Rochester is a moderate cost-of-living market — pricing guide and permit rules below.
Rochester plumbing rates: $90-$170/hr. Always get 3 written quotes and verify MN licensing at Minnesota DOL (dli.mn.gov). Sales tax on materials: 6.875%.
Rochester requires permits when work exceeds $15,000 or involves full system replacement. Your licensed contractor pulls the permit — if they ask you to pull it, that's a red flag.