T&T Building contractors

Building permits for decks in Marlborough are filed with the Marlborough Building Department under 780 CMR. Standard inspection points: ledger-board flashing and through-bolt hardware, 48-inch frost footings, 36-inch guardrails, and baluster spacing under 4 inches. Marlborough has a full-service building department that handles residential deck permits routinely, with turnaround typically one to two weeks. No historic district overlay applies to most Marlborough residential neighborhoods.

Deck costs in Marlborough sit in the mid-range for Middlesex County, slightly below the Boston inner-suburb rate. Pressure-treated pine decks run $17 to $27 per square foot installed; composite or PVC systems run $29 to $45 per square foot. A standard deck rebuild on a Marlborough colonial or split-level runs $20,000 to $40,000 for 300 to 400 square feet. Lake-frontage properties on Williams or Boon often see higher costs because of site access and any Conservation Commission conditions on materials. Three-season porch additions start around $29,000.

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

More on permits, costs, rebates and common questions, plus every other decks & porches contractor serving the town, on the Decks & Porches in Marlborough page.