- Postcode districts
- W3, W4, W6
- Nearby
- Acton, Shepherds Bush and Fulham
- 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 Chiswick?
As a guide, budget £300 to £750 including VAT for a bathroom extractor fan in Chiswick; your written quote will pin it down. 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
- Ducted to outside
Inline fan
- Grille in the ceiling
Continuous extract
- Low-energy fan running all the time
Guide prices for Chiswick including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Chiswick
In Chiswick we cover W3, W4 and W6; we also cover Acton, 1.4 miles away, and Shepherds Bush.
London homes in Chiswick often mean stairs, permits and neighbours below; we plan the logistics as carefully as the bathroom. We check the duct route at Chiswick surveys, because a short, straight run to outside matters more than the fan's headline figure. In Chiswick flats, a new vent through an outside wall may need freeholder consent, so we raise it at the survey.
Most of Greater London has very hard water. 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
- 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
- Core-drilling through the wall, or ducting through the loft to a roof or soffit vent
- A backdraught shutter and external grille, so cold air does not blow back in
Decisions to make first
Intermittent or continuous
An intermittent fan runs during and after use. A continuous fan runs quietly all the time at a low rate and boosts when humidity rises.
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.
