Outbuildings and conservatories
A retaining wall leans into the garden and the house wall behind it is plumb. Why should the house not inherit the wall's rating?
The retaining wall that leans into the garden should keep its own rating, and the house should not inherit it. The house wall behind was plumb. A lean in a garden wall that holds ground back is a comment on that wall, its drainage and its foundations, not on the house. The survey can record the lean it saw. It does not transfer a condition mark from the garden structure onto the plumb wall of the house.
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?
Retaining walls fail in ways houses do not copy: retained soil, water behind the wall, and a face that was never part of the dwelling. A lean towards the garden is that wall's geometry. Because the house wall behind it is plumb, there is no visual case for hanging the house on the same comment. One leaning wall is not the whole property.
Deal with the retaining wall as its own structure when you speak to a contractor or the solicitor. Do not let an agent fold it into a house-movement story. A crack in the house, if one exists, needs its own description. This finding does not invent a rate of lean and does not say the house foundations have moved.
What should you ask your surveyor?
- Is the lean confined to the retaining wall, with the house wall plumb?
- Did you see cracking in the house at the same place, or only the garden wall?
- Will you keep the retaining wall's comment off the house rating?
What are the typical next steps?
- Rate and discuss the leaning retaining wall on its own.
- Do not give the house the garden wall's condition mark.
- If the wall holds up ground near the house, ask a separate question about that structure.
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 retaining wall falls, does the house rating change today?
Not from this finding. The house wall behind it was plumb. The lean belongs to the retaining wall, and the house has not inherited that mark.
Is a leaning garden wall the same as subsidence?
No. A leaning garden wall is not subsidence. Subsidence is a ground and foundation question for the house you are buying. This lean is the retaining wall.