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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 — 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 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
UK48,865 applications (this page)England43,297 applicationsScotland2,855 applicationsWales1,665 applicationsNorthern Ireland1,048 applications
Other application types in the UK
New Homes
9,477 applications
Change of Use
8,880 applications
Commercial & Major Works
5,315 applications
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9,045 applications
Listed Buildings
3,084 applications
Solar & Renewables
2,491 applications
Telecoms Masts
1,504 applications
Agricultural
3,785 applications
Community & Public Buildings
2,243 applications
Shopfronts
835 applications
Signs & Adverts
3,353 applications
Utility & Infrastructure
4,937 applications
Trees & Landscaping
19,274 applications
Data updated daily across all UK active councils.