Knoxville is a moderate cost-of-living market — pricing guide and permit rules below.
Knoxville hvac rates: $3,000-$10,000 per system. Always get 3 written quotes and verify TN licensing at Tennessee BLC (tn.gov/commerce). Sales tax on materials: 9.25%.
Knoxville requires permits when work exceeds $25,000 or involves full system replacement. Your licensed contractor pulls the permit — if they ask you to pull it, that's a red flag.