Northampton, Northamptonshire
Condensation and mould ventilation fixes in Northampton
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Northampton and NN1, NN2, NN3 and NN4.
- From £435 inc VAT per fan
- Free survey

We survey Northampton homes for condensation with meters, not guesswork, and explain what we find.
For condensation and mould ventilation fixes in Northampton, 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 Northampton at a glance
- Town
- Northampton, Northamptonshire
- Postcode districts
- NN1, NN2, NN3, NN4 and NN7
- Nearby
- Wellingborough (9 miles), Daventry (12 miles) and Rushden (12 miles)
- Price region
- East Midlands
- Survey
- Free survey (UK mainland)
What the work involves
Mould needs that damp surface to grow. Ventilation is usually the biggest part of the cure, but not the only part.
Mould treatment advice
How to clean and treat affected areas once the cause is fixed.
Survey and findings
Humidity and surface readings, existing fans flow-tested, and a written list of causes and fixes.
Guide prices in Northampton
| Work | Guide price |
|---|---|
| Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan) | £340–£575 inc VAT |
| Condensation and mould ventilation survey with written findings (per home) | £125–£220 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £435–£725 inc VAT |
Guide prices using East Midlands 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
- Water running down windows on cold mornings
- Musty smell in bedrooms or wardrobes
- Peeling paint or wallpaper in bathrooms
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 Northampton
Do you cover Northampton and nearby?
Yes. We cover Northampton and nearby places including Wellingborough, Daventry, Rushden and Kettering. Send your postcode and we will confirm.
What is the main cause of condensation in a house?
The main cause is moisture from everyday living, such as showers, cooking and drying clothes, that is not being extracted, combined with cold surfaces where it condenses. Poor or failed extract fans are a very common cause.
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.
What is the price of a condensation fix in Northampton?
Guide prices for Northampton use East Midlands rates: new ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) is typically £435 to £725 inc VAT per fan. We confirm a fixed price in writing before any work starts.
Is the survey free in Northampton?
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.
If we fit the fix, the Northampton survey is free.
Condensation and mould fixes near Northampton
More services in Northampton
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.