- Postcode districts
- BT47, BT48
- Nearby
- Limavady, Coleraine and Magherafelt
- Guide price
- £220–£550
- Typical time on site
- half a day
- Water
- Soft across most of County Londonderry
- Survey
- Free, at your home
What does a bathroom extractor fan cost in Derry?
Our guide price for a bathroom extractor fan in Derry is £220–£550 including VAT. Labour costs in Northern Ireland put local prices at about 12% below the UK guide figure. The figure depends on the size of the room, whether anything moves, and the products you pick.
Extractor fan
- Wired to regulations
Inline fan
- Quiet fan in the loft void
Continuous extract
- Boost on humidity
Guide prices for Derry including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Derry
In Derry we cover BT47 and BT48; we also cover Limavady, 14.7 miles away, and Coleraine.
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. Fans fitted in Derry bathrooms are wired by a qualified electrician, with RCD protection and an isolator outside the room. We check the duct route at Derry surveys, because a short, straight run to outside matters more than the fan's headline figure.
Supplies across most of County Londonderry are soft. Even so, condensation is the bigger problem in any bathroom, and a properly sized extractor is what deals with it. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- Making good around the fan and checking that it extracts properly at the grille
- Run-on timer, humidistat or light-linked switching set up to suit how the room is used
- Rigid or semi-rigid ducting kept short and straight, and insulated where it crosses a cold loft
- A fan chosen to meet the bathroom extract rate: 15 l/s intermittent or 8 l/s continuous
Decisions to make first
Wall or ceiling
A wall fan on an outside wall is the simplest. A ceiling fan over the shower takes steam away at source but needs ducting through the loft.
Timer or humidistat
A timer keeps the fan running after the light goes off. A humidistat starts it whenever moisture rises, which suits rooms where people forget.
Rules that apply in Northern Ireland
In Northern Ireland, ventilation is covered by Technical Booklet K, and building control is involved where a new bathroom is formed. There is no Part P, but the fan should be wired, tested and certified to BS 7671.
