What damp proofing costs on Teesside in 2026
On Teesside in 2026, budget £150 to £350 for an independent damp survey, £70 to £120 per linear metre for a chemical damp proof course with replastering, £180 to £1,200 for condensation control depending on the system, £300 to £900 a room for mould treatment, and £80 to £250 per square metre for below-ground waterproofing.
The headline numbers
| Work | Unit | Guide price |
|---|---|---|
| Independent damp survey and report | per property | £150 to £350 |
| Full damp and timber survey | per property | £250 to £400 |
| Chemical damp proof course, injection only | per linear metre | £25 to £45 |
| Damp proof course with replastering | per linear metre | £70 to £120 |
| Replastering, salt-retardant system | per m² | £45 to £70 |
| Repointing | per m² | £45 to £90 |
| Lime repointing on older property | per m² | £55 to £100 |
| Render repair | per m² | £60 to £120 |
| Breathable facade water repellent | per m² | £25 to £45 |
| Humidity-sensing extractor fan | each fitted | £180 to £350 |
| Positive input ventilation unit | each installed | £600 to £1,200 |
| Black mould treatment and redecoration | per room | £300 to £900 |
| Cementitious tanking | per m² | £80 to £150 |
| Cavity drain membrane with sump | per m² | £150 to £250 |
| Wet or dry rot timber treatment | per job | £800 to £4,000 |
What those numbers look like on a real house
A mid-terrace in Gresham or central Stockton with rising damp to the front room: 8 linear metres of damp proof course with replastering, £700 to £1,200, plus a couple of weeks of drying before decoration. The same house with the whole ground floor treated, 24 to 30 metres, £1,800 to £3,400.
A 1950s Billingham semi with mould in two bedrooms: a loft PIV unit at £850, a replacement bathroom fan at £250, and mould treatment and redecoration in both rooms at £900. Total around £2,000, and the problem does not come back.
A Redcar seafront property with penetrating damp: repointing 20m² of exposed elevation at £1,200, two render bays cut out and replaced at £600, gutter repairs at £180, and a breathable water repellent at £600. Around £2,600, most of it building repair rather than damp proofing.
A Victorian cellar in Linthorpe converted to a utility room: cavity drain membrane to 35m² of wall and floor, sump with twin pumps and battery backup, plus finishes, £7,500 to £11,000.
What actually moves the price
- Access. Scaffolding for a high elevation adds £400 to £1,200. A rear wall reachable only through a neighbour's yard changes the day rate.
- Wall thickness and construction. A solid nine-inch wall takes twice the injection of a single leaf, and thicker walls take much longer to dry.
- How much plaster comes off. Replastering is often more than half the bill. Where the plaster is sound and uncontaminated, it can sometimes stay.
- Making good. Skirtings, architraves, electrical sockets moved and refitted, flooring lifted and relaid. These are the items that vanish from a cheap quote and reappear as extras.
- Salt contamination. Coastal masonry at Redcar, Saltburn and the Hartlepool Headland often needs more plaster removed than an inland equivalent.
- Furniture, storage and occupation. Working around a fully occupied room costs more than an empty one.
Where money gets wasted
Three items account for most of the wasted spend in this trade locally. Injecting a wall whose damp proof course is fine but bridged by a raised drive or path, when a day with a breaker would have solved it. Replastering before the wall is dry, which guarantees a second visit. And treating mould repeatedly without touching the ventilation, which is a subscription rather than a repair.
Comparing quotes fairly
Ask every contractor for the same three figures: linear metres of damp proof course, square metres of replastering, and what making good is included. Two quotes that differ by £900 usually differ because one includes taking up and relaying the floor covering and the other does not. And check what the guarantee is, because a 30 year insurance-backed policy from a Property Care Association member and a typed promise from a sole trader are not the same product, whatever the headline number says.
For the diagnosis side, see the guide to telling damp types apart, and for the paperwork, what a damp guarantee is really worth.