Bathroom Renovations

A straightforward bathroom runs a few weeks, and the trades cannot simply be stacked to shorten it. The sequence is fixed. Strip out, then rough-in plumbing and electrical, then screed and waterproofing, then tiling, then fit-off. Waterproofing has to cure before anything goes over it, and that wait is not negotiable no matter how tight the schedule is. Most blowouts come from decisions made late or products arriving after the trade who needs them has moved on.

A certificate from the licensed person who did the work, stating the areas treated, the product used and the standard it was applied to. Keep it. It is what supports a claim if a leak appears later, and it is the sort of document a buyer's conveyancer asks about at sale. Photographs of the membrane before tiling are worth having alongside it, because once the tiles are down nobody can see what was under them. If nobody offers a certificate, ask before the tiler starts rather than afterwards.

Yes, and it is the single most effective way to control the cost. Keeping the toilet, basin and shower waste where they already are avoids cutting the slab or reworking the drainage under the floor, which is where both the money and the risk sit. It also usually shortens the job. Fixtures and finishes can still change the look entirely. The layout constrains the plan more than it constrains the result.

Replacing fittings and finishes in the same positions generally sits outside building permit territory, though that is not a blanket exemption. Structural work, altering windows, or changes to the drainage below floor level can bring one into play. Plumbing work is separate and has its own requirement. Licensed plumbers issue a compliance certificate for the work they do, and on a bathroom that certificate matters more day to day than the building permit question does.