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Get free email alerts for new extensions applications in Northern Ireland
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 Northern Ireland?
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 Northern Ireland. 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
UK57,574 applicationsEngland50,979 applicationsScotland3,765 applicationsWales1,883 applicationsNorthern Ireland947 applications (this page)
Other application types in Northern Ireland
New Homes
761 applications
Change of Use
220 applications
Commercial & Major Works
259 applications
Demolition
315 applications
Listed Buildings
76 applications
Solar & Renewables
57 applications
Telecoms Masts
32 applications
Agricultural
158 applications
Community & Public Buildings
139 applications
Shopfronts
17 applications
Signs & Adverts
146 applications
Utility & Infrastructure
98 applications
Trees & Landscaping
21 applications
Data updated daily across Northern Ireland's active councils.