Ewell, Surrey
Condensation and mould ventilation fixes in Ewell
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Ewell and KT4, KT17 and KT19.
- From £490 inc VAT per fan
- Free survey

For tenants, landlords and homeowners in Ewell, the common question is why the mould keeps coming back.
Whether the property is in the middle of Ewell or one of the villages around it, the process is the same: a look at the building, a written price, then fitting and testing on the agreed day.
Condensation and mould fixes in Ewell at a glance
- Town
- Ewell, Surrey
- Postcode districts
- KT4, KT17 and KT19
- Nearby
- Cheam (2 miles), Epsom (2 miles) and Worcester Park (2 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
Condensation and mould fixes for Ewell 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.
Survey and findings
Humidity and surface readings, existing fans flow-tested, and a written list of causes and fixes.
Fan upgrades
Weak or loft-vented fans replaced and ducted outside, with humidity control.
Guide prices in Ewell
| Work | Guide price |
|---|---|
| Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan) | £380–£650 inc VAT |
| Condensation and mould ventilation survey with written findings (per home) | £140–£250 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £490–£825 inc VAT |
South East rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
When to get it looked at
- Musty smell in bedrooms or wardrobes
- Peeling paint or wallpaper in bathrooms
- Damp patches that dry out in summer and return in winter
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). 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 Ewell
Is the survey free in Ewell?
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.
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.
How do I get a price for a condensation fix in Ewell?
Use the guide price tool, the form on this page, live chat, WhatsApp or call 0800 088 6341. A postcode and a couple of photos help us give you a useful answer first time.
What area around Ewell do you work in?
All of Surrey. Near Ewell that includes Cheam, Epsom, Worcester Park and Sutton.
Ask for an Ewell visit and we will test your existing fans before recommending anything.
Condensation and mould fixes near Ewell
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.