St James's, Greater London
Condensation and mould ventilation fixes in St James's
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering St James's and SW1Y, W1J and W1S.
- From £525 inc VAT per fan
- Free survey
In St James's homes, black mould usually comes down to the same few causes: weak fans, loft-vented ducts and no background ventilation.
Whether the property is in the middle of St James's 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 St James's at a glance
- Town
- St James's, Greater London
- Postcode districts
- SW1Y, W1J and W1S
- Nearby
- West End (under a mile), Soho (under a mile) and Westminster (1 mile)
- Price region
- London
- Survey
- Free survey (UK mainland)
Condensation and mould fixes for St James's homes
Mould needs that damp surface to grow. Ventilation is usually the biggest part of the cure, but not the only part.
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 St James's
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £950–£1,675 inc VAT |
| 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 |
These ranges use our London rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
When to get it looked at
- 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. Damp and mould is assessed as a hazard under the Housing Health and Safety Rating System in England.
Questions from St James's
Is the survey free in St James's?
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.
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 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.
How do I get a price for a condensation fix in St James's?
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 St James's do you work in?
All of Greater London. Near St James's that includes West End, Soho, Westminster and West End of London.
Send us photos of the mould and your fans and we will give a first view for your St James's home.
Condensation and mould fixes near St James's
More services in St James's
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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.