Seller-side surveys
The property questionnaire lists alterations and the single survey says it saw an extension. Which document is the seller's list?
The property questionnaire is the seller's list. It is the seller's own account of alterations, sitting inside the Home Report alongside the single survey. The single survey is the surveyor's document. When it says it saw an extension, that is an observation from the visit, not the seller's schedule of what was done. In Scotland a purchaser is pointed to that Home Report, which is not an English Level 2 you instruct yourself. Do not swap the two papers. The list of alterations the seller made is the questionnaire.
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?
The questionnaire asks the seller about alterations, guarantees and other matters the surveyor may not be able to see. The single survey then reports condition, and it may note an extension because the building shows one. Those can overlap without being the same list. The seller might omit a change the surveyor sees, or record a change the surveyor could not identify. Neither mismatch rewrites the questionnaire into the survey, or the survey into the seller's words.
Read them side by side with your solicitor. Ask which alterations are only in the questionnaire, which are only in the single survey, and which papers support either. Do not invent a life for the Home Report, and do not treat the surveyor's sentence about an extension as the seller's disclosure completed. If you want a further private survey, ask that firm what these two documents have already covered. The questionnaire remains the seller's list either way.
What should you ask your surveyor?
- Which alterations are written in the property questionnaire rather than in the single survey?
- Is the note that an extension was seen your observation, not the seller's list?
- Where do the two documents differ, if they differ at all?
What are the typical next steps?
- Treat the property questionnaire as the seller's list of alterations.
- Treat the single survey's extension note as the surveyor's observation.
- Ask your solicitor to compare the two and call for any missing papers.
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 single survey saw an extension, is that now the seller's list?
No. Seeing an extension is the surveyor's observation in the single survey. The seller's list is the property questionnaire. One may confirm the other, but the survey does not become the seller's disclosure because it mentions the same extension. Keep the author of each sentence clear.
Does the Home Report replace the property questionnaire?
No. The property questionnaire is part of what a purchaser is pointed to in the Home Report, not a document the single survey erases. That Scottish bundle is not an English Level 2 you commission yourself. You still read the seller's list, and you still read the survey, as two papers inside that product.