- Postcode districts
- NW6, NW10, W10
- Nearby
- Cricklewood, Shepherds Bush and Kilburn
- 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 Willesden?
For Willesden, our guide range for a bathroom extractor fan is £300 to £750 including VAT. 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 Willesden including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Willesden
As well as Willesden itself (NW6, NW10 and W10), we survey in Cricklewood, Shepherds Bush and Kilburn.
London homes in Willesden often mean stairs, permits and neighbours below; we plan the logistics as carefully as the bathroom. For windowless bathrooms in Willesden homes, continuous extract that boosts on humidity often works better than a fan tied to the light switch. In Willesden flats, a new vent through an outside wall may need freeholder consent, so we raise it at the survey.
Water across much of Greater London is 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
- Making good around the fan and checking that it extracts properly at the grille
- Rigid or semi-rigid ducting kept short and straight, and insulated where it crosses a cold loft
- A backdraught shutter and external grille, so cold air does not blow back in
- A fan chosen to meet the bathroom extract rate: 15 l/s intermittent or 8 l/s continuous
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.
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.
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.
