Williams Plumbing & Heating
Company Overview
Our company, Williams Plumbing & Heating, is family-owned. As the top mechanical, electrical, and plumbing contractor in Montana, we set the standard. We specialize in plumbing for residential and commercial properties. Additionally, we offer HVAC services, fabrication, and civil construction.
Business Services
- Bathtub repair
- Drain installation
- Drain repair
- Faucet installation
- Faucet repair
- Garbage disposal repair
- HVAC installation or replacement
- HVAC system repair
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Sewer installation
- Sewer repair
- Shower repair
- Sink installation
- Sink repair
- Sump pump repair
- Toilet installation
- Toilet repair
- Water heater installation
- Water heater repair
- Water pipe installation
- Water pipe repair
Business Location & Hours
Mon: | 8:00 AM - 2:00 PM |
Tue: | 8:00 AM - 2:00 PM |
Wed: | 8:00 AM - 2:00 PM |
Thu: | 8:00 AM - 2:00 PM |
Fri: | 8:00 AM - 2:00 PM |
Sat: | Closed |
Sun: | Closed |
Recommended Customer Reviews

Now that the project is finished, I want to thank Tyler, Jeff and Brian for their professionalism, for being always prompt, polite and, knowledgeable. We purchased our home in June 2022. It had the original heat pump and a water heater that was way past its prime. Brian and Jeff replaced it with a single on-demand system that takes care of the entire house. They were nothing short of amazing. Our realtor had given us three recommendations for plumbers. I am certain the other two are very good, but I am so glad I selected Williams. I highly recommend Williams Plumbing and Heating.

We like the HVAC tech ""Doug H."" from Williams Plumbing in Bozeman. He is skilled and has serviced our furnace previously. However, the bill fromWilliams Plumbing for furnace service today was TRIPPLE what we were charged three years ago!

I'm visiting my mom and wanted to get the furnace serviced while I was in town. Sarah was very understanding and was able to find an appointment that worked with my schedule. Chad was our service technician and was on time, friendly and helpful. Thank you!

If there was a way to leave zero stars, I would have left zero. I have been a longtime customer, and this year, it was like dealing with a completely different company. It took the technician three visits to the site to do a simple hookup of a heater. He ordered the wrong parts and then had to reorder them. A job that should have taken 2 weeks took 7 weeks. I asked for an estimate for the work, never received one, and then got an enormous bill with no explanation to justify it. The supervisor could not have cared less and was unprofessional. Will never use them again. Do not recommend.

I've never had such a prompt plumbing service. The technician Angel was fantastic. Super friendly, super quick, and kept me informed of what was going on and what he was doing to find the problem and then also take care of it. Thank you for the amazing service! 10/10

I called Williams plumbing and Heating for a hot water problem, they came out charged $250 one week later no hot water. They never came back out, they put me on a wait list, three weeks later I got a call asking if I still needed them. Really? Call Egbert Way better and more knowledgeable! Don't waste your$$

Nick and Dakota were outstanding....New hot water heater that required special modifications...Efficient, professional, courteous, and personable...Nice guys who work hard...They're superb...Charles M.

A big shout out to Williams Plumbing. Not only was I in a stressful situation they stayed calm and were able to pull some strings to come out and help my company stay open as we needed service Immediately. Nobody likes to be that person that needs something ASAP. Williams to the rescue. Hands Down 10 starts!! Highly recommend.

Williams Plumbing had installed our heating and plumbing when we built our home. I called them out for yearly maintenance on our geothermal/heating system. We knew the geo was not working properly based propane consumption and heat pump values. Tech, Doug, did maintenance service and indicated that we replace flame sensor, igniter and clean heat exchange in the spring. We did not want to wait since it is winter and we wanted geo system working. While scheduling this service, we signed up for their yearly service contract because it would give us a discount on services plus other extras for $533. The first appt to replace the parts was a no show. The 2nd appt, the tech, Noah, arrives but is unprepared for the work and leaves. I am not a full time resident and pay someone to meet the service contractors. So I paid for 2 visits and still had no work done by Williams. I left multiple messages (for the service manager, Fred and he never called back. It became clear to me that Williams wasn't interested in our business. I called another company, the guy came out and fixed our geo. Their diagnosis was the heat pumps had bad capacitors and replaced them. Our system is running perfectly now. So in addition to no shows, unprepared service calls, Williams had misdiagnosed the problem! I then asked for a refund on the service contract. I was told ""yes' and that Melissa would process the credit. No credit was issued by Williams so I tried to contact Melissa. Again, no returned calls. I have not gone to my credit card company to contest the charge for $533 and would never use or recommend Williams Plumbing and Heating.

I've used them twice and both times I've felt ripped off. First time had them replace a couple of pieces of pipe for a home sale. The rep spent most of the time talking and wasn't there for 45 minutes. Charged me for 2 hours and said their trip there and back counted. There office is less than 15 minutes from my home. Next time new house. My radiant heat system not working properly. Rep said that it was a faulty valve. Replaced it and charged me $700 to replace it. I could have bought the valve for under $50 at the local plumbing supply house. He wasn't here even 2 hours. The part failed next day. Same guy came back and said must not have been that valve. Replaced another valve and charged me more than $300. 3 days later, my mechanical room was flooding. Same rep came out and said my boiler was shot. The valves weren't the problem after all. To his credit, he did help clean up some of the water. Left with boiler in pieces and charged about $400 for his time. Almost $1400 for them to tell me my boiler was shot. They spend a lot of money advertising and pay for it by robbing the customers. Steer a wide path around them.