Any change in the occupation or use of a building which falls into one of the following descriptions is considered a conversion to which the building regulations apply:
- a building to create a dwelling or dwellings or a part thereof
- a building ancillary to a dwelling to increase the area of human occupation
- a building which alters the number of dwellings in a building
- a domestic building to any other type of building
- a residential building to any other type of building
- a residential building which involve a significant alteration of the characteristics of the persons who occupy, or will occupy, the building, or which significantly increase the number of people occupying, or expected to occupy, the building
- a building so that it becomes a residential building
- an exempt building (in terms of schedule one) to a building which is not exempt
- a building to allow access by the public where previously there was none
- a building to accommodate parts in different occupation where previously it was not occupied