Two blocks on the same street can differ by eighty thousand dollars in site costs before a single wall goes up. Here is where that money goes.
By [Name], Director
Buyers usually compare land on price per square metre and position. Builders compare it on what it takes to get a level, dry, serviced platform to build on. Those two views can be a long way apart, and the gap only shows up once someone digs.
A fall of half a metre across a building envelope is ordinary and absorbed in the footing design. A fall of two metres means retaining, engineered footings, more excavation and more spoil to cart away. On steeper Hills blocks we have seen site costs run past a hundred thousand dollars before the slab is poured.
The practical test is not how steep the block looks from the road. It is how much of the fall sits inside the footprint of the house you actually want to build.
The cheapest way to fix a difficult site is to design for it, not to flatten it.
Much of Adelaide sits on reactive clay. A site classified H1 or H2 needs a stiffer raft or piers, and the difference between a slightly reactive site and a highly reactive one can be twenty to forty thousand dollars in concrete and steel. A soil test costs a few hundred dollars and is worth commissioning before you sign a land contract, not after.
A narrow frontage with no side access means everything is craned or carried. Concrete pumps, scaffolding, truss deliveries and waste removal all cost more, and each trade takes longer on site. On tight infill blocks we budget a premium on almost every trade for this reason.
Before you commit to land, get a builder to walk it with you. An hour on site with someone who has built nearby will tell you more than any desktop report. We do this at no cost, including on blocks we have not been engaged to build on, because a client who buys the wrong land is a project that goes badly for everyone.