Due to planned maintenance some of our online services are currently unavailable. We expect them to be available again by the evening of Sunday 20 September 2026. We apologise for any inconvenience.
Surface water drainage
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Advice for applicants, agents and developers
Learn about how and why SuDS need to be considered early in the design process
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SuDS general design guidance
Detailed advice for designers about our interpretation of national guidance
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Designer checklists
Checklists to help designers with their planning application submissions
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Groundwater monitoring
Learn about our expectations for groundwater monitoring for all scales of development
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Infiltration testing
Learn about undertaking accurate and compliant infiltration testing
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Interception drainage
Detailed advice about interception drainage and how to show it is achieved
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Contributing areas
Learn how we expect contributing areas to be shown on your plans
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Previously developed sites
Learn the latest requirements for previously developed sites
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SuDS in Flood Areas
Read our position statement on SuDS in Flood Areas
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Lidsey Waste Water Treatment Catchment Area
Understand why our requirements may be different in this catchment
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Watercourses
How to consider watercourses as part of the planning process