Foundation Repair / Waterproofing in Tisbury, Massachusetts

Tisbury is in Eversource territory, not a municipal light plant, so homeowners are eligible for Mass Save. Mass Save does not pay for foundation repair or waterproofing, which are structural and not energy measures, so ignore any pitch tying a sump or drain to an energy rebate.

The genuine overlap on the Vineyard is crawl-space encapsulation and basement air-sealing and insulation, which can qualify under Mass Save weatherization after a free Home Energy Assessment, often subsidized around 75% up to program caps. Given how common damp crawl spaces are in Tisbury, that encapsulation angle is the real money-saver. Radon mitigation can ride along with sump work but is not a Mass Save measure.

Massachusetts has no foundation-contractor license, but your contractor must be HIC-registered, structural repair needs a Construction Supervisor License and a building permit from the Tisbury building department, and significant work requires PE-stamped drawings. On Martha's Vineyard, the Martha's Vineyard Commission can review projects with regional impact, and coastal and wetland proximity puts most exterior excavation, regrading, or dig-outs under the Conservation Commission and the Wetlands Protection Act. Near the harbor and shoreline, expect those reviews to drive the timeline.

Island pricing runs well above mainland rates because materials barge over and labor is limited. A single crack injection typically runs $400–$900 but trends higher here. An interior perimeter French drain with a sump pump usually lands $8,000–$20,000 and up given access. Crawl-space encapsulation, a common Tisbury project, runs $5,000–$15,000 and higher with island logistics. A standalone sump pump runs $1,200–$3,000. Settlement repair with helical or push piers runs about $1,500–$3,000 per pier before island add-ons.

Tisbury is the Martha's Vineyard town centered on Vineyard Haven, in Dukes County, with about 4,809 year-round residents but roughly 3,126 housing units, many of them seasonal homes. The median home is around 47 years old, a mix of older village houses near the harbor and newer construction inland.

The island's sandy and variable coastal soils, a high water table close to the harbor, and salt air shape foundation work here. Crawl spaces are common, and damp, poorly drained crawls plus seasonal closing and reopening of homes drive a lot of moisture, settlement, and corrosion issues. Barge-shipped materials and limited island labor also affect every project.