Piers fail when they are too shallow, in the wrong ground, or in a hole you cannot keep open. We dig, we set, we backfill so the next trade can land a bearer or a wall on something that does not move. Under an existing house the access is usually the hard part: a crawl space, a side path, a neighbour's boundary. New-build piers on a cleared block are simpler on the machine, still specific on the levels.
This sits next to carpentry when the deck or the floor is ours as well, and next to excavation when the site is already open. One booking if the same crew is already there. Licensed carpentry is 397254C. The dig is the demolition and excavation crew.
Decks and framing sit on timber framing and timber decking. Piers are the bit in the ground that those jobs stand on.
We inspect, then we quote. Photos of the underside, the side access, and the street help. Call 0487 549 909 or send the suburb and a couple of photos.