Surface Water Drainage Assessment (SWDA) Guidance and Validation Tool

The level of detail varies depending on the development type, size and location. To help simplify the process we have developed a web-based validation and advice tool. The webtool can be used:

  • to identify what level of detail is required to meet the validation criteria,
  • provide advice on meeting the requirements and
  • to generate a Drainage Assessment for small developments as a single document ready to be submitted with your planning application; or,
  • to generate a site specific list that can be sent to the drainage engineer

Who should use the SWDA and validation tool?

This replaces the validation checklist so is suitable for everyone and should be used by everyone that wishes to submit a planning application. Using this tool will help ensure it can be validated quickly and that the consultees have all the information to be able to assess the application

Open the drainage assessment tool