- Postcode districts
- SM1, SM5, SM6
- Nearby
- Sutton, Mitcham and Morden
- 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 Carshalton?
For Carshalton, 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
- Wired to regulations
Inline fan
- Quiet fan in the loft void
Continuous extract
- Boost on humidity
Guide prices for Carshalton including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Carshalton
We cover every part of Carshalton, including SM1, SM5 and SM6, and nearby Sutton (1.9 miles) and Mitcham (2.4 miles).
In Carshalton, many bathrooms are in flats or converted houses, so we check lease consents, access and the floor below before we price. We check the duct route at Carshalton surveys, because a short, straight run to outside matters more than the fan's headline figure. For windowless bathrooms in Carshalton homes, continuous extract that boosts on humidity often works better than a fan tied to the light switch.
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
- Run-on timer, humidistat or light-linked switching set up to suit how the room is used
- A backdraught shutter and external grille, so cold air does not blow back in
- Wiring by a qualified electrician, with an isolator outside the room and RCD protection
- Making good around the fan and checking that it extracts properly at the grille
Decisions to make first
Wall or ceiling
A wall fan on an outside wall is the simplest. A ceiling fan over the shower takes steam away at source but needs ducting through the loft.
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.
