Bathroom Cost by Room Type: Small, Family, En Suite and Downstairs Loo

Small bathrooms, typically anything under around 4 square metres, tend to cost less in absolute terms but not proportionally less per square metre, because a fitter still needs to strip out, replumb and re-electric the room regardless of size. A small bathroom refit in our region typically falls between £4,000 and £6,500 for a straightforward like-for-like layout with a shower, WC and basin.

Where small rooms can cost more than expected is when space is tight enough to need bespoke joinery, corner units, or a shower tray cut to an awkward shape. Tiny rooms also often need mechanical extraction rather than passive ventilation, which adds a small amount to the electrical first fix.

A typical family bathroom, around 2 to 3 metres square, with a bath, separate shower over or beside it, WC, basin and full tiling, is the job most homeowners picture when they think 'new bathroom'. In 2026 the realistic range is £6,500 to £9,500 for a mid-range specification, rising to £10,000 to £18,000 for a higher-end finish with a freestanding bath, concealed shower valve and large-format tiling.

Family bathrooms are also the room type most likely to need genuine layout changes, moving a bath to make space for a walk-in shower, for example, which adds plumbing and sometimes electrical relocation cost on top of the base figures above.

En suites are usually smaller than family bathrooms but often specified to a higher standard, since they serve a single bedroom and tend to be a design statement rather than a purely functional room. A typical en suite refit costs £5,500 to £9,000, with the wide range driven mainly by shower enclosure choice and tile format rather than room size.

One cost driver specific to en suites is drainage. Many are converted from a corner of a bedroom with no existing waste run nearby, which means longer pipe runs, sometimes below floor level, and occasionally a macerator unit if gravity drainage isn't practical.

A downstairs loo or cloakroom is the smallest and usually cheapest bathroom job, typically £2,000 to £3,800 for a WC, basin, tiling to one or two walls and a new floor covering. Because there's no bath or shower, both the plumbing and the tiling workload are much lighter.

The main cost variable in a downstairs loo is often not the room itself but access, if the waste pipe has to travel some distance to connect to the main stack, or if the space was previously a cupboard with no existing services at all, first-fix plumbing and electrics can add several hundred pounds even in a room this size.

Put simply, downstairs loos sit at £2,000 to £3,800, small bathrooms at £4,000 to £6,500, en suites at £5,500 to £9,000, and family bathrooms at £6,500 to £18,000 depending on specification. The overlap between categories is deliberate, a high-end en suite can cost more than a budget family bathroom, because finish and fittings matter as much as floor area.

When comparing quotes across room types, look at the specification line by line rather than the headline figure, since two 'family bathroom' quotes at very different prices are often actually pricing two different rooms in terms of what's included.

Whatever the room, certain costs don't scale down much with size. Skip hire or waste removal, a plumber's and electrician's time to attend site, and the base cost of a WC and basin are broadly similar whether the room is 2m² or 8m². This is why very small bathrooms rarely cost proportionally less than you'd expect, and why it's worth asking any fitter for an itemised quote so you can see which costs are fixed and which scale with room size.