Residential Building Work (NSW)  
  Defined under the Home Building Act 1989 (NSW) as any work involved in, or involved in co-ordinating or supervising any work involved in:

(a) the construction of a dwelling; or

(b) the making of alterations or additions to a dwelling; or

(c) the repairing, renovation, decoration or protective treatment of a dwelling.

It includes roof plumbing work or specialist work done in connection with a dwelling and work concerned in installing a prescribed fixture or apparatus in a dwelling (or in adding to, altering or repairing any such installation). It does not include work that is declared by the regulations to be excluded from the definition (Section 3 Home Building Act 1989 (NSW)).