Subsidence, settlement and heave
Does an old underpinning guarantee mean the movement has stopped?
No. A guarantee is evidence that someone designed and insured a repair, if the paperwork is real. It is not a measurement of the wall today. Movement can be stable, or it can have started again for a new reason, such as a drain.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
What is the fuller explanation?
Ask the seller for the engineer’s report, the drawings, the completion certificate and the guarantee, including whether it is insurance-backed and whether it transfers to a buyer. Read the exclusions. Many guarantees exclude later events such as a new tree or a leaking drain. The surveyor can look at the wall. They cannot vouch for a missing certificate.
Tell the lender and your proposed insurer what you have, in the surveyor’s words, once you have the papers. They decide what they need. Do not describe a guarantee as a clean bill of health. If the papers are missing, say that plainly. Rebuilding the paperwork may be impossible. Price the risk with your solicitor’s advice, not with a made-up reduction.
What should you ask your surveyor?
- Can you see signs of movement that look newer than the underpinning?
- What would you want the guarantee to cover that a visual inspection cannot check?
- Are the cracks you saw in the underpinned bay or somewhere else?
What are the typical next steps?
- Collect the documents before you negotiate. A sentence in the particulars is not a guarantee.
- Ask the insurer named on the guarantee whether it still applies and whether it will transfer.
- If the surveyor saw fresh movement, ask an engineer whether the old repair is still the right description.
Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.
Also asked about this
Is underpinning always a concrete beam under the wall?
It is one family of repairs. The drawings say what was done. Do not assume a method the certificate does not describe.
Should you walk away because a house was underpinned?
Not from that fact alone. Walk away, renegotiate or proceed based on the papers, the current cracks and your own advice. The word is not a rule.