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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, 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 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
UK58,440 applicationsEngland51,751 applications (this page)Scotland3,822 applicationsWales1,907 applicationsNorthern Ireland960 applications
Other application types in England
New Homes
11,172 applications
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10,708 applications
Commercial & Major Works
5,513 applications
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9,655 applications
Listed Buildings
7,018 applications
Solar & Renewables
3,165 applications
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1,935 applications
Agricultural
3,798 applications
Community & Public Buildings
2,559 applications
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955 applications
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3,932 applications
Utility & Infrastructure
5,217 applications
Trees & Landscaping
25,108 applications
Data updated daily across England's active councils.