Let's talk about the final inspection first. The final inspection may cost you a few days to make corrections so allow yourself that extra time. If there are problems, they'll most likely be minor things like smoke detectors . People don't install enough of them, put them in the wrong places, wire them wrong, or just forget to put them up. Many people don't always realize they need fire-rated service doors between an attached garage door and the house.
Some homeowners forget to provide access to their attics or crawlspaces.
Codes require stair railings to be a certain height and have a minimum spacing between the spindles. Once the work passes, some building officials will sign your Certificate of Occupancy right on the spot. Even if they find a problem, they may give you a temporary certificate to get you through closing. In other areas, there is a day or more waiting period. Look into these items ahead of time to avoid delays in your schedule.