Foundation Repair / Waterproofing in Chilmark, Massachusetts

Mass Save does not cover foundation repair or waterproofing. The program funds heating, cooling, water heating, and weatherization, not structural work or drainage, so ignore any pitch tying foundation work to an energy rebate.

The overlap that matters on the Vineyard is crawl-space encapsulation combined with air-sealing and insulation. Chilmark is Eversource territory and not a municipal light plant, so homeowners qualify for Mass Save. A free Mass Save Home Energy Assessment can unlock air-sealing and crawl-space or floor insulation, often subsidized at 75 percent or more up to program caps, which is relevant in Chilmark because so many homes sit over vented crawl spaces that stay humid. Radon mitigation is not a Mass Save measure but is sometimes added during the same sealing work.

Massachusetts has no foundation-contractor license, but the contractor must be a registered Home Improvement Contractor. Structural work like underpinning or pier repair needs a Construction Supervisor License and a building permit from the Chilmark building department, with PE-stamped drawings for significant structural repair. Coastal jurisdiction is central here: excavation, regrading, or drainage near the shore, ponds, or wetland resource areas falls under the Conservation Commission and the Wetlands Protection Act, and getting equipment and materials to the island by ferry or barge adds real cost and lead time.

Island pricing runs well above the mainland once ferry or barge freight, limited local crews, and material hauling are factored in. Crawl-space encapsulation, the most common Chilmark project, typically runs $5,000–$15,000 and trends to the higher end here. Settlement repair with helical or push piers runs roughly $1,500–$3,000 per pier with whole projects $10,000–$30,000 or more. A sump pump install is $1,200–$3,000, and crack injection on a poured wall is $400–$900 per crack, all subject to the island access premium.

Chilmark is a Martha's Vineyard town in Dukes County with just 1,561 year-round residents but about 1,613 housing units, more dwellings than people, which captures how much of the stock is seasonal and second-home. The median home is roughly 44 years old, so foundations skew toward poured concrete and block, with a large share of houses raised on crawl spaces and piers rather than full basements.

The island sits on glacial moraine, sandy and well-draining in most places, but coastal humidity keeps crawl spaces damp and salt air is hard on exposed concrete and steel. Crawl-space moisture and settlement on loose fill are the dominant foundation issues here.