In many cases, Permitted Development Rights allow you to extend your home without the need for full planning permission, provided certain criteria are met.
For example:
- A single-storey rear extension to a detached house can typically extend up to 4 metres beyond the original rear wall.
- For semi-detached or terraced houses, the limit is usually 3 metres.
- A two-storey rear extension may also be possible under Permitted Development but is limited to a maximum depth of 3 metres and must be attached only to the original part of the house.
Even within these allowances, restrictions apply. These include:
- Maximum height limits
- Use of materials that match the existing house
- Rules around proximity to boundaries and neighbouring properties
In all cases, especially when relying on Permitted Development, it’s advisable to apply for a Certificate of Lawfulness to confirm that the works are legally permitted.
If your property is in a Conservation Area, is a Listed Building, or falls under other local planning constraints, Permitted Development may not apply, and full planning permission could be required.
At HPA, we help homeowners navigate these regulations with confidence, ensuring your extension is not only compliant, but thoughtfully designed to suit your needs and add lasting value to your home.