Bathroom Tech Guide
Bathroom with a wall-hung Japanese-style smart toilet
For UK homes

Smart toilets and bidet seats: find one that fits your bathroom

The hard part is not choosing features. It is knowing whether a seat will fit the toilet you already have, or whether you need a new toilet, a plumber and an electrician. We explain the fit checks and real costs before you spend anything.

Will a bidet seat fit my toilet? →Compare 8 models

Which of these sounds like you?

Your bathroom decides the type of product, and the type decides most of the cost. Start here rather than with a list of features.

Your situationWhat usually suitsTypical product priceWork involved
You are happy with your current toiletand just want a warm wash, heated seat or dryerElectric bidet seatAbout £250 to £2,500+Swap the seat, add a water connection and a safe power supply near the toilet
You are replacing the toiletor refitting the whole bathroomAll-in-one smart toiletAbout £800 to £5,000+Usually a new wall-hung pan and concealed frame, with water and power run inside the wall
There is no power near the toiletor you want to try the idea cheaply firstNon-electric bidet attachmentAbout £30 to £150Fits under your existing seat and runs off the cold feed. No warm water or drying

Price bands are broad September 2026 planning figures from UK retailer listings, not quotes. See the full cost breakdown, including fitting.

Three things that decide whether it will work

These are practical checks to make before ordering. Check them before you look at wash modes or night lights.

Power next to the toilet

Electric seats need a mains supply, and ordinary plug sockets are heavily restricted in UK bathrooms. Many homes need an electrician to fit a fixed connection point, and some of that work must be notified to building control.

A water connection you can reach

Seats usually tee off the toilet's cold feed. A bidet spray is treated as a high contamination risk under UK water rules, so the product or the plumbing must include the right backflow protection.

The shape and size of your pan

"Universal fit" is not a guarantee. The fixing-hole spacing, the length of the bowl and the room in front of the cistern all matter.

What each check involves and costs →
Electric bidet seat fitted to a standard close-coupled toilet, with its cable running in trunking to a wall-mounted fused connection unit and a wall remote beside it
A typical retrofit: the seat replaces your old one, and power comes from a fixed connection rather than a plug socket.

What you actually get from a smart toilet

The main reason people buy one is simple: you wash with warm water instead of wiping. Many owners find that cleaner and more comfortable, and some find it easier than wiping when reaching round is difficult. If you are buying for a medical or mobility need, ask an occupational therapist or GP which features matter for you. A heated seat takes the chill off a cold bathroom. Warm-air drying and deodorising are nice extras, not the main event.

What you are really paying for as you move up the price range is comfort and polish: warmer water that lasts longer, quieter operation, a better remote and, on the complete toilets, a cleaner look with nothing on show. See which features are worth paying for.

How we choose what to include

We have not tested these products hands-on. Our comparison is desk research: manufacturer specifications, UK retailer listings and verified customer ratings where we could find them, with the date we checked. We do not earn commission from any link on this site yet, and no brand has paid to be included. Read who runs the site and how.

Already know what type you need?

Compare eight UK-available seats and toilets side by side, with the fitting warnings for each.

Compare the models →

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