My Survey Mentions Damp — Should I Be Concerned?

Find out what damp readings in your survey mean, how to confirm the cause, and average costs to fix in London homes.

My Survey Mentions Damp — Should I Be Concerned?

My Survey Mentions Damp — Should I Be Concerned?
My Survey Mentions Damp — Should I Be Concerned?
My Survey Mentions Damp — Should I Be Concerned?
My Survey Mentions Damp — Should I Be Concerned?

Why it appears so often

RICS surveyors can only complete a visual inspection. They cannot open walls or lift floors, so when moisture is suspected, they must advise a specialist damp and timber investigation. This follows the RICS Home Survey Standard (2019, § 3.4 and 4.9) and joint guidance on moisture in traditional buildings with the PCA

Common Types

Type

Typical Cause

Specialist Needed

Rising damp

Bridged DPC, high ground levels

Damp & Timber

Penetrating damp

Defective gutters or pointing

Roofer / builder

Condensation

Poor ventilation

Retrofit or airflow upgrade

Typical Repair Costs (London):

  • Minor patch: £500–£1,000

  • DPC injection: £1,500–£3,000

  • Full replaster and damp proofing: £3,000–£5,000

Next Steps

  1. Commission a damp specialist report (£150–£300 + VAT).

  2. Compare remedial quotes.

  3. Log works and certificates in your digital logbook.

Unresolved damp can worsen plaster decay, timber rot, and mould growth, reducing indoor air quality and potentially affecting resale value.

Book a Free Consultation with us

Related reading

Why it appears so often

RICS surveyors can only complete a visual inspection. They cannot open walls or lift floors, so when moisture is suspected, they must advise a specialist damp and timber investigation. This follows the RICS Home Survey Standard (2019, § 3.4 and 4.9) and joint guidance on moisture in traditional buildings with the PCA

Common Types

Type

Typical Cause

Specialist Needed

Rising damp

Bridged DPC, high ground levels

Damp & Timber

Penetrating damp

Defective gutters or pointing

Roofer / builder

Condensation

Poor ventilation

Retrofit or airflow upgrade

Typical Repair Costs (London):

  • Minor patch: £500–£1,000

  • DPC injection: £1,500–£3,000

  • Full replaster and damp proofing: £3,000–£5,000

Next Steps

  1. Commission a damp specialist report (£150–£300 + VAT).

  2. Compare remedial quotes.

  3. Log works and certificates in your digital logbook.

Unresolved damp can worsen plaster decay, timber rot, and mould growth, reducing indoor air quality and potentially affecting resale value.

Book a Free Consultation with us

Related reading

Disclaimer

This article provides general guidance only and should not replace professional surveying advice. Always consult qualified specialists (CSRT-qualified damp surveyors, PCA members, or RICS surveyors) for property-specific recommendations.

The cost estimates provided are typical ranges (excluding VAT) as of October 2025 but vary significantly by region, property type, and scope of works. Always obtain written quotes for your specific circumstances.

We are not liable for decisions made based on this information. Property purchase is a significant financial commitment - seek independent professional advice appropriate to your situation.

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Ready to buy with confidence?

Upload your survey today. We’ll review and reply within 24 hours.

Ready to buy with confidence?

Upload your survey today. We’ll review and reply within 24 hours.

Ready to buy with confidence?

Upload your survey today. We’ll review and reply within 24 hours.

Survey Remedy is a London-based property data company bridging the gap between surveys and real-world repairs.

Canary Wharf, London

Click to Whatsapp

+44 020 8050 2537

All Right Reserved © Refined Survey Remedy - 2025

Survey Remedy is a London-based property data company bridging the gap between surveys and real-world repairs.

Canary Wharf, London

Click to Whatsapp

+44 020 8050 2537

All Right Reserved © Refined Survey Remedy - 2025

Survey Remedy is a London-based property data company bridging the gap between surveys and real-world repairs.

Canary Wharf, London

Click to Whatsapp

+44 020 8050 2537

All Right Reserved © Refined Survey Remedy - 2025

Survey Remedy is a London-based property data company bridging the gap between surveys and real-world repairs.

Canary Wharf, London

Click to Whatsapp

+44 020 8050 2537

All Right Reserved © Refined Survey Remedy - 2025