A mechanical contractor for the whole project
New buildings and major renovations depend on systems most people never see: drain and vent stacks, water and gas piping, and the heating equipment that has to hold temperature through a Northland winter. Carlson Duluth Company is a full-service mechanical contractor serving the Twin Ports and surrounding areas. We handle residential and commercial plumbing, heating and cooling installations for builders, owners and property managers.

Construction is in the family history. In the early 1900s, Carlson Bros. Plumbing and Heating grew with the construction boom in West Duluth. Later, a Carlson-led firm worked on federal hydroelectric dams and military installations, and in 1963 Elmer Carlson expanded into plumbing and heating construction. Today that experience continues under Jeremy Carlson, a licensed Master Plumber.
When to bring us in
- You are building a new home and need plumbing, heating and gas piping from rough-in to final
- A commercial build-out or renovation needs new restrooms, a mechanical room or a new heating plant
- A multifamily or condo project needs plumbing and heating across many units
- An older commercial building needs its boiler, water heater or piping replaced
- You want geothermal, radiant floors or a high-efficiency system designed in from the start
The earlier we are involved, the easier it is to plan pipe routes, equipment space and venting, and the fewer surprises there are when walls close up.
What is included
- Commercial construction
- Residential new construction
- Drain, water and gas pipe installation
- Bathroom, kitchen and laundry fixture installation
- Geothermal (geo source) heat
- Boiler and furnace installation
- Water heater installation
- Sump pump installation
Our process
We start with the plans and a conversation about the building’s use, budget and schedule. From there we provide a free estimate and a clear scope. During construction we rough in drain, waste, vent, water and gas piping, coordinate inspections, and set fixtures and equipment at trim-out. Heating and cooling equipment is selected for the building: Lennox furnaces from 80% to 98.2% AFUE, Weil-McLain and Knight boilers, Rinnai tankless water heaters and Mitsubishi Electric heat pumps, many of them Energy Star qualified. At the end we start up and test every system and walk the owner or facility manager through operation and maintenance.
Built for commercial demands
Commercial work has its own requirements. Offices, restaurants, healthcare spaces and condo buildings need systems that meet code, pass inspection on schedule and keep running with little downtime once people move in. We plan for access to valves, cleanouts and equipment so future service is straightforward, and we coordinate closely with the general contractor and the other trades so our work never holds up the next crew.
Projects we are proud of
Our commercial and multifamily work includes Bell Bank on Arrowhead Road and its mechanical room, a commercial water heater installation, a church boiler replacement, the Swanson Youngdale Building, Interim Healthcare, Hansons Auto Service, Grandmaison Photographic Studios, South Pier Shores Condos, Lake Superior View Condos and the Bluffs Ridge Development. On the residential side, our portfolio includes a new home in Rice Lake.
Why Carlson Duluth Company
Our Duluth plumbers are union trained and highly skilled craftsmen, and with more than four generations of experience we can handle any size project. Because we are also a service company, we build systems we know we will be maintaining for years, which keeps us focused on clean, accessible, code-compliant installations. Owners get one accountable contractor for plumbing and heating instead of several.
Area served
We work on commercial and new construction projects in Duluth, Superior, Hermantown, Proctor, Cloquet, Rice Lake and across the Twin Ports region. To bid a project or talk through a new build, call (218) 727-0063 or send us your plans for a free estimate.