Na Fianna Construction

Massachusetts has no foundation-contractor license, but the contractor must be Home Improvement Contractor (HIC) registered. Structural repair, piers, beams, or rebuilding old stone or brick walls, requires a Construction Supervisor License and a building permit from the Belmont Building Department, with PE-stamped drawings for significant structural work. Exterior excavation, drainage, or regrading near Clay Pit Pond, Beaver Brook, or associated wetlands can fall under the Conservation Commission's jurisdiction through the Wetlands Protection Act, so check before any dig-out near wet ground.

Belmont costs sit in the higher Boston-metro band given labor rates and older homes. Crack injection typically runs $400–$900 per crack on poured or block sections. An interior perimeter French drain with sump pump usually lands at roughly $8,000–$20,000 depending on linear feet. Stabilizing a bowing or cracked masonry wall with carbon-fiber straps or steel beams typically runs $5,000–$12,000, with full rebuilds of failing stone walls higher. A sump pump install runs about $1,200–$3,000, more with battery backup. Crawl-space encapsulation generally falls between $5,000 and $15,000.

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 Belmont page.