State Environmental Planning Policy (Transport and Infrastructure) 2021

Earthworks for the purposes of the development must—

be structurally supported in accordance with subsection (2), and

if the land is not identified as Class 3 or Class 4 on an Acid Sulfate Soils Map—not be more than 3m below ground level (existing), and

if the land is identified as Class 3 or Class 4 on an Acid Sulfate Soils Map—not be more than 1m below ground level (existing), and

be carried out at least 40m from any waterbody (natural), and

if the works are on a lot adjacent to a rail corridor—have a setback at least 3m from the corridor.

Structural support for earthworks more than 1m above or below ground level (existing) must take the form of a retaining wall or other form of structural support that—

has been certified by a professional engineer, and

has adequate drainage lines connected to an existing stormwater drainage system for the site, and

does not redirect the flow of any water or cause sediment to be transported onto an adjoining property, and

is not higher than 3m, and

is separated from any other structural support on the site by at least 2m, measured horizontally.

Fill, for the purpose of the development, must—

not raise the ground level (existing) more than 2m, and

be wholly contained by structural support in accordance with subsection (2), and

be located at least 40m from any waterbody (natural).