Licensed plumbers in Duluth, MN

20 plumbers hold an active licence on the Minnesota Department of Labor and Industry (DLI) register in Duluth, checked 4 Nov 2026: 12 licensed 10 years or more, 100% bonded and none with a complaint or board disclosure on record. Ranked by a published formula; nobody pays to move up.

Active licences: 20
Median time licensed: 14.5 yrs
Bonded: 100%
Lead-Safe certified: 1
Google reviews: 563

Filled tags sit at the business's Google location; hollow tags show its mailing ZIP code only. Each tag is the theoPros score.

1
Kalkbrenner Plumbing & Heating Inc
Duluth, MN · Minnesota DLI Plumbing Contractor #PC643700 · licensed 15 yrs
- Licence active
- Bonded
- No complaints
925.0(243)Full report
2
Northern States Basement Systems Inc
Duluth, MN · Minnesota DLI Restricted Plumbing Contractor #PR644780 · licensed 15 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
895.0(45)Full report
3
Bills Plumbing and Heating LLC
Duluth, MN · Minnesota DLI Plumbing Contractor #PC643660 · licensed 15 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
845.0(12)Full report
4
Guthrie Plumbing & Heating LLC
Duluth, MN · Minnesota DLI Plumbing Contractor #PC645288 · licensed 15 yrs
- Licence active
- Bonded
- Works alone
- No complaints
844.8(20)Full report
5
A W Kuettel & Sons Inc
Duluth, MN · Minnesota DLI Plumbing Contractor #PC643830 · licensed 15 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
805.0(4)Full report
6
The Jamar Company
Duluth, MN · Minnesota DLI Plumbing Contractor #PC644545 · licensed 15 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
794.4(15)Full report
7
R J Mehrman & Sons Inc
Duluth, MN · Minnesota DLI Plumbing Contractor #PC643446 · licensed 15 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
743.9(7)Full report
8
Carlson Duluth Co
Duluth, MN · Minnesota DLI Plumbing Contractor #PC651588 · licensed 14 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
- EPA Lead-Safe
744.0(65)Full report
9
Caldwell Plumbing & Heating Inc
Duluth, MN · Minnesota DLI Plumbing Contractor #PC712119 · licensed 9 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
704.4(21)Full report
10
Carlson Bros Inc
Duluth, MN · Minnesota DLI Plumbing Contractor #PC644056 · licensed 15 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
703.5(12)Full report
11
Advantage Air Plumbing Heating & Cooling Inc
Duluth, MN · Minnesota DLI Plumbing Contractor #PC150082 · licensed 3 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
674.7(82)Full report
12
Shubitz Plumbing & Heating LLC
Duluth, MN · Minnesota DLI Plumbing Contractor #PC645569 · licensed 15 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
663.4(37)Full report
13
Kb Plumbing & Heating
Duluth, MN · Minnesota DLI Plumbing Contractor #PC648160 · licensed 15 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
57No Google reviews yetFull report
14
Rn Plumbing and Heating LLC
Duluth, MN · Minnesota DLI Plumbing Contractor #PC649369 · licensed 14 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
57No Google reviews yetFull report
15
Modern Mechanical and Automation LLC
Duluth, MN · Minnesota DLI Plumbing Contractor #PC772658 · licensed 6 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
44No Google reviews yetFull report
16
Twin Ports Plumbing & Heating LLC
Duluth, MN · Minnesota DLI Plumbing Contractor #PC771273 · licensed 6 yrs
- Licence active
- Bonded
- Works alone
- No complaints
44No Google reviews yetFull report
17
Integrity Mechanical Services LLC
Duluth, MN · Minnesota DLI Plumbing Contractor #PC779769 · licensed 6 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
43No Google reviews yetFull report
18
Premier Plumbing and Heating LLC
Duluth, MN · Minnesota DLI Plumbing Contractor #PC797003 · licensed 4 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
41No Google reviews yetFull report
19
Pro Service Plumbing
Duluth, MN · Minnesota DLI Plumbing Contractor #PC802353 · licensed 4 yrs
- Licence active
- Bonded
- Workers' comp
- No complaints
41No Google reviews yetFull report
20
Micks Plumbing LLC
Duluth, MN · Minnesota DLI Plumbing Contractor #PC802815 · licensed 4 yrs
- Licence active
- Bonded
- Works alone
- No complaints
41No Google reviews yetFull report

Duluth at a glance

Active plumbing licences with a mailing address here: 20.
Median time licensed: 14.5 years. Licensed in the last two years: 0 of 20.
Contractor's bond on the Minnesota DLI record: 20 of 20.
EPA Lead-Safe certified, which the law requires for work that disturbs paint in homes built before 1978: 1 of 20.
Open complaint or disciplinary action on the Minnesota DLI record: 0 of 20.
Plumbing licences here that are no longer active: 6 voluntary termination.
Carry workers' compensation insurance: 16 of 20. Declare no employees (exempt), so must work alone on your job: 3 of 20.
Median pay for plumbers in the Duluth metro is $40.89 an hour (BLS, May 2025).

Homes here

80%

of 41,325 homes were built before 1980 (median year built 1952). Paint in homes built before 1978 may contain lead, and work that disturbs it must be done by a Lead-Safe (RRP) certified firm; 1 of the 20 plumbers here are.

Median home value $268,700 · 57% owner-occupied. Duluth, Census ACS 2024 1-year.

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Questions people ask about plumbers in Duluth

How many licensed plumbers are in Duluth?

20 plumbers hold an active Minnesota Department of Labor and Industry (DLI) licence with a mailing address in Duluth, checked on 4 November 2026. 12 of them have been licensed for 10 years or more.

Does a plumber need a licence in Minnesota?

Yes. Electrical work, security and other low-voltage systems included, plumbing and water conditioning need a licensed contractor whatever the job costs (Minn. Stat. 326B.33, 326B.46 and 326B.55). Roofers and builders working on homes need a residential licence once that work brings in more than $15,000 a year, and a certificate of exemption below it (Minn. Stat. 326B.805). Look for an active Plumbing, Restricted licence.

How do I check a plumber's licence in Duluth?

Ask for the licence number and look it up on the Minnesota DLI website, or search this page. Every plumber listed here was matched to an active licence on the Minnesota DLI register.

Which plumbers rank highest in Duluth?

By our published formula (years licensed, complaint record, bond and insurance, and Google reviews), the top three are Kalkbrenner Plumbing & Heating Inc (92), Northern States Basement Systems Inc (89), Bills Plumbing and Heating LLC (84). Paying or claiming a listing never changes the order.

How much do plumbers charge in Duluth?

Plumbers in the Duluth metro earn a median $40.89 an hour (BLS, May 2025); contractors typically bill about twice the wage to cover insurance, overhead and profit.

Do I need a lead-safe certified plumber in Duluth?

If your home was built before 1978 and the work disturbs paint, yes: the law requires a firm certified lead-safe by the US Environmental Protection Agency. 80% of homes here were built before 1980 (US Census, ACS 2024 1-year), and 1 of the 20 licensed plumbers listed are certified.

Licensed plumbers in Duluth, MN

Ranked list

Questions people ask about plumbers in Duluth