The Pearl Company

File with the Mashpee Building Department under 780 CMR. Any attached deck requires a building permit with footing and framing inspections. A very large portion of Mashpee lots are within 100 feet of coastal bank, pond, or mapped wetland, requiring a Notice of Intent with the Mashpee Conservation Commission before the building permit issues. Footings must reach 48 inches below grade. Guardrails are required on surfaces 30 or more inches above grade, at least 36 inches tall with baluster spacing under 4 inches.

Deck costs on Cape Cod run above the state midpoint, driven by high contractor demand in the summer season and material transport to the Cape. A 300-square-foot pressure-treated deck in Mashpee typically costs $16,000 to $24,000 installed. Composite decking (Trex, TimberTech, Azek) at that size runs $24,000 to $38,000. Coastal exposure near Popponesset Bay and the ponds makes composite and PVC a strong long-term value. Conservation Commission filing adds $500 to $1,500 in costs and four to six weeks to the timeline. Scheduling work off-season (October through April) typically gets better contractor availability and sometimes better pricing.

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 Mashpee page.