If you’ve noticed signs of damp in your home, you may have seen adverts offering a free damp survey. At first glance, this sounds appealing. However, not all surveys are the same, and understanding what “free” really means can help you avoid unnecessary work and expense. This guide explains how free damp surveys work, what to watch out for, and when a paid, independent inspection is the better option.
What does a free damp survey usually involve?
In many cases, a free damp survey is not a detailed inspection but a sales-led assessment. The surveyor is often employed by a company that installs damp-proofing systems, and the visit may focus on identifying issues that justify their specific treatment.
This does not mean all free surveys are misleading, but it does mean they are usually limited in scope. You may not receive a written report, moisture readings may be brief, and alternative causes such as condensation or ventilation issues can be overlooked.
Why homeowners are drawn to free damp surveys
Damp is worrying. It affects health, damages property and can impact resale value. When faced with mould, peeling plaster or musty smells, many homeowners want quick reassurance without committing to fees. A free damp survey appears to offer clarity with no upfront cost.
The risk is that an incomplete diagnosis can lead to unnecessary treatments, such as installing a damp-proof course when the real issue is condensation or a simple external defect.
Common warning signs of a sales-led survey
- No external inspection of brickwork, pointing, gutters or render
- No discussion of ventilation, insulation or lifestyle factors
- No written report or moisture readings provided
- Immediate recommendation for chemical DPC installation
- Pressure to book work quickly or “lock in” a price
Independent trade bodies regularly advise homeowners to be cautious where a diagnosis is tied directly to selling a single solution. Checkatrade highlights the importance of understanding what is included in any damp survey before proceeding. Checkatrade – Damp proofing advice.
What a proper damp survey should include
A thorough damp survey focuses on diagnosis rather than selling a product. Whether paid or included as part of a quotation, it should normally include:
- External inspection of walls, pointing, render, gutters and roof details
- Internal moisture readings at different wall heights
- Assessment of ventilation, heating and insulation
- Identification of condensation, rising damp or penetrating damp
- Clear explanation of findings and recommended next steps
This approach helps ensure the correct problem is treated — not just the most profitable one.
When a paid damp survey makes sense
There are situations where paying for an independent survey is the sensible option. These include:
- Buying a property and needing evidence for negotiations
- Repeated damp issues that have returned after previous work
- Unclear symptoms where condensation and damp overlap
- Period properties with solid walls or mixed construction
In these cases, a written report gives you clarity and control, allowing you to seek competitive quotes or plan phased repairs.
Typical damp survey costs in the UK
According to independent cost guides, damp survey fees usually range from around £150 to £500, depending on property size and complexity. Larger homes or combined damp and timber surveys may cost more.
For guidance on typical pricing, see: Checkatrade – Damp survey cost guide.
How Go2 approaches damp surveys
At Go2 Property Services, surveys are designed to diagnose the cause of moisture accurately, not to push unnecessary treatments. Our approach considers the full building envelope, including ventilation, insulation, render, plaster and external defects.
This means homeowners receive practical advice based on the real cause of the issue, whether that involves damp proofing, repairs, insulation upgrades or simple preventative measures.
You can learn more about our approach here: Damp Proofing Services.
Free damp survey vs professional inspection: the key takeaway
A free damp survey can be useful as an initial opinion, but it should never replace a proper diagnosis where significant work is being recommended. If the advice feels rushed, one-sided or unclear, it is worth seeking a second opinion.
Correct diagnosis saves money in the long run by ensuring the right solution is applied the first time.
Next steps if you’re concerned about damp
If you’re unsure whether your issue is condensation, penetrating damp or rising damp, the safest option is to speak to a specialist who takes a survey-led approach. Go2 Property Services works across Surrey, London and Berkshire, offering honest assessments and long-term solutions.
To discuss your concerns or arrange a survey, visit our Contact page.
FAQs
Are free damp surveys reliable?
Some are useful as an initial check, but many are sales-led. Always ask what the survey includes and whether you’ll receive a written report.
Do I need a damp survey before buying a house?
If a mortgage survey flags damp or there are visible signs, a specialist damp survey can help you understand the risk and negotiate repairs.
Is condensation often mistaken for damp?
Yes. Condensation is one of the most commonly misdiagnosed issues and often requires ventilation and insulation improvements rather than damp-proofing.