Garden Room Planning Advice & Building Regulations
Buildings outside are generally considered to be permitted development and do not need planning permission. This is subject to these conditions. The building is no higher than 2.5m from the bottom of the building to the top of the roof. That you don’t take up more than 50% of your garden.
It is not to be used for living accommodation. Any outbuilding must be single storey and have a maximum eaves height no greater than 2.5 metres. The maximum overall height must not be more than 4 metres for a dual pitched roof or no more than 3 metres for any other roof.
Any outbuilding must not be used as a self-contained living accommodation, and must not have a TV or Satellite type of aerial. In Areas of Outstanding Beauty for example National parks, the Broads, Conservation Areas and World Heritage sites the maximum size of an outbuilding within 20 metres of any wall of the house will be limited to 10 square metres.
Over 15m2 and up to 30m2 needs to be a minimum 1m from any boundary. This is only a guide please contact your local authority for further information.