Harrow on the Hill, Greater London
Condensation and mould ventilation fixes in Harrow on the Hill
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Harrow on the Hill and HA1, HA2 and HA3.
- From £525 inc VAT per fan
- Free survey
For Harrow on the Hill homes with streaming windows every morning, the fix is usually cheaper than people expect.
Customers in Harrow on the Hill can get a guide price online in a couple of minutes. It uses London rates, which is what we would charge for the same job anywhere in Greater London. We survey first, free of charge for new installations on the mainland, then send a fixed written quote.
Condensation and mould fixes in Harrow on the Hill at a glance
- Town
- Harrow on the Hill, Greater London
- Postcode districts
- HA1, HA2 and HA3
- Nearby
- Harrow (under a mile), Sudbury (1 mile) and Headstone (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
Condensation and mould fixes for Harrow on the Hill homes
If extract fans are weak, ducted into the loft or switched off, and windows stay shut in winter, that moisture settles on the coldest surfaces: window reveals, external corners, behind wardrobes and on bathroom ceilings. Mould needs that damp surface to grow.
Fan upgrades
Weak or loft-vented fans replaced and ducted outside, with humidity control.
Whole-home ventilation
PIV, continuous extract or MVHR where moisture is spread through the house.
Guide prices in Harrow on the Hill
| Work | Guide price |
|---|---|
| Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan) | £415–£725 inc VAT |
| Condensation and mould ventilation survey with written findings (per home) | £150–£270 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £525–£900 inc VAT |
Guide prices using London rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Common reasons people call
- Damp patches that dry out in summer and return in winter
- Someone in the home with asthma or allergies made worse by damp
- Black mould on window reveals, ceilings or behind furniture
Rules that apply in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. Serious damp and mould is a hazard under the Housing Health and Safety Rating System, and social landlords now have fixed timescales under Awaab's Law.
Questions from Harrow on the Hill
Do you cover Harrow on the Hill and nearby?
Yes. We cover Harrow on the Hill and nearby places including Harrow, Sudbury, Headstone and Brent. Send your postcode and we will confirm.
How much does a condensation survey cost?
A ventilation survey with written findings costs £125 to £225 including VAT. If we are surveying for an installation we quote for, the survey is free.
Can you tell if it is rising damp?
We can tell you when the pattern does not look like condensation, such as a tide mark low on a wall or damp that appears after rain, and point you to the right specialist.
What is the price of a condensation fix in Harrow on the Hill?
Guide prices for Harrow on the Hill use London rates: new ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) is typically £525 to £900 inc VAT per fan. We confirm a fixed price in writing before any work starts.
Is the survey free in Harrow on the Hill?
For new installations on the UK mainland, yes. The survey is free and the quote that follows is fixed and in writing. Servicing, testing and repair visits are charged, and we confirm the cost before booking.
Book a condensation survey in Harrow on the Hill and get a written list of causes and fixes.
Condensation and mould fixes near Harrow on the Hill
More services in Harrow on the Hill
Get a guide price in two minutes
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.