Harlesden, Greater London
Condensation and mould ventilation fixes in Harlesden
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Harlesden and NW2, NW10 and W10.
- From £525 inc VAT per fan
- Free survey
We survey Harlesden homes for condensation with meters, not guesswork, and explain what we find.
For condensation and mould ventilation fixes in Harlesden, send us the postcode, a few photos and a rough idea of the rooms involved. We will tell you what we would fit and roughly what it costs before arranging a visit.
Condensation and mould fixes in Harlesden at a glance
- Town
- Harlesden, Greater London
- Postcode districts
- NW2, NW10 and W10
- Nearby
- Willesden (1 mile), Kensal Green (1 mile) and Queen's Park (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
What the work involves
Ventilation is usually the biggest part of the cure, but not the only part. Heating patterns, insulation gaps and cold bridges matter too, and some damp is not condensation at all: leaks, penetrating damp and rising damp need different trades.
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 Harlesden
| 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 |
London rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
Common reasons people call
- Black mould on window reveals, ceilings or behind furniture
- Water running down windows on cold mornings
- Musty smell in bedrooms or wardrobes
Rules that apply in England
In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). Damp and mould is assessed as a hazard under the Housing Health and Safety Rating System in England.
Questions from Harlesden
What area around Harlesden do you work in?
All of Greater London. Near Harlesden that includes Willesden, Kensal Green, Queen's Park and Cricklewood.
Will a dehumidifier fix condensation?
A dehumidifier helps in one room but treats the symptom. Fixing the extract in the wet rooms, and adding whole-home ventilation where needed, removes moisture before it spreads.
Is black mould dangerous?
Damp and mould can affect health, particularly for people with asthma, allergies, weak immune systems, children and older people, according to NHS and government guidance. It should be dealt with rather than lived with.
Do you cover Harlesden and nearby?
Yes. We cover Harlesden and nearby places including Willesden, Kensal Green, Queen's Park and Cricklewood. Send your postcode and we will confirm.
What is the price of a condensation fix in Harlesden?
Guide prices for Harlesden 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.
We can log humidity in your Harlesden home afterwards so you can see the improvement.
Condensation and mould fixes near Harlesden
More services in Harlesden
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.