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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
UK48,010 applications (this page)England42,144 applicationsScotland3,261 applicationsWales1,500 applicationsNorthern Ireland1,105 applications
Other application types in the UK
New Homes
9,812 applications
Change of Use
9,053 applications
Commercial & Major Works
5,319 applications
Demolition
9,219 applications
Listed Buildings
2,812 applications
Solar & Renewables
2,312 applications
Telecoms Masts
1,467 applications
Agricultural
3,479 applications
Community & Public Buildings
2,110 applications
Shopfronts
843 applications
Signs & Adverts
3,503 applications
Utility & Infrastructure
4,753 applications
Trees & Landscaping
16,373 applications
Data updated daily across all UK active councils.