Foundation Repair / Waterproofing in Aquinnah, Massachusetts

Mass Save does not cover foundation repair or waterproofing. The program funds heating, cooling, water heating, and weatherization, so a sump, drain, or piling repair carries no energy rebate, regardless of any pitch.

The real overlap is crawl-space encapsulation and air-sealing, which is especially relevant in Aquinnah's crawl-space-heavy stock. Aquinnah is served by Eversource and is not a municipal light plant, so homeowners here are Mass Save eligible. A free Home Energy Assessment can unlock crawl-space air-sealing and insulation, often subsidized at 75 percent or more up to program caps, even though the structural moisture-barrier and pier work underneath is not itself rebated. Radon mitigation may tie into a vapor or sump setup but is not a Mass Save measure.

MA has no foundation-contractor license, but the contractor must be HIC registered with the Office of Consumer Affairs. Structural work needs a Construction Supervisor License and a building permit from the Aquinnah building department, and significant structural repair needs PE-stamped drawings. Aquinnah is almost entirely coastal, so exterior excavation, regrading, or drainage near the shore, dunes, or wetlands very likely falls under the Conservation Commission and the Wetlands Protection Act, and much of town lies in flood and barrier-beach zones, which adds elevation and floodplain review.

Aquinnah costs run high because materials and crews reach the island by ferry, and the western tip is the longest haul on Martha's Vineyard. Expect a barge or freight premium on every project. Crawl-space encapsulation, the most common job here, runs roughly $5,000–$15,000 before island freight. A sump pump install is about $1,200–$3,000, more with battery backup. Crack injection runs $400–$900 per crack. An interior perimeter drain with a sump runs $8,000–$20,000, and piling or pier repair on a coastal foundation runs higher still given access and engineering.

Aquinnah sits at the western tip of Martha's Vineyard in Dukes County, about 708 year-round residents but roughly 563 housing units, a gap that reflects how much of the stock is seasonal. Median construction age is near 46 years, so most homes here are later 20th-century summer and second homes on poured-concrete, block, or piling foundations, alongside the Wampanoag community's older houses.

The island setting shapes everything. Many Aquinnah homes sit on crawl spaces or pilings rather than full basements, because of the high water table near the Gay Head Cliffs and the coast. Salt air, clay soils, and seasonal flooding drive damp crawl spaces, slab moisture, and corrosion, more than the deep frost cracking you see inland.