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Ongaro & Sons service van parked in front of a two-story white house with garage at dusk.

Trusted Home Services Since 1932.

Your trusted source for heating, cooling, plumbing, electrical, and solar services in Marin, Napa, and Sonoma counties.

Why Choose Ongaro and Sons?

Putting your family name on a business is more than just a label, it’s a promise. It reflects a commitment to integrity, quality, and long-term relationships. For us, that commitment means:

  • Knowing your trade.
  • Hiring only the best tradespeople.
  • Making sure your best tradespeople are continually up-to-speed on the latest technologies and practices.
  • Ensuring customer satisfaction with quality service using reliable products backed by guarantees, and providing all of this at reasonable prices.

Value That Lasts

With Ongaro & Sons, you’re investing in quality, integrity, and service that stands the test of time. Explore our current promotions and see the difference real value makes for your HVAC, plumbing, and electrical needs.

Drain Cleaning

Our expert drain cleaning services tackle everything from small clogs to more significant challenges. Trust our team for fast, effective solutions that help prevent future problems.

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Ongaro & Sons white service van with roof-mounted equipment and company branding on the side.
Ernest Ongaro's historic storefront with vintage cars parked outside, mid-20th century black and white photograph.

Career Opportunities

Be a part of an experienced team within an industry in high demand.

Revolutionizing HVAC for Over 100 Years

Trane logo with red circle and horizontal lines next to italicized company name and tagline "It's Hard To Stop A Trane"
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Two Trane air conditioning units: gray outdoor compressor with dual fans on left, black cylindrical condenser unit on right
Service area map showing the North Bay coverage including San Francisco Bay Area, Sacramento, and surrounding regions highlighted in green.

Our Service Area

  • Marin County
  • Napa County
  • Sonoma County

Since 1932

Why Ongaro & Sons for Your Home

Four trades, one family-owned company, and the licences to prove each of them.

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Four trades genuinely in-house

HVAC, plumbing, electrical and solar are all carried out by our own licensed technicians. A heat pump that turns out to need panel work does not become a second contractor and a second wait.

Eleven active licence classifications

Ongaro & Sons holds C-20 heating and air conditioning, C-36 plumbing and C-10 electrical among eleven classifications on an active California contractors licence first issued in 1963.

Both top HVAC manufacturer tiers

Mitsubishi Diamond Contractor Elite and Trane Comfort Specialist are the highest tier each manufacturer awards.

Independently rated, not self-declared

Diamond Certified since October 2016 through American Ratings Corporation's customer satisfaction research, and BBB Accredited with an A+ rating since December 1995.

The same family since 1932

Four generations, headquartered in Petaluma, working across Marin, Sonoma and Napa Counties. The price is agreed before work starts.

You're in good company

4.8

2,726+ reviews on Google

Kerry Atkinsonin the last week

David Weatherly was great! He was very professional, explained everything he was doing and did the job as required. Ongaro is fortunate to have such a good mechanic on board.

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michele obidin the last week

Very reliable plumbing & electrical. I’ve used their services for 40 years! I highly recommend them for your household needs!! Thank you Ongaro & Sons! Michele

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janet benjamin3 weeks ago

A big thank you to Cody and Aldo, who quickly came to our condominium to help diagnose the problem, after a PG&E Power outage created a loud noise in our unit. The swift diagnosis and follow up with a quote was greatly appreciated! This is why we will continue to be clients of Ongaro. Thank you, Janet and Ron Benjamin

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Karin B3 weeks ago

I am always so pleased with Ongaro & Sons. It's a family run business, every tech and manager I have encountered has been so kind, so professional, so friendly, and my dogs always love them! The scheduler always calls me when something opens up before my scheduled appointment. Text communication and post visit write ups are fantastic and full of helpful info. We've used them on three different properties over the last 10-15 years. Our local contractor recommends them and they do great work! We have used them for all manner of things on a modern house, and mid century house and a rental property that was originally built in 1896... HVAC, ductless, ducts, plumbing, furnace, thermostat and recently we bought a new AC from them and it's so quiet, so efficient, and it takes up way less space on our side yard. They are coming next week for our first ever electrical issue and we are feeling very positive about choosing them once again to work on our home.

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Last week I had a team of skilled Ongaro professionals (plumbers, electrician, and HVAC specialist) work on my home. What could have been the worst of times turned into one of my best home owner experiences. Each trades person was an excellent communicator and educated me about the water heater system and installation, the plumbing and electrical issues of my 1946 y/o home and my HVAC maintenance needs. I feel the cost of the work was worth it. I am grateful for the excellent professional skills provided by Michael the estimator, Rene the electrician, Devon from HVAC and all the plumbers Aldo, Felipe, Roberto, Kurt and Jeff. Daniella went the distance providing excellent service coordination. I feel fortunate to have worked with each of you, thank you, for your care and work ethic. I highly recommend Ongaro.

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Dorothy McCombera month ago

Cody their electrician was just amazing!!. He even put in the effort to call us saying he'd finished off earlier than expected from his previous client & was in the neighborhood & could come by earlier if we wanted!! Which was fantastic , not only was he able to figure out our wiring he kept us well informed of what he was doing throughout the process. Very knowledgeable & an excellent communicator!!

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Faris Jafar2 months ago

Had an urgent issue with plumbing and sewer line. Niko arrived first thing in the morning - was professional, efficient, and showed deep attention to detail and care about our situation. Resolved all issues quickly - Fantastic work and gentleman. Thank you so much!

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  • Better Business Bureau A+ Rating logo.
  • Diamond Certified logo.
  • Pacific Sun Best of Marin Hall of Fame logo.
  • SPAN Certified Installer logo.
  • PHCC Educational Foundation logo.
  • Diamond Contractor Elite logo.
  • Trane Comfort Specialist logo.