Subsidence, settlement and heave
How does a survey use the word settlement differently from subsidence?
Settlement is the movement that happens as a new or altered building’s weight beds into the ground, often early in its life. Subsidence is the ground moving downwards later and taking the building with it. Surveyors sometimes say “movement” when they cannot yet tell which. The word they chose matters.
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?
Old hairline cracks at a junction can be long-finished settlement. A crack that is opening, wider at the top, or matched by distorted doors may be ongoing movement, and subsidence is one cause. Trees, clay, leaking drains and mining are among the causes the Association of British Insurers discusses for subsidence. A visual survey does not prove which one.
Ask the surveyor whether they think the movement is historic or progressive, and what they could not prove. Do not upgrade “settlement” to “subsidence” in a message to the lender. If the report recommends monitoring or an engineer, that is the next instruction. Monitoring takes the time the engineer sets. There is no official number of weeks in the home-survey standard.
What should you ask your surveyor?
- Which word did you mean, and which word did you avoid?
- What signs made you think the movement might still be active?
- What investigation would tell settlement from subsidence here?
What are the typical next steps?
- Quote the surveyor’s word to the solicitor and the lender. Do not translate it into a scarier one.
- If an engineer is recommended, ask them the same distinction.
- Read the drain and tree comments before you decide the cause is the soil 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
Is every crack in a Victorian house settlement?
No. Age is not a diagnosis. Some cracks are old and finished. Some are new. The report should say what the surveyor believes and what is uncertain.
Does subsidence always mean underpinning?
No. The ABI explains that the repair depends on the cause. A leaking drain is a different repair from a foundation that needs support. The survey rarely designs either.