Bathroom Renovation in Choi Wan

If the renovation strips the shower area back to the substrate, waterproofing must be redone — a failed membrane is the most expensive bathroom defect there is, because the fix means demolishing finished tiling. Several countries regulate wet-area waterproofing explicitly. Never let a contractor tile directly over an old or damaged membrane.

Buying your own toilet, vanity, and taps gives price control; buying through the contractor makes them responsible for defects, wrong sizes, and delivery timing. A common middle path: contractor supplies everything built-in or warranty-critical (shower valves, waste, membrane), you supply visible items like mirrors and accessories. Whoever supplies an item owns replacing it if it arrives damaged.

Strip-out, then first-fix plumbing and electrics (pipes and cables in walls), then substrate preparation and waterproofing, then tiling, then second-fix (toilet, vanity, taps, shower screen, lights), then silicone and snagging. If a quote or schedule doesn't follow this order, question it — out-of-sequence work is how leaks and redone tiles happen.

A bathroom renovation touches plumbing, electrics, waterproofing, tiling, and carpentry. A bathroom specialist or small contractor who coordinates all of it is usually worth the margin unless you have renovation experience — sequencing errors between trades (tiler before the plumber finished rough-in, for example) are the classic self-managed failure.

In rough order: whether you move plumbing (relocating the toilet or shower is the single biggest multiplier), the quality tier of tiles and fittings, bathroom size, waterproofing scope, and access (upper floors and apartment buildings cost more). Labour typically makes up 40-60% of the total, so a bigger bathroom does not scale cost linearly — fixture count matters more than floor area.

Around 10-20% is normal, sometimes more where custom vanities or imported fittings must be ordered up front — in that case pay the supplier invoice share, not a round 50%. Hold 5-10% back until the room has been used for a week or two and the snag list (grout gaps, silicone, door alignment) is closed.

A standard full bathroom renovation typically runs HK$60,000-HK$130,000, with basic refreshes from about HK$30,000-HK$50,000 and high-spec projects HK$150,000-HK$350,000. Small bathroom footprints don't make it cheap — demolition, waterproofing, and licensed trades dominate the cost.

You are, as the flat owner — water seepage cases between flats are among Hong Kong's most common building disputes, handled via the Joint Office (FEHD/BD) and civil claims. Insist on a named waterproofing system, proper curing time, and a written warranty from your contractor; it's your main protection.