A garage is a common type of single-storey building, typically constructed to adjoin an existing building, and used for keeping vehicles, as storage space, and so on. The method of connection requires careful consideration, in particular, openings between the extension and the existing building (if there are any), junctions with the existing roof structure, the positions of existing flues, drains, and so on.

A garage can also be constructed as an independent structure which is not adjoined to the main building, or it can be incorporated within the main building.

Building Regulations approval is required for building a garage but planning permission may not be in all instances – the local authority should be able to advise as to whether it planning permission is needed or not. As an outbuilding, a garage may be considered a permitted development which will not require planning permission as long as:

  • It is not forward of the wall forming the principal elevation.
  • It is single-storey with a maximum eaves height of 2.5 m, and maximum overall height of 4 m with a dual-pitched roof, or 3 m for any other roof.
  • It has a maximum height of 2.5 m within 2 m of a boundary.

The first stage of building a garage is to develop a design which lays out the dimensions and features in detail. An important consideration is where side access from the main building will be and whether a section of the existing wall will be able to be taken out to allow for the installation of a door. It is also important to establish how vehicles will access the garage, turn and so on.