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Get free email alerts for new extensions applications in the UK
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, whether taller, larger or 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 those drawing a lot of comments, can take longer.
Can I get email alerts for extensions planning applications anywhere in the UK?
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 the UK. 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
UK58,273 applications (this page)England51,601 applicationsScotland3,815 applicationsWales1,899 applicationsNorthern Ireland958 applications
Other application types in the UK
New Homes
13,370 applications
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12,612 applications
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6,892 applications
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10,708 applications
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8,205 applications
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3,703 applications
Telecoms Masts
2,382 applications
Agricultural
4,723 applications
Community & Public Buildings
3,079 applications
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1,098 applications
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4,670 applications
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6,230 applications
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26,248 applications
Data updated daily across all UK active councils.