Do I need planning permission for a large shed?
Considering this, what is the maximum size shed without planning permission?
If your shed is less than 2m from your property's boundary, the whole building should not be more than 2.5m high. To avoid planning permission, sheds should be single storey with a maximum eaves height of 2.5m for flat roofs, 4m for dual pitched roofs or 3m in any other case.
Likewise, how big can a summer house be without planning permission?
You can build a summerhouse — referred to in permitted development legislation as an outbuilding — with a twin pitched roof up to four metres in height that's no more than 2.5 metres to the eaves, or of 2.5 metres with a flat roof, without planning permission.
Planning permission is not usually required to convert your garage into additional living space for your home, providing the work is internal and does not involve enlarging the building. A condition attached to a planning permission may also require that the garage remain as a parking space.