Structural landscaping is work involved in the construction of external landscape features, and non-habitable structures (structures you cannot live in) including:

retaining walls of any material that do not form part of a habitable building fencing, driveways, paths and other paving of any material
cabanas, pergolas, decks and non-habitable shelters
ornamental ponds, water features and other structural ornamentation.

Note: You need a licence to do work to concrete tennis courts and the like, but only if the work is to be done under a contract for other residential building work.

You need a licence to construct or install ornamental ponds and water features and other structural ornamentation that requires development approval, but only if the work is to be done under a contract for other residential building work.

Any contract for structural landscaping can include any specialist work that needs to be done as part of the overall job, and any specialist work can be appropriately subcontracted. However this work must be carried out by the holder of an endorsed contractor licence or qualified supervisor certificate in that specialist category.

To learn more about what is considered structural landscaping, see the Home Building Regulation 2014.