Subsidence, settlement and heave
A structural engineer's letter says one crack is historic and the home survey calls the same crack ongoing. What has neither document done to settle that disagreement by itself?
Neither document has settled the disagreement by itself. A structural engineer’s letter says one crack is historic, and the home survey calls the same crack ongoing. Each is an opinion from the work that person did. The letter is not a monitoring record just because an engineer signed it, and the survey is not a monitoring record just because it used the word ongoing. Historic means, in that letter, that the writer thinks movement has stopped. Ongoing means the surveyor thinks it has not. Neither has produced the dated series that would decide the point. The disagreement stands because both stopped short of that series.
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?
A single visit can misread an old crack as live, or a live crack as old, when the only evidence is the look of the edges, the filler, and the finishes. An engineer’s letter can be a careful look at the same edges on another day. What neither document has done is measure the crack over time, open the structure, or tie the line to a ground test. Quoting one against the other does not create that missing work.
Put both documents in front of one structural engineer and ask what investigation or monitoring would actually settle this crack, and ask the solicitor not to treat either wording as the last word in the meantime. Do not average the two opinions into a soft conclusion. The survey said ongoing. The letter said historic. The movement history that would choose between them has not been written.
What should you ask your surveyor?
- What did you see that led you to call this crack ongoing?
- What monitoring or opening-up was outside both this report and the letter?
- What further step would you expect before the disagreement is treated as settled?
What are the typical next steps?
- Keep both opinions, and do not treat either as the settled cause.
- Ask one engineer what monitoring or investigation would decide it.
- Tell the solicitor the crack’s history has not been established.
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 engineer is more specialist, must the survey give way?
Not automatically. A specialist letter can be the better brief and still not have monitored the crack. The home survey can be right that the crack looks ongoing and still not have proved it. Neither document settles the disagreement by itself. The next step is the work neither of them did, not a rank pulled out of the job titles.
Can filler in the crack prove the engineer’s historic label?
Filler proves someone filled it. It does not date the movement, and it does not prove the crack has stopped. The survey called it ongoing. The letter called it historic. The filler is compatible with both until there is a dated record. Neither document created that record.