You will not need planning permission if the structure is within 2 metres of the boundary and no more than 2.5 metres high.

If the structure is more than 2 metres away from the boundary, then it must be single-story with a maximum eaves height of 2.5 metres, or an overall height of 4 metres if it has a dual-pitched roof.

If the structure has a balcony, veranda or raised platform that is more than 300mm high, you will need planning permission.

The garden room or gazebo must not take up more than 50% of the garden. If it will, planning permission is required.

If you live in a listed building or in a conservation area, you will need planning permission.

If you live in an area of outstanding natural beauty or a national park, you can build without planning permission if the structure is 10 metres squared or less, and situated more than 20 metres from the main house.

Residents in flats (and maisonettes) will need to apply for planning permission.

Wherever you choose for the structure to sit, it cannot be closer to a main or public road then the main house.

If the garden building is being used as a granny annexe or accommodation, you will need to ask for planning permission.

The garden room cannot have an antenna.