How much does damp proofing cost?
Injected damp-proof course is priced per metre of affected wall, plus salt-resistant re-plastering. Estimate yours below.
How damp proofing is priced
- 1Diagnose the cause
Rising, penetrating or condensation damp are different problems. A DPC only addresses rising damp.
- 2Injected DPC
A chemical damp-proof course is injected into the affected walls, priced per metre.
- 3Re-plaster
Salt-resistant re-plastering to ~1 m follows the injection — a significant part of the cost.
Damp is one of the most common reasons a property won't mortgage in its current state — which is exactly why it's a classic bridge-and-refurb opportunity. Cost it properly and treat the cause, not just the symptom.
Damp proofing costs (indicative)
| Job | Basis | Indicative cost |
|---|---|---|
| Injected DPC + re-plaster | per linear m | £50 – £95/m |
| One affected room | ~8–12 m | £450 – £1,100 |
| Whole ground floor | ~30 m | £1,500 – £3,000 |
| Cellar tanking | per m² | £55 – £140/m² |
DPC alone rarely cures penetrating damp — identify and fix the source first.
Frequently asked questions
How much does damp proofing cost per metre?+
Injected DPC with re-plastering typically costs £50–£95 per linear metre of affected wall. One room is roughly £450–£1,100.
Does a DPC fix all damp?+
No — a DPC addresses rising damp only. Penetrating damp and condensation have different causes and fixes; diagnose the source first.
Related tools & guides
Want to know how these figures are calculated? See our cost methodology.
Cost figures shown are indicative estimates, not quotations. You are responsible for verifying all costs (obtain contractor quotes) and any figures submitted to a lender. ScopeWise is a documentation tool, not financial, tax, structural or planning advice. HMO compliance prompts are guidance only — confirm requirements with your local council, as standards and licensing vary by authority.