Trusted Plumbing & Mechanical Specialists In San Rafael, CA

For over 27 years, Marin Mechanical II has set the standard for mechanical and plumbing services in San Rafael, Marin County, and across the North Bay. Whether you need radiant heating repair, certified backflow testing, or high-efficiency upgrades, our owner-led team ensures clear answers, accurate solutions, and a commitment to protecting your home or business. Restrictions apply to free estimates.

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A Marin County Staple

Honesty, Integrity, and Quality Craftsmanship Since 1993

Marin Mechanical II is more than a contractor we are your long-term partner in building, maintaining, and protecting the mechanical systems that power your home or business. With a unique focus on hydronic heating, radiant systems, backflow prevention, and green building practices, our team brings a legacy of technical excellence and regional expertise to every project. As a family-led, owner-operated company, we prioritize ethical transparency and direct communication, ensuring you never deal with high-pressure sales tactics or impersonal service. From Eichler radiant heat repairs in Terra Linda to commercial upgrades in San Francisco and Sonoma, our mission is to deliver solutions that stand the test of time.


Serving Marin, Sonoma, Napa, and the Bay Area with pride and precision.

Your Local Experts

Specialized Solutions for Homes, Businesses, and Infrastructure

Navigating California’s evolving mechanical and plumbing codes requires more than a standard plumber. Marin Mechanical II’s state-certified technicians blend deep trade knowledge with a personal, owner-driven approach. We serve a diverse clientele from Eichler homeowners in San Rafael to municipalities and medical facilities throughout Marin, Sonoma, Napa, San Francisco, Alameda, and Contra Costa counties. Our licensed team is trusted for complex hydronic and radiant heating, annual backflow testing, water and gas line upgrades, and sustainable green building projects. When you choose us, you get more than a fix you get a partner committed to long-term reliability, energy efficiency, and the highest standards of craftsmanship.

What Sets Us Apart

Technical Authority and Community Trust

Marin Mechanical II delivers the expertise and accountability you expect from a true local partner.

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Owner-Operated Service

You always communicate directly with Tony, Jeff, or Jarrett. No call centers, no sales scripts. Our leadership is involved in every project.

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Certified Hydronic & Radiant Heating

From under-slab tubing to allergy-friendly radiant systems, our state-certified team specializes in the systems that power Marin’s unique homes.

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Backflow Prevention Experts

We are certified by the State of California for annual backflow testing and compliance, ensuring your water is protected and meeting local regulatory requirements.

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Commercial & Municipal Solutions

Trusted for complex infrastructure, including school districts, medical facilities, and large-scale upgrades across the Bay Area.

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Green Building Leadership

We design and install solar thermal, grey water, and high-efficiency systems for clients who value sustainability and lower utility bills.

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Transparent, Ethical Approach

Our business is built on honesty and integrity. You’ll never face hidden fees or high-pressure tactics, just expert solutions and clear answers.

WHAT WE OFFER

Specialized Mechanical & Plumbing Solutions

Serving Marin County, Sonoma, Napa, and the Bay Area with advanced technical expertise.

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Water Heaters & Boilers

 Replace aging water heaters and boiler systems with efficient solutions that improve reliability, comfort, and long-term performance.

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Water & Gas Piping

From leak repairs to complete repiping projects, we install and upgrade water and gas lines for homes and businesses.

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 Backflow Prevention

 State-certified testing, repairs, and installations that help protect your water supply and maintain compliance requirements.

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Fixture Installation

Upgrade kitchens, bathrooms, and utility spaces with professional fixture replacements designed for lasting performance.

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Hydronic Heating

Specialized radiant and hydronic heating services that deliver consistent comfort, energy efficiency, and quiet operation.

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Commercial Services

Mechanical and plumbing solutions for contractors, municipalities, schools, medical facilities, and commercial properties.

Client Stories

What Our North Bay Clients Say

Our reputation is built on results. Homeowners, contractors, and business owners from Marin to Sonoma and San Francisco trust us for technical excellence, clear communication, and reliable solutions. Clients cite our honesty, responsiveness, and the peace of mind that comes from working directly with the owners. Whether it’s a complex radiant heat repair or annual backflow compliance, our team delivers on every promise.

FAQS

Your Questions About Mechanical & Plumbing Services

  • What types of plumbing and mechanical services do you provide?

     We provide water heater and boiler replacement, water and gas piping, backflow prevention, fixture installation, hydronic heating, radiant heating, and commercial mechanical services for a wide range of properties.

  • Do you work with both residential and commercial clients?

    Yes. Our team serves homeowners, contractors, property managers, municipalities, school districts, medical facilities, and businesses throughout the North Bay and surrounding areas

  • Are you certified to perform backflow testing and repairs?

    Yes. We are state-certified to test, certify, repair, and install backflow prevention devices, helping property owners maintain compliance and protect their water systems.

  • Can you help with hydronic and radiant heating systems?

     Absolutely. We specialize in hydronic and radiant heating systems, including repairs, maintenance, upgrades, and installations for homes and commercial properties.

  • What makes Marin Mechanical II different from other contractors?

    Our clients benefit from over 27 years of experience, specialized mechanical expertise, owner-led communication, and a commitment to honesty, integrity, and quality craftsmanship on every project.

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