Expert HVAC Contractor Serving Marin County

Expert heating and cooling solutions for Marin, Sonoma, and San Francisco counties.

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What We Do

HVAC Contractor services in Marin County, CA

From quick repairs to full projects, we help you choose the right hvac contractor services without pressure or guesswork.

Not sure what you need? We will assess your project at no cost.

Call (707) 541-6921
HVAC technician tools and equipment on a workbench, ready for service calls.

Since 2013

Serving locally
Sonoma County

Our Story

Honest HVAC service,
built to last

JM HVAC has been serving homeowners and businesses across Marin County, Sonoma County, and San Francisco County since 2014. What started as a small operation built on honest work and personal accountability has grown steadily, one satisfied customer at a time. We are proud to be a locally rooted business that still operates with the same hands-on care we had on day one.

Our founder, Jeff McCulloch, built JM HVAC on a straightforward idea: do the job right, be honest about what it costs, and show up when people need you. Over the years, that approach has earned the trust of hundreds of homes and businesses throughout the Bay Area and North Bay. Every call we take is a chance to prove that commitment again.

Our Full Story
License #1001595
How We Work

How We Work

From your first call to system startup, we keep the process straightforward and transparent. Here's what to expect when you work with JM HVAC.

Call or Email Us

Contact JM HVAC at (707) 541-6921 or jeffmcculloch@jmhvac.net to describe your heating or cooling issue. We respond quickly and can often schedule same-day or next-day service.

System Assessment

Our technician inspects your HVAC system, identifies the problem, and explains what needs to be done. You'll get a clear estimate before any work begins.

Repair or Installation

We perform the work using quality parts and proven techniques. Whether it's a repair, maintenance, or new system installation, we keep you informed throughout.

System Check & Cleanup

We test your system to confirm it's running properly, answer any questions, and leave your space clean. You're all set for comfort year-round.

We handle all the technical work and cleanup. You approve the estimate and enjoy reliable heating and cooling when we're done.

Where We Work

HVAC Contractor Services Across
Marin County

Based in Rohnert Park — serving every corner of Marin County.

Primary Service Area

Marin County, CA

Marin County spans the North Bay from San Rafael to Sausalito, with a mix of waterfront communities, hillside neighborhoods, and suburban areas. The county's diverse geography—from coastal towns to inland valleys—requires localized service expertise. We serve all of Marin's major population centers and surrounding areas.

Cities & Communities We Serve:

San RafaelNovatoSausalitoMill ValleyFairfieldVallejoPetalumaConcord
Marin County, CA Services

Sonoma County, CA

San Francisco County, CA

Novato, CA

Santa Rosa, CA

Sausalito, CA

Mill Valley, CA

Healdsburg, CA
Client Reviews

What Sonoma County homeowners say.

5.0
3 Google reviews

Worked with us?

Leave a Review

Jeff was professional, on time, and explained everything clearly before starting the work. I finally feel like I found an HVAC tech I can trust.

Karen T. Google review

Our heating went out and JM HVAC got us taken care of quickly. Honest pricing and clean work. We won't call anyone else.

Marcus L. Google review

I've used JM HVAC twice now and the service has been consistent both times. Straightforward, knowledgeable, and easy to work with.

Diana R. Google review

Ready to become our next happy client?

(707) 541-6921
FAQ

Common Questions About HVAC Contractor in Marin County, CA

Answers to the questions homeowners ask most before hiring a contractor. Not seeing yours? Call us. We are straightforward about our process, pricing, and expectations.

We primarily serve Marin County, CA, Sonoma County, CA, San Francisco County, CA, Novato, CA, Santa Rosa, CA, Sausalito, CA, Mill Valley, CA, Healdsburg, CA. If you are outside these areas, call us. We take select projects beyond our standard service radius for the right scope.

We provide installation, repair, and maintenance for furnaces, heat pumps, central air, ductless mini splits, and boiler systems. Emergency repairs are available.

Yes, we serve homeowners and businesses throughout Marin, Sonoma, and San Francisco counties.

Yes, we offer emergency repair service. Call us at (707) 541-6921 for urgent issues.

Contact us right away at (707) 541-6921. We handle emergency furnace repairs for residential and commercial customers.

Still have questions?

Call us directly. Real answers, no scripts.

Call (707) 541-6921
Find Us

Proudly Based in Rohnert Park, CA

Stop by, call, or book online — we're always nearby when you need us.

Hours

  • Monday 5:00 AM - 6:00 PM
  • Tuesday 5:00 AM - 6:00 PM
  • Wednesday 5:00 AM - 6:00 PM
  • Thursday 5:00 AM - 6:00 PM
  • Friday 5:00 AM - 6:00 PM
  • Saturday 7:00 AM - 5:00 PM
  • Sunday 7:00 AM - 5:00 PM
Get Started Today

Schedule Your Free HVAC Inspection

JM HVAC serves Marin County, CA and the surrounding area with professional HVAC Contractor services. Free estimates, clear options, no pressure.

Licensed HVAC Contractor
24/7 Emergency Service
Residential and Commercial Specialist
10+ Years Bay Area Experience
Full System Installation and Repair
Call (707) 541-6921

Mon–Fri 5:00 AM - 6:00 PM · Sat 7:00 AM - 5:00 PM · Responses within 2 hrs

Schedule a Free Inspection