Pre-purchase building inspection in Southern River

Southern River is one of Perth’s major recent growth corridors, built over former market gardens, horticulture and semi-rural land on the low, wet Pinjarra Plain along the Southern River. The suburb stayed agricultural land until the 2000s because the Pinjarra Plain ground is low-lying and poorly draining in parts, and the conversion of that agricultural land to master-planned residential estates has produced a suburb where the ground beneath the homes carries both the Pinjarra Plain’s seasonal moisture character and the cultivation legacy of the horticultural land that preceded them. A pre-purchase building inspection at Southern River reads for both of those things, and for which estate generation the home belongs to.

The Pinjarra Plain ground is the pre-purchase ground concern on lower-lying blocks. The seasonal moisture behaviour of poorly draining Pinjarra Plain soil — where the water table in the lower positions rises closer to the surface in wet winters than in better-drained suburban settings — shows in the site drainage and subfloor of homes built on those positions. We read those elements closely, because the pre-purchase inspection is when the seasonal moisture record of a Southern River block should be understood rather than discovered by the new owner in their first wet winter.

The market-garden and horticultural cultivation legacy is the second pre-purchase ground concern. Old cultivation compaction, root systems from cleared crops and organic enrichment from intensively worked horticultural soil all affect how the ground behaves under a residential slab. We read the slab and crack pattern for homes on former market-garden lots with that cultivation history as context.

The estate generation determines the building read. The oldest 2000s homes are now over twenty years old, with first-generation AS 3740 waterproofing approaching the end of its first service life. More recent stages carry the building read of their age, and the newest stages are in the new-build pre-purchase read of first-years load on freshly developed former-agricultural ground.

A pre-purchase inspection gives you the building scope on its own, to AS 4349.1, with the defects that matter set out plainly and separated from the cosmetic. In Southern River, where the Pinjarra Plain ground and the estate generation both shape the read, that inspection tells you what you are standing on and when it was built. The report follows within 24 hours.

We run the same inspection across the area, including nearby Gosnells and Canning Vale.