Londonderry County · County Londonderry
Extractor fan installation in Londonderry County
Bathroom, kitchen and utility fans sized to the required rates, ducted outside and tested. Covering Londonderry County and BT47 and BT48.
- From £160 inc VAT per fan
- By arrangement
A common fault in Londonderry County homes is a bathroom fan ducted into the loft instead of outside.
Work in Londonderry County follows the rules for Northern Ireland and finishes with a written record of what was fitted and how it was set up.
Extractor fans in Londonderry County at a glance
- Town
- Londonderry County, County Londonderry
- Postcode districts
- BT47 and BT48
- Nearby
- Derry (under a mile), Strabane (14 miles) and Limavady (15 miles)
- Price region
- Northern Ireland
- Survey
- By arrangement, travel quoted first
How we approach extractor fans in Londonderry County
Many existing fans were never doing their job: undersized, ducted into the loft space, fitted with a flex duct crushed in the joists, or switched off by occupants because they were noisy. The rate a fan delivers through a real duct run is often far lower than the number on the box, which is why we size to the room and test the result.
New fan through an outside wall
Core drilled, sleeved, wired from a fused spur and sealed outside.
Ducted to outside through the loft
Insulated duct to a roof, ridge or soffit outlet so warm moist air does not condense in the loft.
Guide prices in Londonderry County
| Work | Guide price |
|---|---|
| Like-for-like extractor fan replacement (existing duct and wiring) (per fan) | £160–£270 inc VAT |
| New extractor fan through an outside wall (core drilled, wired, tested) (per fan) | £315–£500 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £410–£675 inc VAT |
These ranges use our Northern Ireland rates. Prices include VAT at 20%. You get a fixed written price before any work is booked. Travel is quoted separately for this area.
When to get it looked at
- The fan runs but a sheet of toilet paper does not stick to the grille
- The fan is noisy, rattling or has stopped
- The duct ends in the loft rather than outside
Rules that apply in Northern Ireland
Northern Ireland has its own building regulations, with ventilation guidance in Technical Booklet K. We design to the Northern Ireland guidance and measure the airflow achieved.
Questions from Londonderry County
Do you cover Londonderry County and nearby?
Yes. We cover Londonderry County and nearby places including Derry, Strabane and Limavady. Send your postcode and we will confirm.
How much does it cost to fit an extractor fan?
Replacing a fan on an existing duct usually costs £175 to £295 including VAT. A new fan through an outside wall is typically £345 to £545, and a fan ducted to outside through the loft £445 to £745.
Can an extractor fan vent into the loft?
No. A fan should discharge to outside, because warm, moist air dumped in the loft condenses on the cold roof timbers and causes mould and rot there instead.
What is the price of new extractor fans in Londonderry County?
Guide prices for Londonderry County use Northern Ireland rates: like-for-like extractor fan replacement (existing duct and wiring) is typically £160 to £270 inc VAT per fan. We confirm a fixed price in writing before any work starts.
Is the survey free in Londonderry County?
Visits here are by arrangement. Because of the ferry or long travel involved, we quote travel separately and in writing before you commit, and we can often combine visits to keep the cost down.
Tell us how many rooms need fans in your Londonderry County home and we will quote them together.
Extractor fans near Londonderry County
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