Bathroom regulations, FAQ
Do I need building control sign-off for a bathroom refit? Usually not for a like-for-like refit, but new electrical circuits or moving significant plumbing may need it, handled via the relevant registered tradesperson. Can I do my own tiling? Yes, tiling itself isn't regulated — it's the electrics and plumbing behind it that are.
Choosing bathroom tiles
Porcelain tiles are durable and low-maintenance, suited to floors and high-use areas. Ceramic is cheaper and easier to cut, often used on walls. Large-format tiles look sleek with fewer grout lines but need a flatter substrate to fit well — worth discussing with your fitter before ordering.
How long does a bathroom refit take?
A fixture swap (like-for-like toilet or basin) is usually a day or two. A full bathroom refit including tiling and waterproofing commonly takes 1-2 weeks, and it's often the only bathroom in the property out of use for that period — worth planning around if you only have one.
Bathroom condition and selling your home
A recently refitted, well-maintained bathroom is a genuine selling point, and any electrical certification from work done during the refit is worth keeping for buyers' solicitors. Visible damp or poor grouting, on the other hand, is one of the more common things a buyer's surveyor flags.
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.
Disabled Facilities Grants for bathroom adaptations
A Disabled Facilities Grant can help fund accessibility adaptations like a level-access shower or grab rails, subject to a means-tested assessment via your local council — worth researching eligibility before assuming an adapted bathroom is unaffordable, since the process and criteria vary by council.
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.