- Postcode districts
- BT47, BT48
- Nearby
- Limavady, Coleraine and Magherafelt
- Guide price
- £5,700–£11,500
- Typical time on site
- 6–12 working days
- Water
- Soft across most of County Londonderry
- Survey
- Free, at your home
What does a loft bathroom cost in Derry?
As a guide, budget £5,700 to £11,500 including VAT for a loft bathroom in Derry; your written quote will pin it down. Prices in Northern Ireland run at about 12% below the national guide, mainly because of labour rates. The figure depends on the size of the room, whether anything moves, and the products you pick.
Refit
- Existing loft shower room
Signature
- Fitted furniture to the eaves
New loft bathroom
- Ventilation and electrics to regulations
Guide prices for Derry including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Derry
As well as Derry itself (BT47 and BT48), we survey in Limavady, Coleraine and Magherafelt.
Derry is a big place with every kind of home, from terraces to flats to new builds, so we never price from a photo alone. If your Derry house has a combi boiler, a loft shower can usually run on mains pressure without a pump. If your Derry loft shower is weak or the waste drains slowly, the fix is often in the pump or the pipe fall rather than the shower itself.
Most of County Londonderry is supplied with soft water. If that holds for your street in Derry, limescale on shower glass and heads builds up slowly and a squeegee after use is usually enough. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- A drainage route from the loft to the soil stack with enough fall, or a pumped waste or macerator where the rules allow it
- A check of the floor joists where a bath or large shower tray will sit
- A shower pump on a gravity system, an electric shower, or advice on moving to mains pressure, depending on your system
- A survey of the headroom across the room, with the usable height marked at each fitting position
Decisions to make first
Roof window
A roof window over the bath or shower brings daylight and fresh air, but plan the blind for privacy and expect condensation on cold glass.
Getting the water pressure
A pumped shower suits a gravity system with a cold tank; an electric shower heats cold mains water at the point of use; a combi or unvented cylinder gives mains pressure throughout.
Rules that apply in Northern Ireland
In Northern Ireland, building control covers the new drainage, any structural work to the floor and the ventilation, which is set out in Technical Booklet K. Wiring should be designed, tested and certified to BS 7671.

