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Do I Need Planning Permission for an Extension?

One of the most common questions I get is…
Do I need planning permission for an extension?”
The truth is: not all extensions require it, but rules depend on location, size, and other factors.
This guide will break it all down clearly.
✅ Your extension exceeds 3m (semi-detached) or 6m (detached)
✅ You’re in a conservation area or listed building
✅ It’s a two-storey rear extension
✅ You’re changing the front of the property
✅ Your extension is within permitted development rules
✅ You’re not exceeding 50% of the original garden area
✅ Materials match the existing house
✅ No balconies, raised platforms, or roof changes
💬 Tips to Be Sure
🔍 Check with your Local Authority
👷♂️ Speak to a professional (like me — I’ll keep it simple and honest)
Get Planning Support Now
🛠️ Next week: Garage Conversions — what you need to know before building inside your home.

Do I Need Planning Permission for an Extension?
Do I Need Planning Permission for an Extension? One of the most common questions I get is…Do I need planning permission for an extension?” The


Do I Need Planning Permission?
Find out if you need planning permission for your home extension, loft conversion, or garden project. Clear, jargon-free advice from Plans Made Easy.

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