Spelthorne Borough Council

Providing Quality Services to the People of
Ashford, Laleham, Shepperton, Staines, Stanwell & Sunbury

Frequently Asked Questions

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Frequently Asked Questions | Blocked drains and sewers | Watercourses | Types of watercourses | Riparian responsibilities/rights | Types of flooding | Flood awareness | Flood preparation | Flooding: dos and don'ts | Where to find out more


  1. Who is responsible for the ditch at the bottom of my garden?
  2. What if the ditch is between my property and a public area, e.g a park?
  3. I have never heard of riparian rights or ownership, when did this come into force?
  4. If I have riparian ownership of the ditch at the bottom of my garden, am I allowed to extend my property and build on it?
  5. If someone is dumping rubbish in the ditch, what should I do?
  6. How important is the ditch - I have never seen water in it?
  7. What should I do if the road outside my house floods?
  8. How can I find out if I am in a flood area?
  9. How can I check if there is a flood alert?
  10. Who should I contact if there is a flood?
  11. If a flood does arise, how can the Council help?
  12. What does 1 in 100 and 1 in 20 mean?
  13. What can I do to protect my property during flooding?
  14. How do I minimise health risks following a flood?
  15. I have questions regarding my contents/building insurance, who should I contact?  How will flooding affect my house sale?
  16. Why does the local authority allow development on flood plain area?
  17. I am interested in forming a local community group to tackle flooding or ditch related issues in my neighbourhood.  How can I go about doing this?
Who is responsible for the ditch at the bottom of my garden? If a ditch borders your property in any way, then you are responsible for maintaining it.  If you have a fence between your garden and the ditch, the ditch is still your responsibility.  The responsibility lies 50:50 between you and the landowner on the other side of the ditch. What if the ditch is between my property and a public area, e.g. a park? If a ditch borders your property in any way, then you have riparian ownership of the half that borders your property.  If the land on the other side of the ditch is council-owned, then you share the responsibility 50:50 with the council.   This ownership split applies even if there is a fence between your property and the ditch and it appears as though the ditch is within the park boundaries. I have never heard of riparian rights or ownership, when did this come into force? The land drainage byelaws were made under section 34 of the Land Drainage Act 1976.  They are enforced by the Environment Agency by provision of the Water Resources Act 1991 and the Environment Agency Act 1995.  

A copy of the byelaws and a guide to riparian ownership can be obtained by contacting the Environment Agency or Spelthorne Borough Council Environment Services.
If I have riparian ownership of the ditch at the bottom of my garden, am I allowed to extend my property and build on it? If you wish to extend your property over the ditch, you must first obtain permission from the Environment Agency.  If you build on the ditch without permission, you may be interfering with the natural flow of the watercourse.  The Agency has the right to enforce the removal of any obstruction to flow.
If someone is dumping rubbish in the ditch, what should I do? Contact the Environment Agency on 08708 506 506 for guidance. How important is the ditch – I’ve never seen water in it? Even if the ditch no longer appears to by dry, the responsibility to ensure it is kept clear of debris and other obstructions still apply.  The ditch may form a vital part in clearing street or land runoff, especially in times of localised flooding.   What should I do if the road outside my house floods? How can I find out if I am in a flood area? Access the Environment Agency's website which displays a map of flood risk areas. How can I check if there is a flood alert? The Environment Agency's website contains the latest flood alert status.  You can register to receive alerts by telephone or fax, by telephoning 0845 988 1188. Who should I contact if there is a flood? Your first point of call should be the Environment Agency, who have an emergency Floodline 0845 988 1188. If a flood does arise, how can the Council help? The Environment Agency incident hotline is 0800 807060. In an emergency situation, Spelthorne Borough Council will assist Surrey County Council with the evacuation of property-owners. The Council can provide sandbags on a priority basis in this situation. What does 1 in 100 and 1 in 20 mean? This refers to the frequency or likelihood of flooding.  To find out more access the Environment Agency's webpage "Your Questions Answered". What can I do to protect my property during flooding? If possible, it is advisable to move property contents and vehicles to higher ground above flood level.  Sandbags have minimal protection value, but can be provided by the Council at the property-owners request.  The Environment Agency website has a useful list of action points. How do I minimise health risks following a flood? Please take a look at our Environmental Health advice. I have questions regarding my contents/building insurance, who should I contact?  How will flooding affect my house sale? Why does the local authority allow development on flood plain areas? The local authority has an obligation to provide new housing year after year, as imposed by central government.  Where alternatives are available, most local authorities try to avoid approving applications for new developments in known flooding areas.

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