Flood risk
Where a report pairs the riparian bank with an ordinary watercourse, what stays open about maintenance the home survey does not assign?
What stays open is who must maintain the bank, because the home survey does not assign that duty. The report pairs the riparian bank with an ordinary watercourse, which records the bank and the stream that were seen. It does not decide that you would be the riparian owner, what work the channel needs, or who should do it. The visit has not measured flood depth. GOV.UK's long-term flood-risk check is a separate product and does not assign maintenance either. The condition of the bank in view is a note. The responsibility stays outside the survey.
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?
An ordinary watercourse is a stream or ditch that is not a main river, and the bank beside it is the ground the surveyor could walk. People who own land next to such a channel can have responsibilities for the flow, but those responsibilities come from the title and from watercourse rules, not from a house inspection. The surveyor can describe erosion, a slumped toe or debris they actually saw. They cannot award the duty to you, to a neighbour or to an authority. The pairing names the feature.
Ask the solicitor to check the title against the bank and to find out who maintains this ordinary watercourse. The survey will not answer that. If you want the area's long-term flood risk, use the separate GOV.UK check, and do not expect it to name a contractor or a duty. A drainage or land specialist can comment on the bank that was seen, if the erosion matters. The report has not ordered clearance of the channel. Keep the visible bank and the unassigned maintenance as different questions.
What should you ask your surveyor?
- What condition of the bank did you actually record: erosion, debris, or only its presence?
- Could you see the bed of the watercourse, or only the near bank?
- Did the channel appear to leave this title, and where?
What are the typical next steps?
- Treat maintenance of the bank as unassigned by the home survey.
- Ask the solicitor to match the title to the ordinary watercourse.
- Use the long-term flood-risk check only as a separate area product.
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 seeing the bank make the buyer the riparian owner?
No. The survey paired the bank with an ordinary watercourse because that is what was there to see. Ownership comes from the title, which this inspection does not decide. You might own the bank, share it, or not own it at all. The solicitor has to read the plan. A walk along the water is not a transfer of responsibility.
Can the flood-risk check tell you who cuts the channel?
No. GOV.UK's long-term flood-risk check is about risk to an area. It does not assign maintenance of this bank, and the home survey does not either. The two products answer different questions. Who cuts the channel, if anyone must, is for the solicitor using the title and the watercourse information. The report has not named that person.