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Get free email alerts for new extensions applications in England
Set up alertsFrequently asked questions
When do you need planning permission for a house extension?
Single-storey rear extensions up to 4m (detached) or 3m (semi-detached / terraced) are usually permitted development. Two-storey extensions, anything in a conservation area, or larger projects almost always need a planning application.
What's the difference between planning permission and permitted development?
Permitted development rights let you build certain things without applying for planning permission, subject to specified limits. Anything outside those limits — taller, larger, in a protected area — needs full planning permission.
How long does a householder application take?
The statutory target is 8 weeks from validation. Most simple householder extensions are decided within that window; complex or contested cases (especially with objections) can take longer.
Can I get email alerts for extensions planning applications anywhere in England?
Yes. Click the "Set up alerts" button on this page and you'll get a daily (or weekly) email listing every new extensions application submitted anywhere in England. No need to pick a postcode or draw a map - pick the category once, choose your frequency, and we'll do the rest.
Extensions planning applications elsewhere
UK60,716 applicationsEngland53,834 applications (this page)Scotland3,931 applicationsWales1,953 applicationsNorthern Ireland998 applications
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10,726 applications
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10,246 applications
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5,655 applications
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3,866 applications
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2,810 applications
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1,554 applications
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3,426 applications
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2,638 applications
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1,014 applications
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3,959 applications
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5,500 applications
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22,376 applications
Data updated daily across England's active councils.