Part F Application and Interpretation

38.—(1) Subject to paragraphs (2), (3) and (4) this Part shall apply to any building and where a building contains one or more dwellings to each dwelling separately. (2) The energy efficiency requirements shall not apply to— (a) protected buildings, where compliance with the energy efficiency requirements would unacceptably alter their character or appearance; (b) buildings used as places of worship and for religious activities; (c) temporary buildings with a planned time of use of 2 years or less, industrial sites, workshops and non-residential agricultural buildings with a low energy demand; and (d) stand-alone buildings other than dwellings, with a total useful floor area of less than 50 m2. (3) Regulation 40 shall not apply to— (a) the extension of a dwelling; and (b) the extension of a building other than a dwelling, unless the extension has a total useful floor area that is both— (i) greater than 100 m2; and (ii) greater than 25% of the total useful floor area of the existing building. (4) Regulation 45 shall not apply to the provision or extension of any fixed building service where commissioning is not possible.