Putting a static caravan in the garden is possible. However; it is only allowed after getting permission from local authorities. Some areas permit caravans in residential areas, whereas in others, one must get a planning consent before erecting or putting a static caravan in his residence.
A planning consent is the permission required by many private citizens and property developers to be allowed to build or put a static van in residential areas. One must get a planning consent before changing the use of a plot, constructing a new building or re-developing a new building. One can get further information on putting caravans and other mobile homes in his residence by contacting the local planning authority.