DAMP · UPDATED 2026-04-01
Damp Proofing & Treatment Cost London 2026
£300 – £3,000 per job
Damp treatment costs in London range from £300 for targeted mould treatment to £3,000+ for full rising damp remediation. LPG specialists diagnose the cause first · accurate diagnosis prevents unnecessary work.
Damp Treatment price breakdown — London 2026
| Job | Price range | Unit |
|---|---|---|
| Mould treatment & surface treatment | £300 – £600 | per room |
| DPC injection (rising damp) | £800 – £2,000 | per wall |
| Full wall replastering after DPC | £400 – £1,200 | per wall |
| Condensation control / ventilation install | £300 – £800 | per property |
| Full damp survey | £150 – £350 | per survey |
What affects the price
- Damp type. Rising damp requires physical DPC injection; condensation damp may only need ventilation and surface treatment.
- Extent of damage. Small localised patches cost less than whole-wall remediation requiring replastering.
- Replastering required. After damp proofing, affected plaster often needs to be replaced, adding £20–£40/m² for replastering.
- Awaab's Law compliance. Social housing landlords must act on damp and mould within strict statutory timeframes.
Frequently asked questions
How do I know if I have rising damp or condensation damp?
Rising damp typically appears as a tide-mark low on walls. Condensation damp appears higher up and often in corners. LPG carries out a full diagnostic survey before recommending treatment.
How long does damp treatment take?
Surface mould treatment takes 1–2 days. Full rising damp remediation with replastering can take 1–2 weeks depending on extent.
Related cost guides
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