- Postcode districts
- KT23, RH4
- Nearby
- Leatherhead, Reigate and Redhill
- Guide price
- £280–£650
- Typical time on site
- half a day
- Water
- Hard across most of Surrey
- Survey
- Free, at your home
What does a bathroom extractor fan cost in Dorking?
For Dorking, our guide range for a bathroom extractor fan is £280 to £650 including VAT. Prices in South East England run at about 12% 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 Dorking including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Dorking
We work right across Dorking — KT23 and RH4 — and in neighbouring Leatherhead and Reigate.
Being a smaller town does not change how we work in Dorking: free survey, written quote, one team. If your Dorking bathroom has black mould on the ceiling or silicone, the fan and its duct are the first things we check. For windowless bathrooms in Dorking homes, continuous extract that boosts on humidity often works better than a fan tied to the light switch.
Water across much of Surrey is 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 fan chosen to meet the bathroom extract rate: 15 l/s intermittent or 8 l/s continuous
- A check of the room, any existing fan or vent, and the shortest route to the outside
- Wiring by a qualified electrician, with an isolator outside the room and RCD protection
- Run-on timer, humidistat or light-linked switching set up to suit how the room is used
Decisions to make first
Axial, centrifugal or inline
Axial fans suit short, straight runs; centrifugal fans cope better with longer ducts; inline fans sit in the loft and are the quietest in the room.
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.
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.
