Planning Permission or Permitted Development?

A practical guide to help you understand which route may apply to your extension before you move forward.

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Get the PD vs Planning Checklist and sense-check your project before speaking to builders.

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Helping You Understand What Applies

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.

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What The Checklist Helps You Understand

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.

We used Design Spec for a 6-metre kitchen extension and were really impressed with the service. Our project officer, Lauren, was incredible from start to finish and was always responsive, organised, and incredibly knowledgeable.

— Lima