How much does damp proofing cost in the UK?
Damp proofing costs £1,200 on average in the UK. Most jobs fall between £500 and £6,500 to treat rising damp. Size of the job: One damp wall £500 to £1,200; Whole room £1,000 to £2,500; Several rooms or whole house £3,000 to £6,500. Prices reviewed July 2026.
Damp proofing usually costs between £500 and £6,500 in the UK, with most people paying around £1,200 to treat rising damp in one room, including a new damp proof course and replastering. An independent damp survey is a separate £150 to £350. The price depends mainly on how many walls are affected and how much replastering is needed.
Damp proofing cost calculator
Use the calculator to price your damp proofing in 2026. Adjust the options and area for a UK cost range. Nothing is sent anywhere.
Damp proofing cost breakdown
Typical damp proofing costs, by option:
| Size of the job | Typical UK cost |
|---|---|
| One damp wall | £500 to £1,200 |
| Whole room, DPC and replaster | £1,000 to £2,500 |
| Several rooms or whole house | £3,000 to £6,500 |
What's included in the price?
Typical damp proofing prices include:
- A survey to find the cause and how far the damp has spread
- Injecting a new chemical damp proof course into the wall
- Hacking off damp, salt-contaminated plaster
- Replastering with a salt-retardant render and skim finish
- Removing waste and refitting skirting boards where needed
- A written guarantee on the damp proof course work
What changes the price?
The things that move damp proofing prices most:
How many walls or rooms are affected
Whether it is rising or penetrating damp
The amount of replastering needed
Your region
Whether skirting boards and a long guarantee are included
Access and the age of the property
These are why two quotes for the same job can differ, and the only way to know your price is to get prices from local firms.
How the price is built up
You pay for the survey and diagnosis, the damp proof course injected along the affected walls, then hacking off and replastering with a salt-resistant render. More walls, more replastering and a longer guarantee all push the price up. Most of the price is labour: injecting the course, hacking off old plaster and replastering are skilled, messy jobs. Materials such as DPC cream, waterproof render and plaster are a smaller share, usually a quarter to a third of the total.
Ways to keep the cost down
- Get an independent survey rather than a free one from a firm that wants the job
- Fix the real cause first, such as high ground levels or leaking gutters, as it may not be rising damp at all
- Do your own decorating once the fresh plaster has fully dried
- Get quotes from two or three PCA-registered firms
Does where you live change the cost?
In London, damp proofing typically costs around £1,400, about 20% above the UK average of £1,200. In the North, Scotland and Wales the guide figure is nearer £1,200.
| Region | From | Typical | Up to |
|---|---|---|---|
| Midlands / East (UK average) | £500 | £1,200 | £6,500 |
| London | £600 | £1,400 | £7,800 |
| South East / South West | £530 | £1,300 | £6,800 |
| North / Scotland / Wales | £490 | £1,200 | £6,300 |
Guide prices to treat rising damp, scaled with the same regional multipliers as the calculator. Not quotes.
Damp proofing cost in major UK cities
| City | From | Typical | Up to |
|---|---|---|---|
| Belfast | £480 | £1,100 | £6,200 |
| Birmingham | £500 | £1,200 | £6,500 |
| Bristol | £530 | £1,300 | £6,800 |
| Cardiff | £490 | £1,200 | £6,300 |
| Edinburgh | £490 | £1,200 | £6,300 |
| Glasgow | £490 | £1,200 | £6,300 |
| Leeds | £490 | £1,200 | £6,300 |
| Liverpool | £490 | £1,200 | £6,300 |
| London | £600 | £1,400 | £7,800 |
| Manchester | £490 | £1,200 | £6,300 |
| Newcastle | £490 | £1,200 | £6,300 |
| Sheffield | £490 | £1,200 | £6,300 |
City guide estimates, scaled by local labour costs. Indicative averages for damp proofing, not quotes.
Firms in London and the South East charge the most; the North, Wales and Scotland are usually a little cheaper for the same work.
Compare this with a real quote
The figures above are guide prices. Two or three quotes for your damp proofing tell you what it costs where you live.
Common questions
How much does damp proofing cost in 2026?
Most people pay around £1,000 to £1,200 to treat rising damp in one room, including a new damp proof course and replastering. A single wall can be £500 to £1,200, while a whole house runs from £3,000 to £6,500.
How much does a damp survey cost?
An independent damp survey usually costs £150 to £350. Some damp proofing firms offer a free survey, but they are quoting to win the work, so it is worth paying for one unbiased opinion first.
What affects the price of damp proofing?
Mainly the number of affected walls and how much replastering is needed. Penetrating damp, poor access, an older property and a longer guarantee all add to the cost.
Can I damp proof a wall myself?
You can buy DPC injection cream and treat a wall yourself for £50 to £150 in materials, but the replastering is skilled work and getting the diagnosis wrong wastes money. Most people use a specialist for anything more than a small patch.
How long does damp proofing take?
The injection and replastering for one room take one to two days. The new plaster then needs four to six weeks to dry before you decorate, and longer on thick or old walls.
Is it always rising damp?
Often not. Condensation, a leaking gutter, high outside ground levels or a bridged cavity cause many damp problems and cost far less to fix. A good survey checks the real cause before anyone suggests a new damp proof course.
Official guidance and sources
The rules and schemes referenced on this page come from these official UK sources. The price figures are Costwise's own; see how we price.
- Building regulations: Approved Document C GOV.UK · Requirement C2 covers resistance to moisture, and puts the damp proof course in an external wall at least 150mm above the adjoining ground, which is why a built-up outside level lets damp into a wall built to keep it out.
- Understanding decay in an older home Historic England · Advice to find and resolve the cause of damp rather than the symptoms, listing raised ground level and lack of ventilation among the common causes.
Cite this data
These figures are free to use in articles, reports and research under a CC BY 4.0 licence. All we ask is a credit to Costwise, and online a link. Where your style allows, please make "Costwise" the linked word so readers can check the figure for their own region.
Costwise (2026): Damp proofing typically costs £1,200 in the UK, ranging from £500 to £6,500. Reviewed July 2026. costwiseuk.co.ukSource: Costwise (costwiseuk.co.uk)Costwise (2026). Damp proofing cost. Costwise UK cost data, version 2026-10-12. https://costwiseuk.co.uk/damp-proofing-cost/2026-10-12 (158 jobs)Dataset DOI: 10.5281/zenodo.21159943 · also on Kaggle, Hugging Face and Figshare. Method: how we price. Downloadable CSV.
These are independent guide prices based on typical UK jobs in 2026. Your actual cost depends on your property, spec, access and where you live. Always get at least three written quotes before committing.