Meta Description: Compare 8 Duluth MN plumbers for 2026, with verified services, Twin Ports locations, Minnesota licensing tips and practical advice on frozen pipe emergencies.
Finding good Duluth MN plumbers matters more here than in most cities. Lake Superior winters push frost deep into the ground, older housing stock in neighborhoods like Lincoln Park, Lakeside and Duluth Heights still runs on aging supply and sewer lines, and a burst pipe in January is an emergency, not an inconvenience. This guide to the top plumbers in Duluth, MN for 2026 covers contractors based in Duluth, Minnesota and the immediate Twin Ports area, including Hermantown, Proctor and Superior, Wisconsin.
Every firm on this list was checked on its own website for the services it offers, where it is based and any licenses or certifications it claims. Where a company lists a Minnesota license number or a founding year, we say so. Where it does not, we leave that detail out rather than guess. The list mixes large mechanical contractors that handle commercial projects with smaller owner-run shops and drain and sewer specialists, so read the “Best For” notes to match a firm to your job.
Plumbers In Duluth, MN At A Glance
Company
Based In
Best For
Known For
A.G. O’Brien Plumbing & Heating Co.
Hermantown, MN
Homeowners and commercial clients wanting an established firm
Serving the Northland since 1934
Carlson Duluth Company
Duluth, MN
Boiler, water heater and sewer line replacement
Trenchless pipe lining and 24/7 emergency plumbing
ASP (All Service Professionals)
Hermantown and Duluth, MN
Households wanting plumbing, HVAC, electrical and septic from one company
Four Northland locations and drain jetting
Kalkbrenner Plumbing & Heating
Duluth, MN
West Duluth, Proctor, Esko and Cloquet homeowners
Family owned, backflow testing, 30+ years
Stone Plumbing & Heating
Duluth, MN
East Duluth and North Shore properties
Plumbing, heating and sewer cleaning with 24/7 service
Belknap Plumbing, Heating & Cooling
Superior, WI
Twin Ports clients needing work in both states
Minnesota and Wisconsin master plumber credentials
Bill’s Plumbing & Heating
Duluth, MN
Remodels, repiping and hydronic heating
Father and son origins, gas piping
Premier Plumbing and Heating
Duluth, MN
Repairs, water heaters and bathroom remodels
Publishes its master plumber and contractor license numbers
A.G. O’Brien Plumbing & Heating is one of the oldest plumbing companies in Duluth and the surrounding area. Its offices and fabrication shops sit in the Hermantown Industrial Park, a few minutes from Duluth, and the company lists residential plumbing and HVAC, commercial services and sheet metal fabrication. It serves St. Louis, Douglas, Carlton, Pine, Itasca, Cook and Bayfield counties.
The firm says it has been “proudly serving the Northland since 1934.” Its history page traces the business from founder Adam George O’Brien, an Irish immigrant, through the Adatte family, who took over in 1971 and started a commercial plumbing, heating and ventilation division. The Duluth News Tribune reported that Chris Adatte, the third generation of his family to lead the company, took ownership on January 1, that the company had about 92 employees, and that a remodel of its Hermantown facility added a training space for complex commercial systems. Commercial jobs the paper named include the Black Bear Event Center and the Hermantown Ice Arena.
A.G. O’Brien suits homeowners who want an established company with a deep bench of technicians, and commercial property owners or general contractors who need plumbing, heating and in-house sheet metal handled by one firm.
Carlson Duluth Company is a plumbing, heating and HVAC contractor at 4415 Venture Ave in Duluth, with a separate service page for the Superior, Wisconsin side of the Twin Ports. Its site lists furnace and boiler repair for homes and businesses, mini splits and air conditioning, tankless water heaters, remodeling, and pipe lining and excavation for sewer and water lines.
The company says its plumbers are union trained and cites “over four generations of experience.” It offers 24/7 emergency plumbing and also sells plumbing products. Its Hermantown Area Chamber listing notes that it installs Knight boilers and Rinnai tankless water heaters and handles sewer and water line replacement, including trenchless pipe repair, which can save a torn up yard or driveway. The site also lists utility and manufacturer rebate programs and financing, and describes a volunteer furnace and air conditioning installation for the Lincoln Park Children and Family Collaborative.
Carlson Duluth is a strong fit for homeowners replacing an old boiler or water heater, and for anyone facing a failing sewer lateral who wants to ask about lining the pipe before committing to a full dig.
ASP, short for All Service Professionals, is a home services company with addresses at 4411 Venture Ave in Duluth and 5028 Miller Trunk Highway in Hermantown, plus locations listed in Cloquet and Two Harbors. Its plumbing work includes drain cleaning and jetting, water heater installation, garbage disposal and toilet repairs, and preventive maintenance, alongside heating, air conditioning, electrical, septic pumping, fireplaces and duct cleaning.
The company’s Hermantown Area Chamber profile says ASP traces back to Summit Mechanical Service, founded in 2000, began serving commercial and multi-unit projects in 2001, and merged with Summit in 2019. The same profile notes a specialty in custom radiant in-floor heating and 24-hour emergency service Monday through Saturday. ASP’s site says it employs licensed plumbers, electricians and HVAC technicians and displays a Minnesota license number in its footer. Its stated service area runs from Proctor, Esko and Carlton to Silver Bay and Moose Lake, and across the bridge to Superior and South Range.
ASP suits households that would rather call one company for a clogged drain, a furnace problem and a panel upgrade, and rural properties around Duluth that also need septic pumping.
Kalkbrenner Plumbing & Heating is a family owned and operated company at 12802 W. 9th St. in Duluth, on the far western edge of the city. It serves Duluth, Hermantown, Proctor, Esko, Cloquet, Carlton and Wrenshall, which makes it a practical choice for homes on the west side and in Carlton County.
The company says it has served the Duluth area for more than 30 years and that its technicians are licensed, insured and trained. Its plumbing list is detailed: backflow prevention and testing, leak detection and repair, drain cleaning, sump pumps, standard and tankless water heaters, and bathroom renovation. On the heating side it sells, installs, maintains and repairs boilers and works on garage unit heaters, which matters in a city where many homes still run on hot water heat. Kalkbrenner also advertises upfront pricing, guaranteed on-time arrival and emergency service outside normal business hours.
Kalkbrenner is best for homeowners in West Duluth, Gary-New Duluth, Proctor and the Esko and Cloquet area who want a family run plumber that also understands boiler systems, and for commercial properties that need annual backflow testing.
5.Stone Plumbing & Heating — Plumbing, Heating And Sewer Cleaning For Duluth And The North Shore
Stone Plumbing and Heating Inc. is based at 5065 Jean Duluth Road, on the northeast side of Duluth. The company offers plumbing, heating, and sewer and drain cleaning for residential and commercial customers, and it lists a service area covering Duluth, the North Shore, Two Harbors, Silver Bay, Esko and Proctor.
The firm says it has more than 20 years of experience and describes its plumbing work as covering everything from emergency repairs to new installations. It offers 24/7 emergency service for leaks, clogs and heating system failures, a useful detail for cabins and homes up the shore where a failed boiler in a cold snap can freeze pipes quickly. Its site also notes a “Best of the Best” plumbing service award for 2026. Stone keeps sewer and drain cleaning in house rather than referring it out, so a single company can handle both a backed up main line and the fixture repair that follows.
Stone Plumbing & Heating is a good match for homeowners in Lakeside, Woodland and the Jean Duluth corridor, and for North Shore property owners in Two Harbors and Silver Bay who want a Duluth plumber that will make the drive.
Belknap Plumbing, Heating & Cooling is based at 1414 Belknap Street in Superior, Wisconsin, directly across the bridges from Duluth. The company describes itself as a full-service plumbing company and serves Superior, Duluth, Hermantown, Cloquet, Gordon and Ashland. Its work covers water and sewer lines, fixtures, drain cleaning, new construction, remodeling, boilers, water heaters, septic tanks and holding tanks.
Belknap’s certifications page lists both a Minnesota Master Plumber and a Wisconsin Master Plumber credential, along with ASSE certification, Minnesota Backflow Protection certification, Certified Lead Company status, air source heat pump certification and Fujitsu certification. It also offers RPZ backflow testing and repair. Wisconsin’s Focus on Energy program lists Belknap as a Trade Ally for heat pumps, heat pump water heaters, residential HVAC and water heaters, which can help Superior homeowners line up efficiency incentives. The site advertises workmanship and parts guarantees.
Belknap is the natural pick for property owners with buildings on both sides of the Twin Ports, for homes with lead service lines, and for rural customers who need septic or holding tank work alongside regular plumbing.
Bill’s Plumbing and Heating LLC is located at 4130 W. Arrowhead Road in Duluth, near the Hermantown line. The company handles residential and commercial work, and its service list leans toward bigger projects as well as repairs: new construction, remodels and additions, whole-house repiping, kitchen and bathroom plumbing, and fixture installation and repair.
The company says it started as a father and son team and has grown its offerings while trying to keep its service personal. On the heating side it works on boilers and hydronic heating, and it also lists natural gas and LP gas piping, water heaters, and sump and ejector pumps. That combination is useful for older Duluth homes where a remodel often turns up galvanized supply lines that should be replaced, or for houses outside city gas service that run on propane. Bill’s publishes two direct phone numbers and an owner email on its site, which tends to mean you reach a person rather than a call center.
Bill’s Plumbing & Heating fits homeowners planning a bathroom or kitchen remodel, an addition or a whole-house repipe, and owners of homes with hot water or radiant heat who want the plumber and the heating tech to be the same company.
Premier Plumbing and Heating LLC is a locally owned and operated contractor based in Duluth, MN, serving Duluth, Hermantown, Cloquet and Esko. Its services include plumbing repairs, water heater repair and replacement, heating, drain cleaning, new home plumbing, boiler installation and service, and kitchen and bathroom remodeling.
What sets Premier apart on paper is transparency about credentials. Its website lists a Minnesota master plumber license number (PM095081) and a plumbing contractor license number (PC797003), and states that the company is licensed and insured. That makes it easy to confirm both licenses yourself in the Minnesota Department of Labor and Industry lookup before you hire. The company describes its team as having more than 20 years of combined service, offers 24/7 emergency service and provides free estimates.
Premier is a sensible choice for homeowners who want a smaller local shop for repairs, water heater swaps or a bathroom remodel, and who like being able to check a contractor’s license numbers before the first visit.
How To Choose A Plumber In Duluth, MN
Is The Plumber Licensed By The State Of Minnesota?
Minnesota licenses plumbers at the state level through the Minnesota Department of Labor and Industry (DLI), not the city. A business that contracts for plumbing work in a community of more than 5,000 people, which includes Duluth, needs a full plumbing contractor license, must name a responsible individual who holds an active master plumber license, and must carry a $25,000 surety bond. Individual plumbers hold master or journeyworker licenses, and unlicensed workers must be directly supervised. DLI offers a free license lookup on its website, so ask any of the plumbers in Duluth MN you are considering for their contractor license number and check it before work starts. If the company is based in Superior, confirm it also holds Minnesota credentials for work on the Duluth side.
Do They Offer True 24/7 Emergency Service For Frozen Pipes?
Duluth regularly sees stretches well below zero, and frozen or burst pipes are the most common winter emergency. Ask whether “24/7” means a technician will come out at night and on weekends, or only that someone answers the phone. Ask how they thaw lines (heat tape, warm air, or electric thawing equipment for buried service lines) and whether they handle the water damage cleanup or refer it out. Save the number of an emergency plumber before the first cold snap, not during it.
Can They Handle Boilers And Hot Water Heat?
Many older Duluth homes heat with boilers and radiators or radiant floors, and a failed boiler in winter quickly becomes a plumbing problem. Several plumbing companies in Duluth are combined plumbing and heating contractors. If your home runs on hot water heat, favor a firm that services boilers directly so one visit can cover both the heating system and any pipes at risk of freezing.
Do You Need A Plumber Or A Sewer And Drain Specialist?
For a leaking fixture, a water heater or a remodel, a general plumbing contractor is the right call. For a main line that keeps backing up, root intrusion, a frozen sewer lateral or septic pumping, a sewer and drain specialist with jetting and camera equipment may diagnose the problem faster. Outside sewer and water line work also falls under separate Minnesota rules for licensed contractors and bonded pipelayers, so ask who will actually do any digging.
How Should You Compare Quotes?
Get at least two written estimates for larger jobs such as repiping, water heater replacement or sewer line repair. Check that each quote names the license holder, says who pulls the permit, spells out equipment brands and warranties, and lists any rebates the contractor will help you claim. On sewer jobs, ask whether trenchless lining is an option before you agree to excavation.
Conclusion
The Duluth MN plumbers on this list range from A.G. O’Brien, which has served the Northland since 1934, to smaller owner-run shops across Duluth, Hermantown and Superior. Start with the type of job you have, confirm the contractor’s license with the Minnesota Department of Labor and Industry, and line up an emergency plumber before winter arrives. Every company here was checked for a real base in Duluth, Minnesota or the immediate Twin Ports area.
For more local service providers, browse our Duluth, MN hub. If your project also involves a furnace, boiler or air conditioning upgrade, see our list of the top HVAC companies in Duluth, MN.
