

A lot of homeowners assume they either definitely need planning permission or definitely fall under permitted development. In reality, it often depends on the type of property, the position and size of the extension, previous additions, boundary conditions, and whether any restrictions apply.
Small changes can move a project from one route to the other, which is why this stage often feels more confusing than it should.
The checklist helps you sense-check the common things that affect whether permitted development may apply, including property eligibility, extension type, rear depth limits, height limits, side extension rules, total garden coverage, materials, boundaries, and whether it may be worth applying for a Lawful Development Certificate.