Do I need planning permission for a garden room?
Garden rooms, sheds, summer houses and home offices are usually permitted development in England if they meet the outbuilding limits and are used for things that go with the house, not as a separate home.
Check your own garden room, shed or outbuilding in about 20 seconds: we look up your postcode's official conservation area and Article 4 data and apply these rules to your home.
These are the rules for houses in England. Wales, Scotland and Northern Ireland have their own, similar but different. Flats and maisonettes have no householder permitted development rights.
Usually no planning permission needed if
- It is single storey and not in front of the house.
- The eaves are no higher than 2.5m, and the overall height is no more than 4m with a dual pitched roof or 3m with any other roof.
- Within 2m of a boundary, the whole building is no more than 2.5m high.
- With other outbuildings and extensions, it covers no more than half the land around the house.
- It is used for things that go with the house (a home office, gym, hobby room, storage), not as a bedroom or separate home.
- No balcony, veranda or raised platform over 0.3m.
You need planning permission if
- You will sleep in it, or it is a separate annexe.
- It is in front of the house, or in a conservation area at the side of the house.
- Your home is a flat or maisonette: flats have no householder permitted development rights.
- It is within the grounds of a listed building.
- Your permitted development rights were removed by a planning condition or an Article 4 direction (ask the council, or check the planning history of your home).
Building regulations
Usually not if it is under 15 square metres. Between 15 and 30 square metres, usually not if it has no sleeping space and is at least 1m from the boundary or mostly non-combustible. Over 30 square metres, yes. New electrics still need a registered electrician.
Planning permission and building regulations are separate: a project can need one, both or neither.
Also think about
- Power: a new circuit to the garden is notifiable electrical work.
- Trees: digging foundations near trees in a conservation area or under a tree preservation order needs care and sometimes permission.
Questions people ask
Can I put a garden room right up to the fence?
Yes, if it is no more than 2.5m high anywhere within 2m of the boundary. Building regulations may then matter if it is between 15 and 30 square metres and not mostly non-combustible.
Can I sleep in my garden room?
Not under permitted development. Using an outbuilding as a bedroom or annexe needs planning permission and building regulations.
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General guidance from LocalWins, last checked October 2026. It is not legal advice or a planning decision, and every home is different: confirm anything important with your council or a qualified professional.