Sidcup, Greater London
Condensation and mould ventilation fixes in Sidcup
We find why the house is wet and fix the ventilation, rather than painting over mould. Covering Sidcup and BR7, DA14 and DA15.
- From £525 inc VAT per fan
- Free survey

For tenants, landlords and homeowners in Sidcup, the common question is why the mould keeps coming back.
Customers in Sidcup can get a guide price online in a couple of minutes. It uses London rates, which is what we would charge for the same job anywhere in Greater London. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
Condensation and mould fixes in Sidcup at a glance
- Town
- Sidcup, Greater London
- Postcode districts
- BR7, DA14 and DA15
- Nearby
- Chislehurst (2 miles), Bexley (2 miles) and Welling (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
Condensation and mould fixes for Sidcup homes
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. We tell you if that is what we find rather than selling a fan that will not help.
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 Sidcup
| 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.
When to get it looked at
- Peeling paint or wallpaper in bathrooms
- Damp patches that dry out in summer and return in winter
- Someone in the home with asthma or allergies made worse by damp
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 Sidcup
What area around Sidcup do you work in?
All of Greater London. Near Sidcup that includes Chislehurst, Bexley, Welling and Eltham.
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 Sidcup and nearby?
Yes. We cover Sidcup and nearby places including Chislehurst, Bexley, Welling and Eltham. Send your postcode and we will confirm.
What is the price of a condensation fix in Sidcup?
Guide prices for Sidcup 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.
If we fit the fix, the Sidcup survey is free.
Condensation and mould fixes near Sidcup
More services in Sidcup
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.