San Marcos is a low-moderate cost-of-living market — pricing guide and permit rules below.
San Marcos window replacement rates: $2,500-$8,000 per system. San Marcos's humidity and storms make regular maintenance essential. Always get 3 written quotes and verify TX licensing at Texas TDLR (tdlr.texas.gov). Sales tax on materials: 8.25%.
San Marcos 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.