What can I build without planning permission?
Enter your address and we\u2019ll show you the permitted development limits for your specific property \u2014 house type, conservation area status, Article 4 Directions, and all.
Enter your property address
We\u2019ll look up planning constraints for your specific address and show you exactly what you can build as permitted development.
England only. Address data from OS National Address Gazetteer.
Enter your address above to see your property-specific permitted development limits.
Or browse the national PD rules guide to understand the framework.
Common permitted development projects
Here are the standard national limits for common projects. Enter your address above to get your property-specific limits.
Extension
Most detached houses can extend 4m to the rear as permitted development. Semi-detached and terraced: 3m. The Larger Home Extension scheme can take this to 8m or 6m with neighbour notification.
Loft conversion
Add up to 50 m³ of roof volume (40 m³ for terraced houses) as permitted development. No front dormers visible from the highway.
Outbuilding
Garden offices, studios, and sheds can be built up to 4m (dual-pitched roof) or 3m (other roof types) within your garden — as long as total coverage stays under 50%.
Solar panels
Roof-mounted solar panels are permitted development on most houses. They must not protrude more than 200mm and must not exceed the highest point of the roof.
Frequently asked questions
Does permitted development apply to all houses?
PD rights apply to most dwellinghouses in England, but can be restricted by an Article 4 Direction, conservation area status, listed building designation, or your title deeds. The tool below checks these for your address automatically.
Are these limits for all council areas?
The limits shown are the national GPDO defaults. Some councils have removed specific PD rights via Article 4 Directions — most commonly in conservation areas or where there has been extensive previous development. The tool flags any local restrictions.
Does this replace the PD checker?
This tool shows you the outer limits — the maximum you could build under PD. The full PD Checker lets you enter exact dimensions and get a definitive verdict on your specific project.
I’m in a conservation area — do PD rights still apply?
Yes, but with additional restrictions. Side extensions, cladding, and certain roof works are not permitted on designated land. The tool flags all of this for your address.
What about flats and maisonettes?
Flats and maisonettes do not have the same Class A–E permitted development rights as houses. If your property is a flat, most PD rights will not apply.