It honestly is an honor to give a 5 star review for the service I received from Ongaro and Sons. A plumbing emergency occurred on a Saturday and, if not for the very professional and kind dispatcher immediately contacting the technician, we would have had to go to a hotel. Plumbing back ups are awful! Our technician, Salvador , saved the day. Professional, polite, very versed in the situation and how it could be solved. Salvador was honest that the “ fix” might need a second visit as previous owners had covered the main clean out line and to access it would require specialized tools( camera etc) and an additional assistant. We did need that visit. Digging, chain saw to cut through roots etc. Every step of the way, Salvador explained the process and gave options. I never had to question his recommendations as he provided videos and photos of all work. Salvador’s assistant that day was kind, polite and did an exceptional job especially on a hot day. Standing ovation for them both!
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Trusted Home Services Since 1932.
Your trusted source for heating, cooling, plumbing, electrical, and solar services in Marin, Napa, and Sonoma counties.
Every service. One team.
Heating, cooling, plumbing, electrical and solar for Marin, Sonoma and Napa since 1932.
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.
Career Opportunities
Be a part of an experienced team within an industry in high demand.
Stay in the Know
Sep 17, 2026How Many Amps Does My House Need? Sizing Service for What You Actually Run
How many amps your house needs comes from a load calculation of what you run and plan to add. What drives the number, when existing service is enough, and more.
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Sep 10, 2026Hard Water in Marin County: What Is Actually in Your Water and What It Does
Hard water in Marin County varies by provider and source. The 2025 report figures for Marin Water and NMWD, what hardness does and does not mean, and options.
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Sep 3, 2026Electrical Permit Requirements in California: What Needs One and What Does Not
Find out which electrical projects commonly need permits, how to confirm local exemptions, and what to ask before work begins in Marin, Sonoma or Napa County.
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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.
Schedule Service →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
2,770+ reviews on Google
Ongaro & Sons place safety above everything. My husband and I could not be more happy with the service and repair made to our electrical sub-panel in our home. We greatly appreciate the care the technicians took to make sure our house was safe. We highly recommend Ongaro & Sons for your home electrical work.
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Carlos Mendoza from Ongaro and Sons did absolutely impeccable job replacing electric panel at my house. He is skilled, knowledgeable and very professional electrician- also very personable- it was a pleasure to meet him and have him relocate the panel. I highly recommend this company and Carlos Mendoza in particular.
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Zero complaints, technician was great, price was reasonable.
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We had a water leak in the concrete foundation in our kitchen. Our Ongaro team, Able and Felipe, were super efficient with solving our problem. What could have been a very difficult job turned out to be easy because of their super skills. We highly recommend Ongaro.
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Thank you Cody Cox for great service for my 89 year old father!
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John Lester came to my house very early in the morning. He was business-like and knowledgeable about HVAC systems. But he was also very personable and explained the entire procedure to me. I would highly recommend Ongaro and Sons. His helper Daniel was very good also.
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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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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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