Trenton is a moderate-high cost-of-living market — pricing guide and permit rules below.
Trenton window replacement rates: $3,000-$10,000 per system. Always get 3 written quotes and verify NJ licensing at NJ Consumer Affairs (njconsumeraffairs.gov). Sales tax on materials: 6.625%.
Trenton 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.