Corbo Construction

Massachusetts has no foundation-contractor license, but the contractor must be Home Improvement Contractor (HIC) registered with the Office of Consumer Affairs, and any structural repair needs a Construction Supervisor License plus a building permit from the Marshfield building department. Significant work like pier underpinning or wall rebuilds requires PE-stamped drawings from a registered Professional Engineer. Because so much of Marshfield is coastal and low-lying, exterior excavation, regrading, or drainage near the harbors, rivers, marsh, or flood zones almost always triggers Marshfield Conservation Commission review under the Wetlands Protection Act, so a dig-out near the shore usually needs a filing first.

Marshfield sits on the South Shore, where costs run near Boston metro but below the city core. A standalone sump pump install runs $1,200 to $3,000, more with the battery backup that matters here given coastal storm outages. A full interior perimeter French drain with a sump usually lands at $8,000 to $20,000 depending on linear feet. Crawl-space encapsulation, common in shoreline cottages, runs roughly $5,000 to $15,000. Single crack injection runs $400 to $900 per crack. Exterior excavation and membrane waterproofing, harder near the high water table, runs $15,000 to $30,000 or more.

Massachusetts requires a written contract and a Home Improvement Contractor registration for most residential foundation repair & waterproofing work; ask for the registration number and check it before paying a deposit.

More on permits, costs, rebates and common questions, plus every other foundation repair & waterproofing contractor serving the town, on the Foundation Repair / Waterproofing in Marshfield page.