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You are trying ValidFirst in Kingsmere, a made-up example council. Don’t use real personal details.
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  2. 2. Upload and see the findings

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Prior approval: larger single-storey rear extension

For a single-storey rear extension deeper than 3 m (4 m for a detached house) and up to 6 m (8 m detached), under permitted development. The council asks your neighbours and only looks at the effect on them.

What it checks

  • Written description7 checks
  • Plan of the site and extension6 checks
  • Location plan11 checks
  • Proposed elevations9 checks
  • Proposed floor plans8 checks

Start without an account

Up to 15 checks. The trial and everything you upload are erased after 24 hours. Don’t upload documents with other people’s personal details.

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Start from your council’s page with a postcode, and the trial shows that site’s real designations from national planning data.

308 planning authorities in England.