The dwelling, together with any garage, garden and outbuildings, normally occupied by the applicant as the applicant's home, including any premises not so occupied which it is impracticable or unreasonable to sell separately, and in particular any croft land on which the dwelling is situated but, notwithstanding regulation 21 (calculation of income and capital of members of applicant's family and of a polygamous marriage), only one dwelling is to be disregarded under this paragraph.