Flagstaff is a high cost-of-living market — pricing guide and permit rules below.
Flagstaff window replacement rates: $4,000-$14,000 per system. Always get 3 written quotes and verify AZ licensing at Arizona ROC (roc.az.gov). Sales tax on materials: 8-11%.
Flagstaff requires permits when work exceeds $1,000 or involves full system replacement. Your licensed contractor pulls the permit — if they ask you to pull it, that's a red flag.