Do I Need Planning Permission for an Extension?
Some extensions can use permitted development rights, but the answer depends on the property, previous changes, location and proposed design.
BuilderFind editorial · 4 min read
Planning and Building Regulations differ
Planning controls the development and its impact, while Building Regulations address matters such as structure, fire safety, insulation and drainage. A project may need one, both or a different approval route.
Check the property history
Rights can be restricted by previous extensions, planning conditions, listed status, conservation areas or an Article 4 direction. Flats generally do not have the same permitted development rights as houses.
Confirm before building
Use the relevant local planning authority and obtain appropriate professional advice. A lawful development certificate can provide useful evidence where permitted development is relied on.