Non-standard construction
What should a survey say about a concrete plinth with a timber upper storey?
It should describe them separately. Concrete at the base of the wall and a timber upper storey are not one material, and a name that fits the plinth may not fit the timber. If ceilings hid the upper floor structure, the survey should say it was not seen rather than invent a single system for the whole 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?
These houses are easy to misfile. Someone sees concrete to about waist height, hears a non-standard label, and writes it across both floors. The upper storey may be timber studs, a frame, or something the lining conceals. A standard home survey does not remove secured panels, and the Level 1 scope does not include that opening-up. One exposed corner is not both storeys.
Ask for two short construction sentences, plus a third if the junction between them was visible. Cracks at that line are about the junction, not automatically about a named repair scheme. Level 3 is described for unusual buildings, and it still cannot report timber it did not see. Do not tell a lender a system name that the inspection did not establish.
What should you ask your surveyor?
- What did you see at the base, and what did you see on the upper storey?
- Was the upper structure hidden by linings?
- Are you using one system name for both? If so, what did you see that justifies it?
What are the typical next steps?
- Ask the report to split the plinth from the upper storey if they were merged.
- Do not choose a repair scheme from the concrete alone.
- If you need the hidden upper frame identified, that is a later opening-up, not a guess.
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
Does concrete at the base mean the first floor is concrete too?
Not unless it was seen. Ask. Do not copy the plinth upwards.
Is the timber upper storey a modern timber-frame kit by default?
No. Timber is a material the survey might see or might not. A product name needs evidence.