- Postcode districts
- SE4, SE6, SE13
- Nearby
- Blackheath, Greenwich and Beckenham
- 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 Catford?
For Catford, our guide range for a bathroom extractor fan is £300 to £750 including VAT. We adjust the national guide for London, where prices are typically about 25% above the UK average. 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 Catford including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Catford
As well as Catford itself (SE4, SE6 and SE13), we survey in Blackheath, Greenwich and Beckenham.
In Catford, many bathrooms are in flats or converted houses, so we check lease consents, access and the floor below before we price. In Catford flats, a new vent through an outside wall may need freeholder consent, so we raise it at the survey. Fans fitted in Catford bathrooms are wired by a qualified electrician, with RCD protection and an isolator outside the room.
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
- Wiring by a qualified electrician, with an isolator outside the room and RCD protection
- A backdraught shutter and external grille, so cold air does not blow back in
- Rigid or semi-rigid ducting kept short and straight, and insulated where it crosses a cold loft
- Run-on timer, humidistat or light-linked switching set up to suit how the room is used
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.
