3A.29   Excavation of sloping sites

(1)  Excavation associated with the erection of, or alterations or additions to, a dwelling house or ancillary development (other than a swimming pool) must:

(a)  be not more than 2m below ground level (existing), and

(b)  be constructed using a retaining wall or unprotected embankment that meets the standards of subclause (2) or (3), respectively.

(2)  A retaining wall:

(a)  must not redirect the flow of surface water onto adjoining property, and

(b)  must not extend more than 2m horizontally from any external wall of the dwelling house or ancillary development.

(3)  An unprotected embankment must not extend more than 4m horizontally beyond the external wall of the dwelling house or ancillary development.

(4)  Excavation associated with the erection of, or alterations or additions to, a swimming pool must be not more than the depth required for the pool structure.