Detroit is a low-moderate cost-of-living market — pricing guide and permit rules below.
Detroit hvac rates: $3,000-$10,000 per system. Always get 3 written quotes and verify MI licensing at Michigan LARA (michigan.gov/lara). Sales tax on materials: 6%.
Detroit requires permits when work exceeds $600 or involves full system replacement. Your licensed contractor pulls the permit — if they ask you to pull it, that's a red flag.