Building Work For the purpose of the Building Act 2011, building work means — the construction, erection, assembly or placement of a building or an incidental structure; or the renovation, alteration, extension, improvement or repair of a building or an incidental structure; or the assembly, reassembly or securing of a relocated building or a relocated incidental structure; or the changing of ground levels of land for the purposes of work of a kind mentioned in paragraph (a), (b) or (c) to an extent that could adversely affect land beyond its boundaries; or site work on any land for the purposes of, or required because of, work of a kind mentioned in — paragraph (a), (b), (c) or (d); or paragraph (a) or (b) of the definition of demolition work;or other prescribed work, but does not include work of a kind prescribed for the purposes of this definition as not being building work;