- Postcode districts
- CF15, CF83
- Nearby
- Risca, Pontypridd and Gelligaer
- Guide price
- £230–£550
- Typical time on site
- half a day
- Water
- Varies across Gwent
- Survey
- Free, at your home
What does a bathroom extractor fan cost in Caerphilly?
Guide price in Caerphilly: £230–£550 including VAT, depending on the room and what you choose. Labour costs in Wales put local prices at about 7% 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 Caerphilly including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Caerphilly
In Caerphilly we cover CF15 and CF83; we also cover Risca, 5.5 miles away, and Pontypridd.
Homes in and around Caerphilly vary, so we look at the floor, the walls and the water system before we price anything. If your Caerphilly home is listed or in a period terrace, a fan ducted through the loft to a roof vent can avoid a new hole in the front wall, though consent may still apply. In Caerphilly flats, a new vent through an outside wall may need freeholder consent, so we raise it at the survey.
Hardness differs from one part of Gwent to the next. Scale is a minor issue next to condensation, which is what a properly sized extractor fan is for. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- A fan chosen to meet the bathroom extract rate: 15 l/s intermittent or 8 l/s continuous
- Rigid or semi-rigid ducting kept short and straight, and insulated where it crosses a cold loft
- Wiring by a qualified electrician, with an isolator outside the room and RCD protection
- Run-on timer, humidistat or light-linked switching set up to suit how the room is used
Decisions to make first
Replacement air
A fan needs air to replace what it removes, so leave a gap of around 10 mm under the door or fit a door grille. A sealed room starves the fan.
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 Wales
Wales has its own Part F with similar extract rates, and its own Part P, under which new fan wiring in a bathroom is notifiable.

