Planning Permission Explained: What You Actually Need

Planning permission is one of the most misunderstood parts of building work in the UK. Many homeowners either skip it when they need it or assume they need it when they do not.

Permitted Development Rights

Many common projects do not need planning permission: single-storey rear extensions up to 6m (detached) or 4m (semi/terraced), loft conversions with rear dormers, porches under 3m², and garage conversions.

When You DO Need Permission

You need full planning permission for: two-storey extensions, side extensions near a highway, work exceeding PD limits, change of use, and new builds.

Building Regulations vs Planning

These are completely separate systems. Building regulations control safety and energy standards. Planning controls what you can build, where, and how it looks.

🏡 What about your roof? Many extensions affect rooflines. If you need roof work, our roofing cost guide covers what to expect.

🏠 Improving the whole property? Don't forget home security during building work. Our CCTV guide covers construction-phase protection.