Regulation 5 Meaning of material change of use
For the purposes of paragraph 8(1)(e) of Schedule 1 to the Act and for the purposes of these Regulations, there is a material change of use where there is a change in the purposes for which or the circumstances in which a building is used, so that after that change—
the building is used as a dwelling, where previously it was not;
the building contains a flat, where previously it did not;
the building is used as an hotel or a boarding house, where previously it was not;
the building is used as an institution, where previously it was not;
the building is used as a public building, where previously it was not;
the building is not a building described in Classes I to VI in Schedule 2, where previously it was; or
the building, which contains at least one dwelling, contains a greater or lesser number of dwellings than it did previously.