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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
UK48,144 applicationsEngland42,696 applications (this page)Scotland2,792 applicationsWales1,632 applicationsNorthern Ireland1,024 applications
Other application types in England
New Homes
7,510 applications
Change of Use
7,336 applications
Commercial & Major Works
4,129 applications
Demolition
7,991 applications
Listed Buildings
2,784 applications
Solar & Renewables
2,039 applications
Telecoms Masts
1,223 applications
Agricultural
2,917 applications
Community & Public Buildings
1,844 applications
Shopfronts
684 applications
Signs & Adverts
2,729 applications
Utility & Infrastructure
4,006 applications
Trees & Landscaping
18,126 applications
Data updated daily across England's active councils.