What can I install on my HDB balcony?

HDB balcony rules in brief

Most balcony plans in an HDB flat fall into three groups: things you can add freely, things that need a permit, and things that are off the table. HDB's window works guideline covers grilles, blinds and films, and its important information on renovations rules out awnings installed outside the flat.

After getting the permit, you and your contractor must display the Notice of Renovation outside the flat until all renovations are completed, as HDB's important information on renovations sets out. Works must be completed within 3 months of the permit date for newly completed blocks, 1 month for existing blocks and 2 weeks for window works only. Our guide to the HDB renovation permit walks through the application.

Grilles and safety

Families with toddlers, cat owners and anyone on a high floor often start here. Fixing an HDB balcony grille at the parapet is permit work under HDB's window works guideline. If your flat was handed over from mid-2007 onwards, the grille must be one of HDB's approved designs. These are shown in the renovation factsheet given at booking or key collection, or on MyHDBPage, so pull them up before you call a contractor.

Slim cable systems, often sold as invisible grilles, and traditional bar grilles are both grille designs, so the same permit and approved-design rules apply to either. Our comparison of invisible grilles vs traditional sets out the practical differences.

Blinds, films and sun protection

A west-facing balcony in Punggol or Jurong West can feel like an oven by late afternoon, so shade often comes next. For balcony blinds HDB keeps it simple: its window works guideline says blinds, bamboo chicks and curtain rails installed internally need no permit. Films over window or balcony door glass need no permit either, as long as they are non-reflective or do not exceed 20% reflectance. Ask the installer to show you the reflectance on the product sheet.

Cords are the hidden risk. The Consumer Product Safety Office safety tips on window coverings suggest choosing coverings without exposed cords if you have young children, or considering cordless ones. Make sure no loose cords can be reached on the front, side or back, keep cribs, beds, play pens and other furniture away from the window, and always supervise children where cords are within reach. Our windows and doors FAQ covers more fittings questions.

Pots, ledges and killer litter

Balcony gardens and laundry are part of daily life, but anything that drops from a high floor becomes killer litter. HDB's killer litter guidance lists these don'ts:

• Placing objects on window or balcony ledges.
• Hanging items above parapet walls or balconies.
• Tying or hanging objects from bamboo pole holders.
• Placing bamboo poles in a criss-cross manner.
• Fixing laundry brackets to the parapet wall.

In practice, keep pots on the floor, choose wide, heavy bases for tall plants and tie climbers to a stand that sits inside the parapet, not on it. After a storm, walk the balcony and bring in anything the wind has shifted.

Floors, drains and waterproofing

Cracked or hollow-sounding balcony tiles are a common fix in resale flats. HDB's building works guideline lists replacing floor finishes, whether ceramic, homogeneous, terrazzo, marble, parquet, timber or other tiles, as permit work. The total thickness of floor finishes and screed must not exceed 50mm, which matters if you want new tiles laid over old ones.

For bathrooms and toilets, the same HDB page requires pre-packed waterproofing screed and a waterproofing membrane before new floor finishes go down, with the membrane turned up at least 150mm against walls and kerbs. For a balcony, ask your contractor how they will handle waterproofing and the fall of the floor towards the drain, and check with HDB if you are unsure.

Condo balconies are different

If you own a condo rather than an HDB flat, a different set of rules applies. The Urban Redevelopment Authority (URA) guidelines on balconies say private flat and condominium balconies must not be enclosed with walls or glass panels, as they are meant to be semi-outdoor spaces. Blinds are treated like furnishing and need no URA planning permission. Balcony screens may be allowed if they can be drawn open or retracted fully and allow natural ventilation at all times, even when fully closed. Safety grilles are not balcony screens and do not need URA approval. In an existing condo, follow your Management Corporation Strata Title (MCST) design guidelines as well; our condo renovation rules guide explains the approval side.

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