Damp Surveys in North London
The survey is the most valuable money you'll spend on a damp problem: it identifies the true cause before you pay for any treatment. We arrange damp and timber surveys across all of North London.
What does a damp survey involve? A professional damp survey inspects the property inside and out to identify the cause of moisture: the surveyor profiles moisture levels through walls at different heights, checks for hygroscopic ground salts, inspects external levels, pointing, render and rainwater goods, examines ventilation and heating patterns, and checks accessible timber for decay. It concludes with a written report identifying the damp type — rising, penetrating, condensation or construction defect — with recommended remedies and indicative costs. In North London a damp and timber survey typically costs £280–£450 and takes 1–2 hours for an average house.
Understanding the problem
Damp is the most misdiagnosed defect in UK housing, and the cost of misdiagnosis is brutal: condensation treated with a £3,000 chemical DPC it never needed; penetrating damp painted over four times; "rising damp" that was actually a leaking pipe. The industry's conflict of interest makes it worse — a free survey from a company that sells DPC injection tends to find a need for DPC injection.
A genuine survey follows BS 6576 and PCA methodology: evidence first, diagnosis second, treatment last. That's the standard we hold every provider to, and it's why we publish what a proper survey should include so you can judge any report you're given.
When you need a damp survey
- You've found damp, mould or a musty smell and don't know the cause
- You're buying a property and the Level 2/3 survey flagged damp
- A contractor has quoted for treatment without written diagnosis
- You're a landlord responding to a tenant's damp or mould report
- Previous treatment failed and the problem has returned
Getting the diagnosis right
A thorough survey covers: moisture profiling (readings at multiple heights and depths, not just surface meter waves); salts analysis where rising damp is suspected; external inspection of DPC line, ground levels, pointing, render, gutters and roofline; internal environment — ventilation, heating, humidity and condensation risk; and timber checks in subfloors, skirtings and roof voids for dry rot, wet rot and woodworm. The written report states the diagnosis, the evidence for it, the recommended remedy and an indicative cost — and it should be understandable by a non-specialist.
Survey types
Types of survey we arrange:
- Damp survey — diagnosis of a known damp problem in one or more rooms.
- Damp & timber survey — the standard combined inspection, covering moisture and structural timber together; the right choice for most period properties and pre-purchase checks.
- Pre-purchase damp inspection — a focused follow-up when a homebuyer's Level 2 or Level 3 survey flags "dampness noted", turning a vague caution into a costed scope before exchange. Pair it with our homebuyer damp checklist.
- Landlord compliance inspection — documented assessment of reported damp and mould with HHSRS-aware reporting for Awaab's Law timescales; see landlord mould compliance.
- Specialist referrals — where the survey identifies structural waterproofing needs, a BS 8102 waterproofing design survey follows.
What does it cost in North London?
| Item | Indicative range |
|---|---|
| Damp survey (focused) | £280 – £350 |
| Damp & timber survey | £320 – £450 |
| Pre-purchase damp inspection + report | £300 – £500 |
| Landlord compliance inspection | £300 – £500 |
Prices vary with property size and access. Survey fees are often offset against treatment if you proceed — confirm with the provider. Figures are indicative for North London (2026) and vary with property, access and scope — written quotations follow a survey. See the North London Damp Cost Guide or try the Damp Proofing Cost Calculator.
Our process
Tell us the problem
Call or use the contact form — describe what you're seeing and where. Photos help.
Survey & diagnosis
An independent qualified surveyor inspects the property and identifies the true cause, with a written report.
Clear written quote
You receive a costed scope for exactly what the property needs — no more, no less.
Treatment & verification
Works are carried out by vetted independent specialists, with guarantees where applicable and verification that the fix worked.
Frequently asked questions
In North London, £280–£350 for a focused damp survey and £320–£450 for a combined damp and timber survey. Pre-purchase and landlord compliance inspections with detailed written reports run £300–£500. Beware free surveys from firms selling treatment — the fee buys independence.
Typically 1–2 hours on site for an average terraced or semi-detached house, longer for larger properties or where subfloor and loft access is involved. The written report usually follows within 2–5 working days.
If the RICS Level 2 or 3 survey noted dampness — very common in the area's Victorian and Edwardian stock — a specialist damp inspection converts that caution into a diagnosis and costed scope you can negotiate with. On period property, many buyers commission one as a matter of course.
A valuation checks the property is adequate security for the loan; it may note damp but won't diagnose it. A damp survey exists specifically to find the cause and specify the fix. They answer different questions.
Normally whoever commissions it: buyers pay for pre-purchase inspections, owners for surveys on their own homes, landlords for compliance inspections. Occasionally sellers commission one to pre-empt negotiation; the report then belongs to them.
Worried about damp, mould or a wet basement?
Speak to us today or book a survey — we'll arrange the right independent specialist for your property.