I live in a city of ~200k (Grand Rapids, MI). We need a few more permits than you (structural plans, foundation...), but there's nothing prohibiting DIY work. I've found the building department to be fairly DIY-friendly.
Ha. A family member built a ~2,500sq ft, 3 stall garage home near the beltline a few years back with the help of my other family members. One of them had a contractor's license (I think primarily for the discount and credit line at Menards - they never worked as a contractor) but GR was very amenable to self built homes. Just needed the normal inspections (foundation, electrical, plumbing) and it went smoothly.
