Amendment of regulation 4 of the Building Regulations

4. In regulation 4 (requirements relating to building work), after paragraph (3) insert—

“(4) This paragraph applies in relation to a building where—

(a)building work is undertaken in respect of that building (“relevant work”); and
(b)Part L of Schedule 1 imposes a requirement in respect of the relevant work.
(5) Notwithstanding paragraph (3), upon completion of the relevant work, any building to which paragraph (4) applies must—

(a)comply with Part F of Schedule 1; or
(b)where the building did not comply with Part F of Schedule 1 before the relevant work was begun, be no more unsatisfactory in relation to it than before the work was begun.”.