Planning Permission

Do you need Planning Permission for a Garden Room ?
Planning permission regulations were revised and relaxed in 2008. The information provided here is intended as a guide as to how this may affect Garden Rooms.

All garden rooms constructed by Carberry Garden Rooms are under 2.5 metres in height and can be sited near a boundary. Note: If you live in a listed building, flat , maisonette or an area of natural beauty you will need to contact your local authority.

“Outbuildings” are considered to be “permitted development”, not needing planning permission. However this statement is subject to the following conditions:

  • No outbuilding shall be placed on land forward of a wall forming the principal elevation.

  • Outbuildings and garages to be single storey with maximum eaves height of 2.5 metres and maximum overall height of four metres with a dual pitched roof of three metres for any other roof.

  • Maximum height of 2.5 metres in the case of a building, enclosure or container sited within 2 metres of a boundary of the curtilage of the dwelling house.

  • No verandas, balconies or raised platforms.

  • No more than half the area of land around the “original house”* would be covered by additions or other buildings.

  • In National Parks, the Broads, Areas of Outstanding Natural Beauty and World Heritage Sites the maximum area to be covered by buildings, enclosures, containers and pools more than 20 metres from the house to be limited to 10m².

  • On designated land* buildings, enclosures, containers and pools at the side of properties will require planning permission.

  • Within the curtilage of listed buildings any outbuilding will require planning permission.


If you want to put up a garden building the Building Regulations will normally not apply if the floor area of the building is no more than 15m² and contains no sleeping accommodation.

If the floor area is between 15m² and 30m², you will not normally be required to apply for building regulations approval providing that the building contains no sleeping accommodation and it is either at least 1m from any boundary or is constructed of substantially non combustible materials.

If you require further information regarding this topic. Please contact us.