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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
UK48,010 applicationsEngland42,144 applications (this page)Scotland3,261 applicationsWales1,500 applicationsNorthern Ireland1,105 applications
Other application types in England
New Homes
7,740 applications
Change of Use
7,494 applications
Commercial & Major Works
4,068 applications
Demolition
8,211 applications
Listed Buildings
2,516 applications
Solar & Renewables
1,858 applications
Telecoms Masts
1,237 applications
Agricultural
2,701 applications
Community & Public Buildings
1,701 applications
Shopfronts
708 applications
Signs & Adverts
2,922 applications
Utility & Infrastructure
3,885 applications
Trees & Landscaping
15,624 applications
Data updated daily across England's active councils.