Was it a custom home or purchased from the builder in a development? The contract for those guys is pretty air tight. But read it over to see how long they will stand behind things. Sadly poor workmanship seems to be the name of the game in many communities. The emphasis being on how fast they can build them, not how well.
. Our house was built in 01 and has some nice cracks in the driveway and garage as well. They just don't give the full dirt time to properly settle before they start building.