Specialist support for your home
Professional mould and damp treatment
What a specialist usually does, what it typically costs, and what to watch out for.
What the work usually involves
Good treatment deals with the moisture, not just the visible mould.
Step 1
Finding the cause
A visit to look at where the mould is, check for leaks and blocked vents, and take moisture readings. For anything more than condensation, ask for the findings in writing.
Step 2
Treating the mould
Cleaning affected surfaces with a mould and mildew product, and removing porous materials that are badly affected, such as wallpaper, plaster, carpet or sealant.
Step 3
Fixing the moisture
The part that stops it coming back: better extraction in kitchens and bathrooms, repairing leaks, gutters, roofs or pointing, clearing air bricks, or insulating cold spots.
Step 4
Making good
Re-plastering and redecorating once the area is dry. Painting over mould without fixing the cause usually only hides it for a while.
Typical costs
These are rough national figures from published trade cost guides, not quotes. Prices vary a lot with the size of the problem, what is causing it and where you live (London and the South East are usually dearer).
| Job | Typical cost |
|---|---|
| Mould removal, one room | around £300 |
| Mould removal, whole home | around £1,200 |
| Damp survey, 2-bedroom flat | around £200 |
| Damp survey, 3-bedroom house | around £400 |
| Damp survey, 4-bedroom detached house | around £600 |
Source: Checkatrade 2026 cost guides for mould removal and damp surveys. Repairs to the cause, such as a new extractor fan, roof work or re-plastering, are extra. Last reviewed September 2026.
Watch out for
- Being sold an expensive damp-proof course or chemical treatment for what is really condensation. Ask how they ruled condensation out.
- A quote that only covers cleaning and painting, with nothing about the cause.
- Guarantees that don't say what they cover or who backs them.
- Pressure to sign on the day.
If you rent, damp and mould caused by the building is normally your landlord's responsibility. Report it to them in writing first.
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