Galaray House

Lexington requires a building permit for window and door replacement, and historic review is the defining wrinkle here. Properties in the town's historic districts — including the Battle Green and East Village districts — fall under the Historic Districts Commission, which reviews any exterior change visible from a public way. The commission generally expects matched-profile wood windows and frequently does not approve standard vinyl on contributing structures. That review adds weeks to the timeline and should happen before ordering. Pre-1978 homes, which describe most of the historic stock, also trigger the EPA RRP lead rule and a lead-certified installer.

Lexington runs at the high end of state pricing. A standard vinyl double-hung sits around $750 to $1,300 installed per opening, but historic-district homes that require custom matched-profile wood windows commonly run $1,500 to $3,500-plus each. Entry doors range from $2,500 to $7,000 depending on whether period-appropriate materials are required. Mid-century modern fixed-glass and slider replacements often run $3,000 to $6,500 per large opening. Pre-1978 homes add $50 to $150 per window for lead-safe work. A historic-home whole-house project can easily exceed $30,000 once custom millwork and review are factored in.

Massachusetts requires a written contract and a Home Improvement Contractor registration for most residential window & door installation work; ask for the registration number and check it before paying a deposit.

More on permits, costs, rebates and common questions, plus every other window & door installation contractor serving the town, on the Windows & Doors in Lexington page.