- Postcode districts
- TW3, TW5, TW7
- Nearby
- Hounslow, Heston and Southall
- Guide price
- £300–£750
- Typical time on site
- half a day
- Water
- Very hard across most of Greater London
- Survey
- Free, at your home
What does a bathroom extractor fan cost in Isleworth?
In Isleworth, a bathroom extractor fan typically costs £300–£750 including VAT, based on London prices. Prices in London run at about 25% above 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.
Extractor fan
- Fan with timer or humidistat
Inline fan
- Ducting to a roof or soffit vent
Continuous extract
- Good for windowless rooms
Guide prices for Isleworth including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Isleworth
We cover every part of Isleworth, including TW3, TW5 and TW7, and nearby Hounslow (0.9 miles) and Heston (1.5 miles).
London homes in Isleworth often mean stairs, permits and neighbours below; we plan the logistics as carefully as the bathroom. Fans fitted in Isleworth bathrooms are wired by a qualified electrician, with RCD protection and an isolator outside the room. In Isleworth flats, a new vent through an outside wall may need freeholder consent, so we raise it at the survey.
Supplies across most of Greater London are very hard. Steam carries that scale onto mirrors and glass, so a fan that clears the room quickly helps on both counts. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- 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
- Making good around the fan and checking that it extracts properly at the grille
- Core-drilling through the wall, or ducting through the loft to a roof or soffit vent
Decisions to make first
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.
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.
Rules that apply in England
In England, Approved Document F sets bathroom extract at 15 l/s for an intermittent fan or 8 l/s for continuous extract. Wiring a new fan alters a circuit in a room with a bath or shower, so it is notifiable under Part P.
