Bathroom fitting in older properties
Older properties sometimes have uneven floors, narrower doorways, or pipework not originally designed for modern water pressure — a fitter working on a period property will usually assess these before quoting for anything beyond a straightforward like-for-like swap.
What affects the cost
Cost depends on whether pipework and electrics need moving (not just swapping fixtures in place), the tiling area, fixture quality, and whether structural changes are needed (like removing a bath for a walk-in shower). Moving a toilet's position, in particular, is one of the more expensive changes because of the soil pipe work involved.
KBSA and TrustMark, what they actually mean
The KBSA (Kitchen Bathroom Bedroom Specialists Association) is the main UK trade body for the sector, though membership is limited to a few hundred companies nationally, so it's not something every bathroom fitter will have. TrustMark is a broader government-endorsed scheme covering many trades — worth asking which, if either, your fitter holds, rather than assuming either is universal.
What a good bathroom quote should include
A proper quote should specify the suite brand/model (not just "a toilet, a basin"), whether tiling and waterproofing are included, whether electrical and plumbing work is covered directly or subcontracted, and what happens if hidden pipework issues are found once the old suite is removed.
Bathroom work in flats and conversions
In a converted property, check whether waste pipework runs independently or shares a stack with other flats — this affects what changes are straightforward versus needing wider building consent. Worth checking before committing to a layout change like moving the toilet position.
Planning bathroom storage during a refit
Built-in storage (vanity units, recessed cabinets) is far easier to plan during a full refit than to retrofit afterwards, since it often needs coordinating with tiling and plumbing runs. Worth deciding on storage needs before the layout is finalised, not after tiling is complete.
Planning an en-suite bathroom
Adding an en-suite usually means extending plumbing and sometimes electrical circuits into a new area, and ventilation (an extractor fan, by regulation) becomes more important in a smaller enclosed space. Worth planning the layout around existing pipe runs where possible to control cost.
Why waterproofing (tanking) matters
Tanking is a waterproof membrane applied behind tiles, particularly around showers and baths, to stop water getting into the wall or floor structure below. Skipping this step is a common cause of hidden damp and rot that only becomes visible years later — worth confirming it's included, not assumed, in a refit quote.