Boston Exterior Remodeling

Westwood's building department requires a permit when a window or door project changes the opening size, structural framing, or egress configuration. Like-for-like full-frame replacement in the existing rough opening generally doesn't need a permit, which covers most work on the town's mid-century homes whose openings already meet modern egress. Adding or enlarging openings for new patio or French doors — common on Westwood's larger homes opening to rear yards — does require a permit. The pre-1978 share of the stock falls under federal lead-safe RRP rules, adding roughly $50–$150 per opening; many newer homes fall outside that.

Westwood sits in the upper inner-128 pricing band — higher than the outer suburbs because of the affluent market and the preference for premium units. Standard vinyl full-frame window replacements typically run $750–$1,300 per opening installed, but Westwood projects more often spec wood-clad or composite units at $1,700–$3,500 per opening. Entry-door replacement runs $2,600–$6,000-plus installed for architectural units with sidelights. High opening counts on large homes and the premium material mix are the main local cost drivers.

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 Westwood page.