Marin Mechanical
Company Overview
Marin Mechanical II, Inc. is a plumbing company located in Marin County, specializing in both residential and commercial services. Having spent over 27 years in the plumbing field, our members are well-versed in their craft. Our commitment to quality has established us as a leading contractor for plumbing and hydronic heating in the region. Our services encompass everything from ground-up construction to plumbing, boiler installations, water heater setups, radiant heating, troubleshooting, and renovations.
No project is too large or too small for us. Our growth over the years reflects our deepening understanding of the plumbing industry. We take pride in our ability to deliver quality work and attentive service on every job, big or small. Our skill set has grown to encompass a wide range of services, including plumbing for homes and businesses, drain cleaning, water heater and boiler installations, radiant heating, minor electrical tasks, troubleshooting, and design.
Five partners—Mark, John, Tony, Jeff, and Jarrett—lead Marin Mechanical. In 1993, Mark and John established the business to reflect their dedication to quality and skilled workmanship. The current owners possess extensive qualifications in the mechanical and plumbing fields, thanks to their diverse experience in various specialty trades. Running Marin Mechanical brings the owners joy, as they appreciate the rewards of diligence, tackling daily challenges, and imparting these values to their staff.
Business Services
- Bathtub installation
- Bathtub repair
- Drain installation
- Drain repair
- Faucet installation
- Faucet repair
- Garbage disposal installation
- Garbage disposal repair
- Gas line installation
- Gas line repair
- HVAC installation or replacement
- HVAC system repair
- HVAC system maintenance
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Sewer installation
- Sewer repair
- Shower installation
- Shower repair
- Sink installation
- Sink repair
- Toilet installation
- Toilet repair
- Water heater installation
- Water heater repair
- Water pipe installation
- Water pipe repair
Business Location & Hours
Mon: | 6:00 AM - 2:30 PM |
Tue: | 6:00 AM - 2:30 PM |
Wed: | 6:00 AM - 2:30 PM |
Thu: | 6:00 AM - 2:30 PM |
Fri: | 6:00 AM - 2:30 PM |
Sat: | Closed |
Sun: | Closed |
Recommended Customer Reviews

DID AN AWESOME JOB with high energy issue in Calistoga as the water heater went out for 6 units, all on the same water system.
Marin Mechanical came in and replaced it and saved the day!
THANK YOU for such care and professionalism.
Kelly Sullivan
Calistoga Apartment Building

Spectacular service! Yes, I know, it sounds exaggerated; but, it's truly an accurate description of my experience with Marin Mechanicsl.
We arrived at a property we had not used for several weeks and realized that the radiant heat system was not working. I scanned Yelp to find a suitable company to help with the problem and reached-out to MM. My call was answered by a knowledgable person who asked logical questions to assess my problem. Since it was late afternoon, he told me they could have a tech out early the next day. As promised a received a call next morning alerting me to the techs arrival.
The tech was a polite, respectful young man, who put on booties before entering my home. I lead him to the mechanical room that houses the equipment and he asked several questions, then said he would assess the problem. 15- minutes later he explained what he had discovered, then provided a clear and detailed explanation of the steps needed to correct the problem.
I approved the work and he spent the next hour working diligently to correct the problem. He cleaned-up his work area after completing the repairs, and left.
The system works perfectly and I could not be more pleased.
Spectacular service!

Marin Mechanical did a great job replacing our ancient water heater and radiant heat system in our Alliance '50's home in Terra Linda. Jarrett and crew were punctual, efficient, knowledgeable, courteous and respectful. It was an absolute pleasure dealing with this company.

This company is great! We had them setup all our plumbing for our new house we remodeled and they were always very responsive and fair. We will definitely use them again in the future.

I had a failing situation with a boiler starting and found Brendan D to be extremely responsive and capable. I would absolutely choose Marin Mechanical and Brendan for future work. He came across as a very honest man and true, the type of professional I'm comfortable working with.
You got a problem, call him. I think you'll agree with me.
-Ric F (southern Marin)

Very good service. We had several items to attend to that had been deferred during pandemic. I appreciated that Jason, the technician who did our work, let me know what we needed to complete the job so that I could run out to purchase those items while he completed some of the other tasks. That way we got it all done on one service call.

Brendan got my hydronics system up and running!!!!! We'd been without any heat for all of January (brrrr) because all the other hydronics companies had been too busy, tried to massively overcharge, or flaked. These guys are the only local hydronics shop I trust. I only wish I'd known about them already!

We worked with Brendan at Marin Mechanical. Brendan was great and he saved us!!! He was honest, fair and professional. He walked me and my wife through each step and was always open and transparent about every thing he was doing. He explained the issue and the problem that needed to be solved. He answered all of our questions and always gave us a few alternatives and provide a recommendation.
It is so hard to find honest contractors. Brendan is someone you can trust and we will definitely use him for all of our needs. We reached out to several plumbers and contractors before we found Brendan and sadly was likely cheated. Our problem was rather complicated and others took advantage of that. We so wish we had found Brendan earlier on.
Working with Brendan at Marin Mechanical, you will receive great service and great work at a fair price, and feel assured at the end of the job, the work was done properly. I can't recommend him enough!

These guys did a small job for me and did it well. It was very pricey, however. Then they came out to check something else out and charged way too much for an estimate. It's too bad because the first work was good. They need to relax a bit and realize that giving estimates is not where they are going to make their fortunes.

I can whole heartedly recommend and endorse the work and people at Marin Mechanical. Brandon and his crew as super professional, responsive and genuinely care about providing a great service and quality heating system. I had the misfortune of working with another company that is the polar opposite of Marin Mechanical--I assure you having a competent, qualified, personable and infinitely skilled plumbing crew that know the ins and outs of not only their radiant systems, but have enough knowledge to tease apart the slipshod work of others makes a world of difference. I called Marin in to install a few new loops in our radiant system and move some things around. They discovered that the original installation was flawed, the system not properly sealed so that corrosion was happening and parts were failing, they took them off and showed me the build up. They came out multiple times as these parts failed following the significant rough plumbing, always congenial, always responsive, and tuned the system so that now our house is nice and toasty where as before our bedroom radiant wall units barely could heat the space. If you're considering radiant or you've fallen prey to other less competent companies and are looking for someone to take over and fix their mess, call these guys, you'll be glad you did.