Bathroom Renovation in Kota Kinabalu

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.

Keep the existing layout, choose mid-range fittings from stocked lines rather than special orders, use large-format tiles only on feature areas, and paint rather than tile ceilings and upper walls. Do not economize on waterproofing, drainage falls, or the tiler's labour — those are the items whose failure costs multiples later.

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.

It can work on sound, well-bonded wall tiles and saves strip-out cost, but it fails on floors with movement, adds thickness that fouls doors and fittings, and hides the condition of the substrate and membrane. Most renovators strip back in wet areas — if a contractor proposes tile-over-tile in the shower zone specifically, treat it as a cost-cutting red flag.

2025-26 guides put basic upgrades at RM5,000-RM15,000 and mid-range remodels roughly RM15,000-RM40,000, with premium projects reaching RM55,000-RM90,000. Tiling runs RM10-30 per sq ft plus RM5-15 per sq ft for waterproofing.

Yes — the JMB or management corporation must approve the works, typically with a refundable renovation deposit, contractor registration at the guardhouse, and restricted working hours. Landed-home internal refits need no council permit unless walls or drainage change.