Subsidence, settlement and heave
Sycamore roots have lifted the path and the house wall beside it is plumb. Why is the path not the foundation?
The path is not the foundation because it is the surface the sycamore roots have lifted, while the house wall beside it is plumb. A distorted path can sit on paving and fill without the wall having moved. The survey has recorded lifted paving and a plumb wall. It has not exposed the foundations, and it has not decided that the house has subsided with the path. The path is a ground-level finish. It is not the footing under the wall.
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?
Roots thicken under slabs and flags and jack them up. That movement is real for the path. The foundation is the structure in the ground that carries the wall, and a plumb wall beside a lifted path is evidence the two have not moved as one. The surveyor could see the roots, the uneven path, and the upright wall. They did not dig beside the footing to see whether roots are under it as well.
Read the path as path damage from sycamore roots, and keep the plumb wall as a separate observation. If you need the footing checked, that is an opening-up the survey has not done. Tell the solicitor the house wall was plumb beside a lifted path. Do not describe the house as undermined because the flags are uneven. Any tree work is a further decision, not a finding that the foundation has failed.
What should you ask your surveyor?
- Which path have the sycamore roots lifted?
- What did you record about the house wall beside that path?
- Were the foundations exposed, or only the path and the wall seen?
What are the typical next steps?
- Read the lifted path as path damage, and keep the plumb wall separate.
- Tell the solicitor the house wall was plumb beside the lifted path.
- Do not describe the house as undermined because the flags are uneven.
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 path is badly lifted, must the foundation have moved as well?
No. A badly lifted path shows the path has moved under the roots. It does not show the foundation has moved, and the wall beside it is plumb. The survey did not expose the footing. Severity on the paving is not a substitute for movement in the house.
Were the foundations exposed, or only the wall judged plumb?
The survey recorded the house wall as plumb. It did not say the foundations were exposed or measured in a trench. Plumb describes the wall that was seen. It does not convert the lifted path into the foundation, and it does not claim the footing was inspected.