Lausier Brothers, Inc.

Massachusetts requires a licensed plumber and a plumbing permit for water heaters, repiping, drain and sewer lines, and rough-ins, filed through the Salem building department. Gas work needs a separately licensed gas fitter and a gas permit. Salem's strong historic-district protections (McIntire, Derby Street, and others) add review for any exterior change, and antique homes require careful routing of new lines through plaster walls and balloon framing. Interior plumbing usually proceeds without historic review, but exterior venting or service work near the street face may need approval.

Salem sits in the North Shore / eastern-MA cost band, above central and western MA. A standard tank water heater typically runs $1,900–$3,400 installed; a heat-pump water heater $2,700–$4,700 before the Mass Save rebate; a tankless gas unit $4,500–$7,200. Whole-house repiping of an antique home commonly lands $10,000–$22,000 — higher than newer stock — because of plaster-wall access, balloon framing, and the volume of galvanized and cast-iron being replaced. Coastal corrosion can shorten fixture and connection lifespans near the harbor.

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

More on permits, costs, rebates and common questions, plus every other plumbing contractor serving the town, on the Plumbing in Salem page.