Northumberland Park, Greater London
Condensation and mould ventilation fixes in Northumberland Park
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Northumberland Park and N9, N17 and N18.
- From £525 inc VAT per fan
- Free survey

For Northumberland Park homes with streaming windows every morning, the fix is usually cheaper than people expect.
Whether the property is in the middle of Northumberland Park 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 Northumberland Park at a glance
- Town
- Northumberland Park, Greater London
- Postcode districts
- N9, N17 and N18
- Nearby
- Tottenham (under a mile), Tottenham Hale (1 mile) and Edmonton (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
Condensation and mould fixes for Northumberland Park 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.
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 Northumberland Park
| 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
- Someone in the home with asthma or allergies made worse by damp
- Black mould on window reveals, ceilings or behind furniture
- Water running down windows on cold mornings
Rules that apply in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. Damp and mould is assessed as a hazard under the Housing Health and Safety Rating System in England.
Questions from Northumberland Park
What is the price of a condensation fix in Northumberland Park?
Guide prices for Northumberland Park 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.
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.
Is the survey free in Northumberland Park?
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.
How do I get a price for a condensation fix in Northumberland Park?
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.
Send us photos of the mould and your fans and we will give a first view for your Northumberland Park home.
Condensation and mould fixes near Northumberland Park
More services in Northumberland Park
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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.