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Business ProfilePlumbers in Bismarck, North Dakota

H.A. Thompson & Sons

H.A. Thompson & Sons

H.A. Thompson & Sons provides plumbing and mechanical contractor services in Bismarck and was founded in 1908. Plumbing service has been a mainstay since its beginning, and residential plumbing is limited to Bismarck and Mandan. For construction projects, it assembles piping systems in a controlled prefabrication shop.

Last Updated October 2, 2026.

Service Area

Bismarck and Mandan.

Active Business Listing

H.A. Thompson & Sons is one of 9 plumbers ProsGrade lists in Bismarck, North Dakota.

Active
Public local listing
Listing details

6 services listed, including Residential plumbing, Commercial plumbing and Water heater replacements. Open 24 hours, 7 days a week. Rated 4.1 from 73 reviews.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

How H.A. Thompson & Sons compares with the other 8 plumbers on ProsGrade in Bismarck, using public Google ratings and review counts.

  • Has more Google reviews (73) than 6 of the 8 other Bismarck plumbers on ProsGrade.

Trust Signals

Open 24 hours as listed; call for current emergency response and fees.

Services Covered

6 services
  • Residential plumbing
  • Commercial plumbing
  • Water heater replacements
  • Bathroom remodels
  • Garbage disposal replacement
  • Natural gas grill piping

Reviews

What customers say

Several customers describe difficult interactions involving communication, scheduling or billing. One customer said the company would not send a different person to assess work problems at home, while another objected to the final bill and described the plumbing supervisor as rude. Positive accounts include a punctual technician who quickly troubleshot and replaced a thermostat, and a customer who appreciated a new water heater and ducts moved out of the walking path.

Customer Reviews

Mike Gayette

The tech was punctual, quick to troubleshoot and replace the thermostat, and the invoice was lower than I expected. Losing heat during a North Dakota winter sucks, but H.A. Thompson & Sons saved the day. Excellent experience all around. Thank you!
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neya st.clair

Thank you Ty for coming and and making our home more comfortable with a brand new water heater and safer by moving the ducts out of the walking path. We appreciate your excellent customer service and we'll call again if we need to Thank you

K Star

VERY UNPROFESSIONAL SERVICE! Go elsewhere unless you want to deal with childish drama & overpriced service. Even the responses to negative reviews are rude while other businesses are apologetic. This business will continue to blame the customer & argue over the internet. 1. They are overpriced, a service call elsewhere is 1/4 the cost. 2. They don’t get you scheduled in a timely manner & you’re looking at a week or more out for a simple service call. 3. They’re rude, gossipy, immature, and have a lying problem.
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Stacy Woldie

Unpleasant interaction over the phone with service rep. H A Thompson must be really busy today. No time to listen. Made me feel like a deadbeat saying I better pay my bill after I expressed concern over the quality of the work. As if, after other major expenditures I've made in the past with them, there has ever been a problem with receiving payments. Argumentative, impatient, making up excuses for the problems caused at my home by H A Thompson. Refusing to send a different person to assess the work that was done. This is no way to treat a loyal customer and person in a position to refer new clients. I am very disappointed.
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Tim K

Think twice! Before hiring this company, I called them to inquire about their pricing. All I was told was the plumber hourly rate, which seemed reasonable, so I booked their services. I don't have anything negative to say about the plumbers work aside from his refusal to tell me how much it was going to cost. That was a red flag to me. My experience changed when the bill arrived in the mail several days later. I was charged for more time than the plumber spent at my house, a gas mileage fee, and ridiculously high prices on the parts that the plumber needed for the repairs. The plumber needed to leave at some point to get specific parts from a store and when he returned, I asked him how much were the parts and he had no answer. After receiving the very high bill in the mail, I immediately called them to inquire why it was so high because I took photos of the parts required and had them priced and it was significantly lower. The person on the phone was Dan, the plumbing supervisor, who was incredibly rude to me on the phone. He explained that the customer does not pay the price that the parts cost from the store, the customer pays their company's up charged new price on the parts. So, be aware that not only do you get charged gas mileage for in town services (which is ridiculous) you also pay a huge markup on the parts that they buy for much cheaper probably at Menards where they can also claim the healthy rebate. I can see that I am not the only customer who has been angered by their high billing prices and surprising extra fees that they do NOT disclose upfront. Save yourself the trouble and the money and DO NOT hire from this company. Though the plumbers who actually do the work for them may be just fine, they are dishonest and not trustworthy about their billing and customer service is extremely poor. I would rate at zero stars if I could.
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Frequently Asked Questions

What financing does H.A. Thompson & Sons offer for heating and cooling upgrades?

Financing for high-efficiency heating and cooling upgrades is available with approved credit and includes convenient monthly payment options.

Can H.A. Thompson & Sons begin assembling building systems before a project breaks ground?

Its prefabrication process lets building-system assembly begin before a project breaks ground, which can help accelerate the schedule.