Damp Proofing Cost Calculator
Choose your damp type, property and extent — get an instant indicative range built from real 2026 North London pricing. No email, no phone number, no catch.
How much will my damp problem cost to fix? This calculator gives an instant indicative range from the same 2026 North London pricing used across this site: DPC injection £70–£120/m, condensation remedies £300–£1,500, mould removal £200–£600 per room, penetrating damp repairs £150–£3,000, subfloor ventilation £150–£900. Select your situation below; the range updates instantly. It's an orientation figure, not a quotation — written quotes follow a £280–£450 survey that confirms the actual mechanism and scope.
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Your estimate
Select the closest match in each field. The estimate updates as you choose.
Related services and guides
Damp Surveys
The service this tool points toward — diagnosis-first, independent qualified providers.
View the serviceDamp Proofing (all services)
The service this tool points toward — diagnosis-first, independent qualified providers.
View the serviceDamp Proofing Cost Calculator FAQs
It's an honest orientation from real 2026 North London ranges — accurate enough to budget and to sanity-check quotes, not a substitute for a survey. Actual prices move with access, specification and what the investigation finds.
Because the estimate assumes your self-diagnosis is right, and misdiagnosis is the most expensive event in damp treatment. The £280–£450 survey confirms the mechanism before four-figure sums are committed.
No — the calculator runs entirely in your browser. Nothing is sent anywhere, and no contact details are requested.
Run each separately and add the ranges — mixed cases (a bridged DPC plus conversion condensation, say) are common in North London stock and each mechanism carries its own remedy.
Want a professional answer, not just an estimate?
Call today or book a survey — the right independent qualified specialist, matched to your property.