Planning Permission Checker
Check whether your home improvement project is likely to need planning permission or falls under permitted development rights. Covers extensions, loft conversions, and more.
Frequently Asked Questions
What is permitted development?
Permitted development rights allow certain building works without needing to apply for planning permission. For houses, this includes single-storey rear extensions up to 3m (terraced) or 4m (detached), loft conversions up to 40-50 cubic metres, and some outbuildings.
Do I need planning permission in a conservation area?
Conservation areas have stricter rules. Permitted development rights are more limited — for example, you may need permission for cladding, satellite dishes, or extensions that would be permitted elsewhere. Always check with your local council.