its just good to have the peace of mind to know your stuff is good to go. Might not be the best craftsmanship, but at least you know the electrical isn't going to fry. Much harder to fix once you get the dry wall on.

HOwever, if you are a certified/qualified craftsman, or have buddies that can make sure you're good, then no need.

Really, its the city/county's way of making sure things are safe, making sure you're paying proper taxes against improved property (turning coin), and in return you get a higher valued home....