About Ongaro & Sons
Whole-Home Energy Partner
Since 1932, Ongaro & Sons has built a reputation for integrity, service, quality, and a commitment to the community we call home, providing North Bay homeowners with comprehensive HVAC, plumbing, electrical, and solar solutions. Family-owned and operated for four generations, we deliver expert service with flat-rate pricing, highly trained technicians, and a 100% satisfaction guarantee.
Built on Tradition and Values
Ongaro & Sons is a family-owned and operated business proudly serving Marin, Napa, and Sonoma counties. Committed to quality and customer satisfaction, we provide a full range of services, including plumbing, heating, cooling, electrical, and solar solutions for both residential and commercial clients.
Our mission is to deliver exceptional service and innovative solutions that enhance the comfort, safety, and efficiency of our customers' homes and businesses. We are committed to building lasting relationships by upholding integrity, professionalism, and a dedication to excellence, all backed by our 100% satisfaction guarantee.
Why Ongaro & Sons
Held to a higher standard: on every job.
Four generations of doing it right: certified people, upfront pricing, and accountability from the first call to the final walkthrough.
Schedule ServiceCertified Technicians
licensed HVAC and plumbing pros: with ongoing training to stay current.
100% Satisfaction Guarantee
Every job we do is backed, start to finish, by our 100% guarantee.
Safety First
Background checks on every technician, all permits pulled, and strict code compliance.
Flat-Rate Pricing
We charge by the job, not the hour, the quote is the price you pay, with no surprises.
Accredited & Award-Winning
A+ BBB, Diamond Certified®, Mitsubishi Elite Diamond Contractor, Trane Comfort Specialist™, C4 license.
5-Star Reputation
Repeat customers and 5-star reviews across Marin, Napa, Sonoma & the North Bay.
Ongaro's Core Values
To be recognized and trusted in our community as a company of Integrity that values the opportunity to be of Service to others. Our dedication to Quality reflects our Commitment to customer satisfaction and to building long-term, trustworthy relationships.
Integrity
For four generations, we've provided fair pricing and straightforward customer service, building trust within our community.
Service
We value the opportunity to serve others, delivering elite-level service that our customers can trust and recommend.
Quality
Specializing in top-tier products and services, we ensure our customers receive exceptional value in every market we serve.
Commitment
Dedicated to performing reliable services, we aspire to build long-term, trustworthy relationships.
Our History
Ongaro & Sons was founded in 1932 by Ernest V. Ongaro to provide reliable service that homeowners can trust. What began as a small family business has grown into a fourth-generation company serving Marin, Sonoma, and Napa counties. Over the decades, we've expanded our expertise to include HVAC, plumbing, electrical, and solar, offering a seamless, whole-home service experience.
Family-owned and operated since 1932, our values have never changed: integrity, service, quality, and a commitment to the community we call home. We offer flat-rate, upfront pricing with no hidden fees, nationally recognized certifications, and warranties that go beyond industry standards, so you get quality work and the peace of mind that comes from a company built on nearly a century of trust.
All work is performed under active California contractors license #215233.
Work With a Team You Can Trust
Schedule service with Marin, Sonoma, and Napa County's trusted, fourth-generation home-services team. Upfront pricing, certified technicians, and a 100% satisfaction guarantee.