Downstairs toilet cost: what it really costs in 2026
A Qome Snap Guide: quick, honest and no guff. Approximate figures, adjusted to your region inside Qome.
Snap answer
£2,500 – £5,500
Adding a downstairs WC starts around £2,500 basic, £3,750 mid-spec, and £5,500 premium, assuming an existing space like under the stairs.
Takes1–2 weeksDisruptionLow, contained to one corner of the house
Cost at a glance
| Option | Best for | Guide range |
|---|
| Basic | Standard suite in an existing space | £2,500 – £3,000 |
| Mid-spec | Better fittings and tiling | £3,750 |
| Premium | High-end suite and finishes | £5,500 |
Approximate guide figures, not quotes, Qome adjusts every price to your region.
What actually happens
- Space surveyed, drainage route is the deciding factor
- Stud walls or door moved if needed
- Soil pipe and water supply connected
- Ventilation installed (required with no window)
- Suite fitted; walls boarded and decorated
- Flooring, lighting and final fix
Price by region
Starting figures by region, the same honest baseline, adjusted for where you live.
London (Inner)from £3,900
London (Outer)from £3,400
South Eastfrom £3,000
East of Englandfrom £2,800
South Westfrom £2,600
Scotland (Highlands)from £2,400
West Midlandsfrom £2,400
North Westfrom £2,300
East Midlandsfrom £2,300
Scotland (Central)from £2,300
Yorkshirefrom £2,200
Walesfrom £2,200
North Eastfrom £2,100
Northern Irelandfrom £2,000
Popular choices
Under-stairs conversionsCompact cloakroom suitesBold wallpaper and dark paint, small rooms can be brave
Rules & regulations
- Building regulations apply, drainage, and ventilation if there's no opening window
- New electrics in there are notifiable under Part P
- No planning permission needed inside your own house
Snap tips
- Distance to the soil stack drives the price more than the suite does
- A macerator makes awkward locations possible, but gravity drainage is always better if you can get it
Price it properly on Qome
Choose your options and see an honest, region-adjusted estimate, free.