Subsidence, settlement and heave
An underpinning letter in the drawer names the house two doors down. Why must you not attach that letter to this foundation?
The underpinning letter that names the house two doors down must not be attached to this foundation. It is a document about a different address. This house's ground, cracks and foundations are a separate question, answered only by what was seen here and by papers that actually name this property. A neighbour's letter does not travel along the terrace and become evidence that these foundations were underpinned or need to be.
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?
Underpinning is specific to the building that was worked on. Two doors down can share a street and even a soil, and still be a different job, a different history and a different foundation. Filing the letter in this house's drawer does not change the address printed on it. The survey of this house stands only on this house.
Show the letter to the solicitor as a neighbour's paper, clearly labelled with the other address. Do not put it in a pack as if it were this property's guarantee or this property's defect. If this house has cracks, they need their own reading. Nothing in the other letter measures them, and you should not invent a shared depth of underpinning.
What should you ask your surveyor?
- Which address does the underpinning letter actually name?
- Did you see any underpinning, or any mention of it, at this house?
- Will you keep that letter off this foundation in the way you write the report?
What are the typical next steps?
- Leave the underpinning letter with the address it names.
- Do not describe this house as underpinned because of a letter two doors down.
- If this house has movement, record that from this house alone.
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
If the houses are on the same terrace, does the letter cover them all?
No. The letter names only the house two doors down. Sharing a terrace does not attach that underpinning work to this foundation.
Can the seller's drawer make it this house's document?
No. The drawer it was kept in does not change the address on the letter. It remains the other house's document, not this foundation's.