Elgin is a moderate cost-of-living market — pricing guide and permit rules below.
Elgin window replacement rates: $3,000-$10,000 per system. Elgin's freeze-thaw cycles stress systems. Always get 3 written quotes and verify IL licensing at Illinois IDFPR (idfpr.illinois.gov). Sales tax on materials: 10.25%.
Elgin requires permits when work exceeds $500 or involves full system replacement. Your licensed contractor pulls the permit — if they ask you to pull it, that's a red flag.