Choosing a survey level
Why is a flood-risk map not a substitute for the survey’s comments on the ground floor?
GOV.UK’s long-term flood-risk check is a map for an area in England. It is not an inspection of this house’s floors, air bricks or drains. A home survey comments on what it sees at the building. It does not replace the map, and the map does not replace the survey. Scotland and Wales have their own services. Use the one for the country the house is in.
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 house can sit in a higher-risk area and still have no stain, or it can sit outside a mapped zone and still have a flooded cellar from a burst drain. The surveyor is not repeating the map unless they choose to mention it. Insurance and mortgage questions about flood are for the insurer and the lender, using their data, not a condition rating.
If you are worried, do both: read the official check, and read what the survey says about floors, air bricks and the ground levels outside. Do not ask the surveyor to ‘clear’ a map they did not produce. This page does not quote a risk percentage.
What should you ask your surveyor?
- Did you see any signs of flooding in the building, separate from any map?
- Are air bricks or ground levels part of that comment?
- Are you relying on a map, or only on the inspection?
What are the typical next steps?
- Run the flood check for the right country, and keep the result with the survey.
- Ask your insurer what they do with that result. Do not expect the survey to answer them.
- If the survey saw stains and the map is quiet, believe the stains enough to ask what caused them.
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 a survey guarantee the house will not flood?
No. It records condition on the day. A map is a long-term area tool. Neither is a promise.
Is the English flood check valid in Scotland?
No. Use the Scottish service. Do not paste an English map onto a Scottish house.