are also easy to maintain and available in both sliding and casement designs. Many homeowners prefer aluminium windows because they create a cleaner and more updated appearance for HDB flats.
Why Choose a BCA Approved Window Contractor?
For HDB flats, window replacement works require a renovation permit from HDB. The permit must be applied for by a BCA Approved Window Contractor listed in HDB’s Directory of Renovation Contractors before works can begin. HDB states this clearly in its window works renovation guidelines. ZGH Aluminium is an HDB and BCA approved window contractor in Singapore, helping homeowners replace their HDB windows safely and in line with HDB requirements.
Proper installation matters because poor work can cause water leaks, loose hinges, alignment problems, or long-term safety risks. An experienced BCA-approved contractor helps ensure the windows meet HDB safety rules. They also install them correctly for long-term durability.
What Is Usually Included in an HDB Window Replacement Quote?
An HDB window replacement quote usually include:
- Site measurement
- Window supply
- Aluminium frame selection
- Sliding or casement window fabrication
- Glass selection
- Removal of existing windows
- Installation labour
- Permit handling
- Final checks after installation
Frequently Asked Questions
How much does HDB window replacement cost in Singapore?
HDB window replacement in Singapore can start from around $1,800 for smaller 3-room resale flats and go above $3,900 for larger 5-room flats. The final cost depends on the flat type, window size, number of panels, aluminium frame, glass type and site requirements.
Which is better: sliding window or casement window?
Sliding windows are more space-saving and easier to maintain. Casement windows usually provide better ventilation and tighter sealing against rainwater and outside noise.
How long do HDB windows last?
Most HDB aluminium windows can last around 15 to 20 years with proper maintenance.
Are double glazed windows worth it in Singapore?
Double glazed windows help homeowners who want better soundproofing and indoor comfort. They are useful near noisy roads or MRT tracks.
Do I need a BCA approved contractor for window replacement?
Yes. HDB window replacement works require a renovation permit, and the permit must be applied for by a BCA Approved Window Contractor listed with HDB before works begin.
Contact Us for a Free Quotation
If you plan to replace your HDB windows, our team can suggest the best window type. We base this on your layout, ventilation needs, and budget.
At ZGH Aluminium, we offer expert window replacement for HDB flats across Singapore. We use high-quality aluminium windows and grilles. Contact us today for a free site visit and quotation.
