After the survey
Survey found subsidence or movement: what to do next
Subsidence wording needs careful separation. Historic settlement, minor cracking and active ground movement are very different buying risks. Before exchange, your job is to establish whether movement is active, what caused it, how it affects insurance and whether the lender is comfortable.
Last updated: 31 May 2026. Editorially reviewed: 31 May 2026.
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Run a free previewRed, amber and green triage
Red flags
- Surveyor suspects active movement and recommends structural engineer inspection.
- Diagonal cracks, distorted openings, sloping floors and doors out of square appear together.
- Past underpinning, insurance claim or monitoring exists but paperwork is missing.
- Insurers will not quote on normal terms before exchange.
Amber flags
- Historic bay-window settlement on older houses.
- Fine cracks near extensions, lintels or replastering with no other distortion.
- Trees on shrinkable clay where no active cracking is visible.
Green signals
- Surveyor describes movement as historic and stable.
- Structural engineer report confirms no current movement.
- Insurance history and monitoring records are available and acceptable.
Movement triage
| Finding | Likely meaning | Buyer response |
|---|---|---|
| Historic settlement | Past movement now stable. | Check paperwork and insurance, then price cosmetic repairs. |
| Bay cracking | Often shallow bay foundation movement. | Ask whether active; inspect lintels and drainage. |
| Active subsidence suspected | Potential ongoing foundation movement. | Structural engineer and insurer check before exchange. |
| Underpinned property | Past structural intervention. | Require records, guarantees and insurance confirmation. |
What to do next
- Ask the surveyor whether movement appears active, historic or inconclusive.
- Commission a structural engineer where active movement is suspected.
- Ask seller for insurance claims history, underpinning documents and monitoring records.
- Get buildings insurance quotes before exchange, not after completion.
- Ask your broker whether the lender must see the engineer report.
Evidence to gather
- Structural engineer report with likely cause, severity and recommended action.
- Crack monitoring records or past engineer letters if movement is historic.
- Insurance claim history, certificate of structural adequacy and underpinning details.
- BGS clay/shrink-swell and tree context as supporting data, not diagnosis.
Related next steps
Frequently asked questions
Is subsidence always a reason to pull out?
No. Historic stable movement can be manageable. Active or unexplained movement without insurance or engineer evidence is much more serious.
Who should inspect suspected subsidence?
A structural engineer should inspect where the surveyor suspects active movement or cannot establish cause and severity.
Can subsidence affect buildings insurance?
Yes. Past claims, underpinning and active movement can change premiums, excesses or insurer appetite. Check before exchange.
Can I renegotiate after a subsidence finding?
Yes, but use engineer evidence and insurance implications. A large reduction may be justified where resale, insurance or repair risk is material.
Check the address before you decide
Use MyPropertyScan as a buyer-risk preview alongside your survey. It will not replace professional advice, but it can surface flood, subsidence, EPC, listed-status, building-age and local-area prompts before you spend more money.
Run the check
Run a property check before you commission a survey
Flood, subsidence, EPC, crime, schools, broadband and price data before you spend on the survey.
Run a free previewEditorial review
Editorial owner: BiteRight Ltd, operator of MyPropertyScan. We review buyer guides against UK public property datasets, RICS survey wording, lender requirements, and common buyer questions.
Pages are updated when source coverage, property-risk guidance, survey cost assumptions, or product checks materially change. Methodology and dataset limitations are explained on the MyPropertyScan methodology page.
Sources used
We use UK public and specialist sources where they are available. Public datasets can be incomplete, delayed, or missing for some addresses. Treat them as a starting point, not as a replacement for professional advice.
Source standard: preference goes to official government datasets, statutory bodies, professional standards, and primary dataset publishers. We cite the source family on the page and explain coverage limits rather than filling gaps with unsupported estimates.