- Postcode districts
- HA2, UB5, UB6
- Nearby
- Greenford, Harrow 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 Northolt?
As a guide, budget £300 to £750 including VAT for a bathroom extractor fan in Northolt; 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
- Wired to regulations
Inline fan
- Quiet fan in the loft void
Continuous extract
- Boost on humidity
Guide prices for Northolt including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Northolt
As well as Northolt itself (HA2, UB5 and UB6), we survey in Greenford, Harrow and Southall.
London homes in Northolt often mean stairs, permits and neighbours below; we plan the logistics as carefully as the bathroom. If your Northolt bathroom has black mould on the ceiling or silicone, the fan and its duct are the first things we check. Fans fitted in Northolt bathrooms are wired by a qualified electrician, with RCD protection and an isolator outside the room.
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
- A check of the room, any existing fan or vent, and the shortest route to the outside
- Core-drilling through the wall, or ducting through the loft to a roof or soffit vent
- A fan chosen to meet the bathroom extract rate: 15 l/s intermittent or 8 l/s continuous
- Run-on timer, humidistat or light-linked switching set up to suit how the room is used
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.
Noise
Compare the stated noise level in decibels. Inline fans and low-speed continuous fans are much quieter in the room than budget axial fans.
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.

