Bathroom plumbing work and WaterSafe
Moving or adding plumbing (a new shower, relocated toilet) should follow Water Fittings Regulations, the same rules a WaterSafe-registered plumber works to. If your bathroom fitter isn't a registered plumber themselves, ask who does the plumbing side and whether they're WaterSafe registered.
Choosing taps and shower valves
A thermostatic shower valve maintains a constant temperature even if water pressure elsewhere in the house changes (someone flushing a toilet, for example) — worth the extra cost over a manual mixer valve for most households. Tap finish (chrome, brushed nickel, matte black) is largely aesthetic but affects how easily fingerprints and limescale show.
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.
Grout and sealant maintenance
Grout and silicone sealant are usually the first things to fail in a bathroom, well before the tiles or suite themselves — re-sealing around a bath or shower every couple of years, and re-grouting where needed, extends the life of the whole installation for relatively little cost.
Bathroom flooring options
Vinyl flooring is cheap, waterproof and easy to fit, suited to budget refits. Porcelain tile is more durable and higher-end but needs a sound, flat subfloor. Underfloor heating compatibility and slip resistance (particularly around a shower) are worth discussing alongside the look you want.
Standard radiator vs towel rail in a bathroom
A heated towel rail is generally less powerful as a room heater than an equivalent-sized standard radiator, so in a larger bathroom it's sometimes worth having both, or a larger towel rail sized properly for the room, rather than assuming any towel rail will adequately heat the space.
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.
How many quotes should you get?
Three is reasonable for most bathroom jobs. For a full refit, make sure each quote specifies the same suite brand and tile allowance, since bathroom quotes vary a lot based on fixture quality assumptions that aren't always stated upfront.