Permitted Development Guidelines

The main variables in relation to planning permission for garden rooms/log cabins are the height and location. 

If a garden room has an overall height of less than 2.5 metres it can be placed within 2 metres of the boundary.  If you are able to comply with this then planning permission is not required.  Our flat roof designs cleverly accommodate this rule (please view roof photos in our picture gallery).

However, if you prefer a pitched roof on your garden room, please read the following guide:

For single pitched roofs, you will need to choose a garden room with a maximum height of 2.5 metres at the eaves and 3 metres at the ridge.  The garden room will need to be situated  2 metres or more from the boundary.

For dual pitched roofs, you will need to choose a garden room with a maximum height of 2.5 metres at the eaves and 4 metres at the ridge.  The garden room will need to be situated 2 metres or more from the boundary.

For peace of mind it is possible to easily obtain written confirmation whether planning permission is/isn’t required by submitting a ‘Do I need planning?’ form.  It is normally submitted with a copy of an ordnance survey map for the property with the location of the garden room marked on it and a supporting e-mail with an outline of the usage and a proposed picture of the Garden room.  A response to this is usually provided within 10 days of submitting this application.

We are happy to arrange all of this as our aim is to make the whole process as straight forward as possible for you.

In many cases you won’t need planning permission to build a garden room as they are categorised as ‘Permitted Development’.

A garden room is considered to be permitted development (not needing planning permission), if it meets the following requirements and is of ancillary use to the main house:

  1. No garden building built on land forward of a wall forming the principal elevation of the main house.
    2. Outbuildings should be single storey with a maximum eaves height of 2.5 metres at the back and sides and 3 metres at the front and maximum overall height of four metres with a dual pitched roof.
    3. A garden room must have a maximum height of 2.5 metres if it is built within two metres of the garden boundary.
    4. No verandas, balconies or raised platforms but decking of less than 300mm high is acceptable.
    5. No more than half the area of land around the “original house”* would be covered by additions or other buildings.
    6. In National Parks, the Broads, Areas of Outstanding Natural Beauty and World Heritage Sites the maximum area to be covered by buildings that are more than 20 metres from house must be limited to 10 square metres.
    7. On designated land* garden buildings at the side of properties will require planning permission.
    8. Within the curtilage of listed buildings any outbuilding will require planning permission.

*The term “original house” means the house as it was first built or as it stood on 1 July 1948 (if it was built before that date). Although you may not have built an extension to the house, a previous owner may have done so.

*Designated land includes national parks and the Broads, Areas of Outstanding Natural Beauty, conservation areas and World Heritage Sites.