“A building is designed as a dwelling or a number of dwellings where in relation to each dwelling the following conditions are satisfied – (a) the dwelling consists of self-contained living accommodation; (b) there is no provision for direct internal access from the dwelling to any other dwelling or part of a dwelling; (c) the separate use, or disposal of the dwelling is not prohibited by the term of any covenant, statutory planning consent or similar provision; and (d) statutory planning consent has been granted in respect of that dwelling and its construction or conversion has been carried out in accordance with that consent.”