Small maisonette bathroom mistakes to avoid in Singapore

The HDB Renovation Guide Singapore here covers the bathroom of a maisonette, the two-storey HDB flat, where the bath is often small and sits on the upper level. The core answer is that owners repeat the same errors in tight baths, and avoiding them saves money and daily frustration. Plan the layout, pick the right tile size, and respect waterproofing.

Why maisonette baths are tricky

In a maisonette, the main bath is usually on the upper floor and compact, serving bedrooms above the kitchen below. Plumbing runs through the slab, so moving points is costly and risky. A small room done wrong feels cramped for years, while a smart one works for a family across two levels.

Mistake 1: oversized tiles in a tiny room

Large 60 by 60 centimetre tiles in a 2.5 square metre bath leave awkward cuts and grout lines that date fast. Use 30 by 30 or 30 by 60 centimetre tiles, which suit the scale and waste less. Ceramic at S$3 to S$6 per square foot fits; homogeneous at S$6 to S$10 per square foot suits the wet zone.

Mistake 2: hacking the BTO waterproofing

If the maisonette is a BTO, the toilet tiles sit under a 3-year defect liability period. Hacking them early can void waterproofing and needs HDB approval. Wait out the period or keep the original layout to avoid leaks to the floor below.

Mistake 3: poor ventilation

An upper-level bath with a weak fan grows mould. Specify a humidity-rated extractor at S$80 to S$250 and keep the window clear. Stale air is the most common complaint owners mention after handover.

Mistake 4: a shower screen with no swing space

A hinged glass door needs clearance a small bath lacks. Choose a sliding or fixed panel at S$400 to S$700 instead. Measure the open arc before buying, or the door hits the basin.

Mistake 5: no storage plan

Toiletries pile on the basin when there is no niche. Build a recessed shelf in the wall (non-structural only) or a small plywood vanity at S$500 to S$1,200. Plywood with laminate beats particle board in steam.

Costs and HDB permit rules

Works touching pipes, the floor screed, or the window need an HDB renovation permit, and only HDB-registered contractors may do regulated works. Windows need HDB-approved contractors with shatter-resistant glass and rivet checks. Noisy works run 9am to 6pm, Monday to Saturday, none on Sundays or public holidays.

Tips to get it right

• Keep the original layout to avoid moving pipes through the slab.
• Pick smaller tiles that match the room scale.
• Wait out the BTO defect period before hacking tiles.
• Plan a niche or vanity so the basin stays clear.

FAQ

Can I move the toilet to the other wall? Moving soil pipes through the slab is costly and needs HDB approval, so avoid it.

Is a small bath reno expensive? A tidy maisonette bath runs S$4,500 to S$9,000 depending on fittings.

Do I need a permit to just add a fan? The fan is minor, but wiring must fit HDB's point cap and use a registered contractor.

A small maisonette bath rewards careful planning. Dodge the five mistakes, keep the layout, and the room serves a busy two-level home without feeling cramped.