Two jobs, not one: take the active colony down, then stop the next one getting in. Baiting handles an active nest because the workers carry it back, but it runs over weeks and needs return visits to keep stations charged. A trenched chemical barrier around the footings is the stronger move on a house that is currently clear.
What suits yours depends on construction, whether it is stumps or slab, how the drainage sits and where the nest likely is. Paths, pavers and decking all move the price, since a barrier has to carry on underneath them. Quoted in writing after the inspection, with the method set out. Barrier work gets rechecked yearly, because chemical in soil breaks down and wet Geelong winters speed that up.
