Bathroom renovation in Dubai — what drives the cost, and what's the right sequence?

Short answer: the one thing you cannot cut corners on in a bathroom is WATERPROOFING — a proper wet-area renovation lays a continuous waterproof membrane over the floor and up the walls (with correct falls to the drain and reinforced corners), then FLOOD-TESTS it before a single tile goes on. "Test-before-tile" is the mark of a serious contractor and it's what stops a hidden leak wrecking your (and the neighbour's) ceiling later. Cost is driven mostly by the SPEC and the hidden work: the waterproofing, any moving of plumbing/drainage and electrics (first-fix), the tiles/sanitaryware/fittings you choose, and the labour — not the visible finishes alone. The sequence follows the trades in order; getting it right is what prevents rework.

Waterproofing (the non-negotiable): - Why: a bathroom is a wet area; water WILL find any gap, and a leak through the floor damages the structure and the unit below — expensive and disruptive. In Dubai, tanking of wet areas is the expected standard. - What should be done: a continuous waterproof membrane across the floor and up the walls (to a proper height in the shower), corners/joints reinforced, correct falls to the drain, and a flood test (typically 24-48h) BEFORE tiling. If a contractor tiles without waterproofing and testing first, walk away.

What drives the cost (roughly in order): - Hidden/first-fix work: waterproofing, moving/renewing plumbing and drainage, and electrics (lighting, shaver points, extractor). Moving the drain/soil position is a big cost. - Spec of tiles, sanitaryware and fittings — the biggest lever you control (a rain shower + freestanding bath + large-format stone is a different budget from a neat standard refit). - Labour + demolition + making good, and the size/complexity of the room. - Waterproofing/testing done properly costs a little more up front and saves a fortune later.

The sequence (order matters): 1. Strip out / demolition. 2. First-fix plumbing + electrics (pipe/drain positions, cables). 3. Waterproofing (tank) + FLOOD TEST. 4. Tiling (floor falls to drain). 5. Second-fix (sanitaryware, fittings, extractor). 6. Silicone/seal, snag.

Common mistake: choosing purely on the cheapest quote and getting a bathroom tiled over skipped or untested waterproofing — the leak shows up months later through the ceiling below. Insist on waterproofing + a flood test before tiling, and use a fit-out contractor who waterproofs and tests before tiling. Anyone had a leak from skipped waterproofing — what did the fix cost?