re: New house build

At the very least, I'd get all the pier areas treated because that is where subterranean termites will make access to the structure.

Also, any areas where wood is in direct contact with the ground if that situation arises.

A lot of this depends on what type foundation you plan on having. The above is for individual piers made of cinder block or brick on top of a concrete footing. Also, if going that route, I'd opt to get the metal termite shields that go between the top of the pier and the wood sills. They will stop any intrusion of termites from the inside of the hollow cinder blocks---and believe me, it they can find a way to get in them, they will.