Decks & Porches in Aquinnah, Massachusetts

Decks do not qualify for Mass Save rebates. Aquinnah is in Eversource territory, but that is irrelevant to deck permitting. What matters here is the permitting gauntlet. The Gay Head Cliffs and surrounding bluffs are subject to coastal bank and land subject to coastal storm flowage review under the Wetlands Protection Act, administered through the Aquinnah Conservation Commission. Any deck within 100 feet of the coastal bank, a pond, or a stream requires a Notice of Intent and Order of Conditions before a building permit can issue. The town also has its own Historic District Commission, and any exterior change visible from a public way, including a new deck or porch on a period home near the village, may require Historic District Commission approval. Factor at least eight to twelve weeks for conservation and historic review into project timelines.

Aquinnah's building department issues permits under 780 CMR, but coastal location means Conservation Commission review under the Wetlands Protection Act is almost always required first. Frost depth on the Vineyard is typically 36 to 42 inches, somewhat shallower than mainland MA, but local practice often specifies 48 inches for margin. Guardrail height (36 inches), baluster spacing (under 4 inches), and ledger attachment are all inspected. Historic District Commission review may be needed for visible exterior changes.

Deck and porch work on Martha's Vineyard runs substantially higher than mainland MA because of the ferry logistics for materials and crews. Pressure-treated pine decks run $24–$38 per square foot and composite decks run $40–$65 per square foot. A 300-square-foot deck in Aquinnah typically costs $10,000–$20,000 installed, depending on material and site access. Coastal-grade stainless steel hardware, required near salt air, adds $500–$1,200 over standard galvanized fasteners on any project within a few hundred feet of the water.

Aquinnah sits at the western tip of Martha's Vineyard in Dukes County, with 708 residents and 563 housing units. The median home is 46 years old. Aquinnah is home to the Wampanoag Tribe of Gay Head and includes the Gay Head Cliffs, a National Natural Landmark. The town has a very high proportion of seasonal and vacation properties relative to year-round residents, and the coastal bluff setting means nearly every deck project intersects with coastal erosion, Conservation Commission review, or historic district considerations.