Window and door questions

HDB window rules

HDB's windows guide describes three window types found in HDB flats.

HDB's window works guidelines say all window installation or replacement work must be done by an Approved Window Contractor (AWC) listed in HDB's directory, so start with a window contractor HDB has listed. As a flat owner or occupant, you are also responsible for the upkeep of the windows in your flat, or a window could fall and cause serious injury or worse to those below.

Who can repair or replace my windows?

Only contractors approved by BCA and listed with HDB, according to HDB's windows guide. The contractor submits the window permit application to HDB, and within 14 days of completing the works, submits the window report to BCA. You can check the permit status on MyHDBPage. For what an inspection involves, see window safety inspection.

How often should I check my windows?

Once every 6 months. HDB asks you to check that your windows work smoothly and have no loose or worn-out parts. BCA's window safety page sums up the routine as check, clean, change. If you are not confident checking your own windows, engage an approved window contractor to inspect them.

Are there penalties for poorly kept windows?

Yes. HDB says home owners can face penalties if a window falls through lack of maintenance, or if they fail to retrofit casement windows with stainless steel rivets. Have loose or worn-out parts fixed by an approved window contractor before they become a risk. For door and window jobs in general, see door and window repair.

Grilles and window changes

Under HDB's window works guidelines, grille rules depend on when your flat was handed over. In older flats, internal metal grilles of any design at windows and the balcony parapet need no permit, as long as they are fixed internally and do not protrude from the facade. In newer flats, grilles at the balcony parapet and service yard need a permit and an HDB-approved design, shown in the renovation factsheet given at booking or key collection, or on MyHDBPage, so check the handover cut-off on HDB's page before you install any grille. Treat invisible grilles as a grille design and apply the same rules. For the trade-offs, see invisible or traditional grilles.

Can I change my window design?

Only within limits. HDB's window works guidelines say replacing full height windows, including 3/4 height and bay windows, is not allowed, and new windows must match the existing colour scheme, proportion and type. A renovation permit from HDB is required for all window replacement work, and your AWC applies for it.

Do casement windows need new rivets?

Yes, if they still have aluminium rivets at the stays. BCA's window safety page says approved window contractors replace all aluminium rivets at the casement window stays with type 304 stainless steel rivets. If you are not sure whether your casement windows have been retrofitted, ask an approved window contractor to inspect them.

Main doors, closers and locks

HDB's gate and door guide describes the gate as a safety barrier and the main entrance door as a fire safety barrier, and asks you to inspect both regularly. SCDF explains that fire-rated doors minimise fire spread, and uncertified hardware on a fire door may affect its ability to do so. A serial label near the hinges of the door or frame shows its fire rating, for example 30 or 60 minutes.

Why does my main door have a closer?

Because it is fire-rated. HDB's gate and door guide says all fire-rated doors at the entrance of HDB flats have a door closer, a self-closing safety device that must not be removed. Replace the closer if fluid leaks and the door cannot shut on its own. If the door sticks, see door jammed or not closing.

What should a digital lock certificate show?

Since 2024, SCDF requires a digital lockset on a fire door to be certified. On the Certificate of Conformity, the brand and model must match your lock, the lock's fire rating must be at least the door's, a mechanical fail-safe should be stated, with testing to SS 332 or EN 1634-1. Compare a digital or mechanical lock first.

Must a replacement main door be fire-rated?

Yes, if it is along a fire escape route (a door opening onto a passageway such as a staircase or lift lobby). HDB's building works guidelines say the replacement needs an HDB permit and must be half-hour fire-rated, with a self-closing device on the frame and an accreditor's label. See our fire-rated main door comparison.

Where to go next

This window and door FAQ covers common questions about HDB flats. For other small jobs around your home, the handyman FAQ has short answers. If you are choosing a new lock, the price depends on the job, and the digital lock cost guide explains what goes into it. When you are ready to compare companies, browse handymen in the directory, and check whether your job needs an approved window contractor or an HDB permit before you book.

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