State Environmental Planning Policy (Exempt and Complying Development Codes) 2008
3.26 Car parking requirements
(1) At least one off-street car parking space must be provided on the lot on which a new dwelling house is erected.
(1A) Subclause (1) does not apply to a lot that has a width, measured at the building line, of less than 8m.
(2) At least one off-street car parking space must be retained on a lot on which alterations or additions to an existing car parking space are carried out.
(3) A car parking space under this clause may be an open hard stand space or a carport or garage, whether attached to or detached from the dwelling house.