Flood risk
The flood check talks about surface water, and the side gate is the low point into the garden. Why is the gate a levels question the survey can describe and the map cannot photograph for you?
Because the side gate is the low point, it is a levels question on the ground, and the flood map cannot photograph it for you. The long-term flood check for England can talk about surface water across an area. It does not stand in the side passage, see the fall of the path, or show how water would enter this garden at the gate. The survey can describe that gate, the relative levels, and where the path runs. The map cannot take that photograph. Use the check for the area category, and use the survey for the gate you can actually see.
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?
Surface water on a flood check is a mapped category for the locality. It is not a picture of this side gate, and it is not a prediction that water will arrive on a named day. The useful site question is simpler: is the gate lower than the path outside, does the passage fall towards the house, and is there a threshold that would stop water or let it through? Those are levels. A surveyor standing there can describe them. A printed check cannot.
Do not ask the map to do the survey's job, and do not ask the survey to replace the map. The report should say what the surveyor saw at the gate, not invent a flood depth. If the check shows a surface-water category for the area, keep that sentence next to the gate description rather than merging them into one claim. Your solicitor can ask about history. The photograph the map never took is still the surveyor's note of the low point.
What should you ask your surveyor?
- How does the side gate sit against the path and the floor inside?
- Did you see a fall towards the house, or only a low gate?
- Which comments are your site notes, as against the flood-check category?
What are the typical next steps?
- Read the flood check as the area category, including surface water.
- Use the survey for the levels at the side gate.
- Do not expect the map to photograph that gate.
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 surface-water category prove water enters at the gate?
No. The category is about the area. The gate is a levels point the survey can describe and the map cannot photograph.
Can the surveyor delete the flood-check result because the garden looked dry?
No. A dry day does not rewrite the map. It also does not replace a description of the low gate and the fall of the path.