How much does damp treatment cost in the UK?
A 2026 guide to the cost of treating rising damp, penetrating damp and condensation.
Damp treatment costs depend heavily on the cause and how much of the property is affected — which is why a proper survey comes first. Here are typical 2026 prices.
Typical damp treatment costs
| Job | Typical cost (2026 guide) |
|---|---|
| Single wall (localised) | £300–£400 |
| Chemical DPC injection | £50–£70 per linear metre |
| Replastering after treatment | £300–£500 per room |
| Condensation treatment | £200–£1,000 |
| Rising damp (Victorian terrace, ground floor) | £2,500–£5,000 |
| Typical full project | £2,500–£6,000 |
These are typical guide prices for 2026 and will vary by job, property and location. Always get written quotes for your own project before deciding.
What affects the cost?
- The type and cause of the damp
- The area affected and how much replastering is needed
- Any tanking, ventilation or drainage work
- The number of external walls (terraced homes cost less)
- Whether a guarantee or certificate is provided
- London labour rates
Damp treatment costs in London
London’s many older, solid-wall terraces and converted flats often need careful, tailored treatment, and labour rates run above the national average. A proper survey is the best way to get an accurate price.
How to get a fair price
Get a survey and a written report that identifies the cause — not just the treatment. Check for PCA membership and whether any guarantee is insurance-backed, and be cautious of anyone quoting for treatment without inspecting first.
Frequently asked questions
How much does it cost to treat rising damp?
Treating rising damp on the ground floor of a typical Victorian terrace usually costs £2,500–£5,000 including replastering, though smaller areas can be far less.
Is condensation cheaper to fix than rising damp?
Usually, yes. Condensation is often about ventilation and typically costs £200–£1,000 to address, whereas rising or penetrating damp involving replastering costs more.
Do I need a survey first?
For anything beyond a small area, yes. A survey identifies the real cause so you treat the problem rather than just the symptom — and avoid paying for the wrong work.
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