How Much Does a Damp Survey Cost in the UK?

Understanding what you pay for, and why, removes the guesswork from sorting out damp and mould. Below we break down the damp survey cost, what the fee covers, how treatment is priced and when a survey is genuinely worth it.

What does a £500 damp survey include?

Our £500 fixed fee covers a comprehensive damp and mould survey, which is also our full damp investigation. There is no hourly rate and no surprise add-ons. The fee includes a thorough on-site inspection of the affected areas, identification of the likely cause, and a written report you can rely on.

The report is insurance-ready and comes with a photographic evidence appendix, so you have documented proof of the condition and findings. That matters if you need to make a claim, present evidence to a landlord, or simply keep a clear record before any work begins.

Why does a proper survey cost money?

A proper survey costs money because diagnosing damp correctly is skilled work, and getting it wrong is expensive. Damp has several causes, including penetrating damp, rising damp, condensation and leaks, and each demands a different fix. Treating the wrong cause wastes money and leaves the problem to return.

A free “survey” offered by a treatment firm is usually a sales visit aimed at selling you a product. A paid, diagnostic survey is focused on finding the real cause and giving you an honest, evidenced report. The £500 you spend protects you from far larger sums spent on the wrong remedy.

What are the signs you need a damp survey?

You need a damp survey when visible or recurring symptoms suggest moisture is getting into the building or being trapped inside it. Common warning signs include:

• Black, green or white mould on walls, ceilings or around windows
• A persistent musty or earthy smell that will not clear
• Peeling paint, blown plaster or bubbling wallpaper
• Tide marks or staining low down on walls
• Damp or cold patches that feel wet to the touch
• Condensation and streaming windows that keep returning
• Crumbling skirting boards or rotting timber

If you are seeing any of these, a structured mould inspection will pin down whether you are dealing with condensation or a more serious water ingress problem.

How much does it cost to fix damp and mould?

The cost to fix damp and mould is quote based, never a one-size-fits-all figure, because every property and every cause is different. We do not publish a fixed treatment price because doing so would be misleading. Instead, we give you a precise, fixed-price quote tailored to your specific situation.

Here is how the quoting process works:

1. Book the £500 survey, or send us a video of the whole affected room to start.
2. We assess the cause and extent of the damp or mould.
3. We provide a clear, fixed-price quote for the remedial work.
4. You approve the quote with no obligation to proceed.

For remedial works, payment is split: 50% upfront and 50% on completion. Where a situation needs emergency or out-of-hours attention, additional cost applies, and we will always make that clear before any work starts.

Do landlords need a damp survey?

Yes, landlords increasingly need a damp survey to meet their legal obligations and to protect tenants. Under Awaab’s Law, social landlords face strict timeframes for investigating and fixing damp and mould hazards, and the Renters’ Rights Act extends similar expectations across the rented sector. A documented, evidenced survey shows you have acted responsibly.

The insurance-ready report with its photographic appendix gives landlords a defensible record of the property’s condition, the cause identified and the action recommended. That paper trail is invaluable if a dispute or complaint arises later.

Is a damp survey worth the cost?

A damp survey is worth the cost when you want certainty rather than guesswork. Spending £500 to understand exactly what is wrong almost always saves money against repeated, misdirected repairs. You gain a clear diagnosis, written evidence and a defined route to a fixed-price solution.

For homeowners, that means protecting the value and health of your property. For landlords, it means evidence of compliance and tenant safety. In both cases, an accurate diagnosis is the foundation of a lasting fix rather than a temporary patch.

Arrange your damp survey

Damp & Mould Solutions UK carries out comprehensive damp surveys across London, including central, north, south, east and west London and the surrounding areas. To book your £500 survey or get a fixed-price treatment quote, call us on 020 3051 8478 or send photos and a video of the affected room via WhatsApp. We will review your situation and explain your next steps clearly.

If you've got damp, mould, or a leak — you already know it needs sorting.

The longer it sits, the worse it gets. Most investigations are booked within 48 hours.