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Gloved hands insulate copper pipes in the crawl space of a shingled beach cottage

Cohasset · Norfolk County

Cohasset, MA Plumbing Help: Reach An Independent Local Plumber

Pipe leaking, drain backing up, or a wet basement near the Cohasset harbor? Call or send a request to reach an independent plumber who takes Cohasset jobs.

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Cohasset, Massachusetts

Plumbing Help For Cohasset, MA Homeowners

Cohasset is a small coastal town with an unusually mixed set of pipes behind it. Most homes draw from the town's own reservoirs and wellfield, a slice of North Cohasset is served by a different water system, some streets are sewered while other houses still rely on septic, and a few neighborhoods depend on town-owned grinder pumps. Knowing which of those applies to your address is the first step in almost any plumbing call here.

If water is spraying from a pipe, close the main shutoff before anything else. If you smell gas, or sewage has reached the living area, get everyone outside and call 911 or National Grid from there. Once the house is safe, calling or sending a request connects you with an independent local plumber who works in Cohasset.

South Shore Plumber Finder is a go-between for Cohasset households, not a plumbing outfit that performs the repairs. It's a referral site that pairs Cohasset homeowners with independent plumbers and explains, with sources, the local details that shape the job.

Local knowledge

What Cohasset Homeowners Should Know About Their Plumbing

Five local conditions that decide who to call and how a Cohasset plumbing job gets planned.

Two Water Suppliers

The Town Water Department Covers About 90% Of Cohasset

As of its early 2026 web page, the Cohasset Water Department said it supplies about 90% of the town from Lily Pond, the Aaron River Reservoir, and the Ellms Meadow wellfield, with Aquarion serving the rest. The Weir River Water System also lists North Cohasset customers in its 2025 report. Check your bill before reporting a street problem, because the right office depends on your supplier.

Source: Cohasset Water Department (archived page, February 2026)

Sewer Or Septic

Two Sewer Districts, With Septic Elsewhere

The Sewer Commission's account list, as archived in February 2026, showed 1,599 accounts in the Central District and 52 in the North Cohasset District. Homes outside those districts use septic systems, which the Board of Health regulates under Title 5 and the town's own supplemental rules. A plumber needs to know which you have before diagnosing a backup.

Source: Cohasset Sewer Commission (archived page, February 2026)

Grinder Pump Rule

A One-Strike Policy On Town-Owned Grinder Pumps

Since December 18, 2018, the Sewer Commission has applied a one-strike policy to the grinder pumps it owns: after the first clog caused by wipes, floss, or similar items, the resident pays for later service calls. The rule was still posted on the department page archived in February 2026. Keep those items out of every toilet in the house.

Source: Cohasset Sewer Department (archived page, February 2026)

Older Homes

About 28% Of Cohasset Homes Date To 1939 Or Earlier

Census estimates count 910 of the town's 3,244 housing units as built in 1939 or earlier, and the median home dates to 1968. In the older houses around the village center, the harbor, and Beechwood, expect a mix of original and replaced pipe that a plumber should look at before quoting.

Source: U.S. Census Bureau, ACS 2020-2024

Coastal Flood Paths

The Town Has Mapped 166 Coastal Flooding Pathways

A February 2025 memo from the Metropolitan Area Planning Council calls flooding a pressing climate hazard for Cohasset and notes the town has identified 166 coastal flooding pathways. Near the cove and harbor, that is a reason to think about where the water heater, shutoffs, and sump pump sit.

Source: Metropolitan Area Planning Council

Services

Plumbing Services In Cohasset, MA

Each common plumbing job plays out a little differently in Cohasset, where coastal weather, older housing, and a patchwork of water and sewer service shape the work.

Hire smart

How To Hire A Plumber In Cohasset, MA

Plumbing and gas fitting in Massachusetts require a license from the Board of State Examiners of Plumbers and Gas Fitters, and most plumbing work needs a permit from the town's plumbing inspector.

Official lookups

  1. Look Up The License Before Work Starts

    Massachusetts requires plumbers and gas fitters to hold a license from the Board of State Examiners of Plumbers and Gas Fitters. Ask for the license number and confirm it on the state's online license search. Source

  2. Confirm The Permit Is Filed With Building & Inspections

    Cohasset's Building & Inspections office at Town Hall handles plumbing and gas inspections and reviews plumbing plans. Its page, as archived in February 2026, said permits are filed electronically and inspections are arranged by contacting the department, so ask the plumber to file and schedule them. Source

  3. Check The Drainlayer List For Outside Work

    For work on the pipe between the house and a town water or sewer main, the Water and Sewer departments each posted a 2025 list of drainlayers holding a town license. Ask the company you hire whether it is on the current list. Source

  4. Get Every Piece Of The Estimate On Paper

    Ask for labor, materials, the permit, and any wall or yard restoration to be listed separately. If septic or a town grinder pump is involved, ask what part of the job falls to the town or the Board of Health.

Costs

What Affects The Cost Of Plumbing Work In Cohasset?

In Cohasset, the price of a job often turns on what the plumber finds behind old plaster, whether the problem connects to a septic system or a town sewer district, and how far the house sits from the street. Coastal properties can add steps, such as raising equipment or adding protection against salt and storm water.

Get a written estimate that names the permit and inspection, and ask how the plumber will handle surprises once a wall or floor is open. For a large job like replacing a building sewer or repiping an older house, collecting a second written estimate gives you something to compare.

Get a written estimate

Neighborhoods and nearby

Cohasset Neighborhoods And Nearby Towns

Plumbers who take Cohasset calls work from the village center and harbor out to Beechwood, Little Harbor, and North Cohasset. Many also serve neighboring Hingham, Scituate, and Norwell.

  • Cohasset Village
  • Cohasset Harbor
  • Beechwood
  • Jerusalem Road
  • Little Harbor
  • North Cohasset

Nearby Towns

Questions

Cohasset Plumbing Questions

Still not sure? Send a short request and a local pro can answer the specifics.

How much does a plumber cost in Cohasset?

It depends on the problem, the age and type of pipe, how easy it is to reach, and whether a permit is needed. A Cohasset plumber can write up an estimate after seeing the job. Ask what's included, and how hidden problems will be priced if they turn up.

What should I do first if a pipe bursts in my Cohasset home at night?

Close the main shutoff so the water stops, and keep clear of any wet outlets or panels. If the problem looks like it's in the street, the Water Department's directory says after-hours water emergencies go to the Cohasset Police Department. When you call us, you'll be connected with an independent plumber, and how soon they can come depends on their schedule.

Who issues plumbing permits in Cohasset?

Building & Inspections at Town Hall handles plumbing and gas inspections. As of its archived February 2026 page, permits are filed online. A plumber with a Massachusetts license should file the permit and set up the inspection for you.

Is my Cohasset home on town sewer or septic?

Cohasset has a Central sewer district, a smaller North Cohasset district, and homes on septic. Your sewer bill, or a call to the Sewer Commission at Town Hall, will settle it. Septic systems fall under the Board of Health's Title 5 rules.

Why does my Cohasset water bill come from a different company than my neighbor's?

The town Water Department supplies most of Cohasset, but its page says about 10% of town is served by Aquarion, and the Weir River Water System lists North Cohasset customers. Each supplier handles its own mains and meters, so contact the one on your bill about street-side problems.

What should Cohasset homeowners near the harbor know about flooding?

The town has identified 166 coastal flooding pathways, according to a 2025 regional planning memo. Know where your shutoff is, keep the sump pump tested, and ask a plumber whether equipment should be raised. If water reaches the panel or a gas appliance, leave and call 911.

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