State Environmental Planning Policy (Exempt and Complying Development Codes) 2008
3A.34 Fences and retaining walls
(1) A fence and any associated retaining wall located within the setback area from a primary road must:
(a) not be more than 1.2m above ground level (existing), and
(b) be open for at least 50 per cent of the upper ⅔ of the area of the fence, and
(c) in relation to any brick or other solid portion of the fence above 600mm, be not more than 250mm wide.
(2) A fence and any associated retaining wall located behind the setback area from a primary road or any side or rear boundary fence must not be more than 1.8m above ground level (existing).
(3) A retaining wall or embankment that is not subject to Subdivision 6 must not have a height above or below ground level (existing) of more than:
(a) 600mm at any distance up to 500mm from a side or rear boundary, or
(b) 1m at any distance more than 500mm from a side or rear boundary.
(4) The fence or the fence and associated retaining wall on a sloping lot may be stepped, provided the height of each step is not more than:
(a) 1.6m above ground level (existing) if it is located within a setback area from a primary road, or
(b) 2.2m above ground level (existing) in any other case.
(5) If the land on which a fence or retaining wall is to be erected is bush fire prone land, the fence or retaining wall must be constructed from non-combustible materials.
(6) All fill on a lot that is not subject to Subdivision 6 must be retained by a retaining wall.
(7) Fill more than 150mm deep must not occupy an area of more than 50 per cent of the landscaped area of the lot.