Commercial Services in the North Bay
5 servicesOngaro & Sons supports commercial properties with practical HVAC, plumbing, electrical, indoor air quality, and maintenance services for businesses across Marin, Sonoma, and Napa counties. Whether you manage a small office, retail space, restaurant, or larger commercial facility, our team helps keep essential building systems working reliably. Explore the commercial services below to find the right fit for your property.
Schedule Your Commercial Service
Tell us what your commercial property needs, and our team will help you schedule the right service. We proudly serve Sonoma, Marin, and Napa counties. Call us now at 415-741-2820 or book your appointment online.
Your Comfort, Our Priority
Ongaro & Sons is your trusted heating, cooling, plumbing, electrical, and solar expert, specializing in reliable maintenance and repair services that keep your home running efficiently year-round.
Our certified technicians deliver unmatched expertise with fast, friendly service across Marin, Sonoma and Napa County. From HVAC tune-ups to plumbing repairs and electrical upgrades or solar solutions, we focus on energy-efficient performance and long-term comfort. Count on us to maintain the systems that power your home and keep your environment just the way you like it.
Licensed, Insured, Background-Checked
Our technicians are licensed, experienced, and trained to service all makes and models.
Locally Owned and Operated
Serving the Napa, Marin, and Sonoma communities with personalized, hometown service.
Reliable Repairs
We respond quickly and get the job done right the first time, with no surprises.
Since 1932
Why Ongaro & Sons?
Four generations of trusted home service. Open any reason to see what it means for your home.
Schedule Service →Family-owned in the North Bay since 1932
Four generations of the Ongaro family serving Marin, Sonoma and Napa County. We know these homes and the systems in them.
Licensed, insured, background-checked technicians
Every technician is fully licensed and insured, background-checked, and trained on the equipment we install.
Diamond Certified and BBB A+
Diamond Certified since October 2016, and BBB Accredited with an A+ rating since December 1995.
Mitsubishi Diamond Contractor Elite and Trane Comfort Specialist
Both top manufacturer tiers. That standing decides how registration and extended warranty terms are handled on the system you actually bought.
The price is agreed before work starts
You see the number before the work begins. Flat-rate quotes, no surprises and no pressure.
Comprehensive maintenance program
Members get priority scheduling, discounts, and proactive checkups that prevent costly failures.
Discount
Membership
Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Members get priority scheduling, discounts, and proactive checkups that catch problems early.
Member Discounts
5% off every repair and replacement, all year long.
Peace of Mind
Proactive checkups catch issues before they become big problems.
Courtesy Reminders
We call you to schedule: never miss a seasonal service.
Special Offers
Enjoy our seasonal promotions and save on your next service. Limited-time offers, don’t miss out!
From the Blog
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Ceiling fan direction for summer is counterclockwise: push air down for a wind chill effect, then raise the thermostat 4 degrees. The science.
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May 1, 2026Wildfire Smoke & Indoor Air Quality In Marin & Sonoma
Wildfire smoke contains PM2.5 and toxic gases standard HVAC filters miss. What protects indoor air quality across Marin, Sonoma and Napa County.
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Apr 29, 2026HVAC Permits In Marin And Sonoma County
Unpermitted work creates insurance risk and sale complications in Marin, Sonoma and Napa County. What permits protect and how to verify your contractor.
Read MoreFrequently Asked Questions
What does it mean if my commercial equipment is making strange noises?
These could be indications of underlying issues. Our [home] repair specialists are adept at identifying and fixing minor problems before they escalate into bigger, more expensive ones.
What is the cost of a new commercial system?
The price depends on the unit's size and specific features. For example, a small-to-medium-sized commercial property will differ from a larger commercial building. The capacity of the system and its energy efficiency will also determine the price point. At Ongaro & Sons, we believe in transparent pricing and providing detailed quotes to help you make informed decisions.
What types of businesses do you serve?
We serve a wide range of commercial properties including office buildings, restaurants, retail stores, schools, healthcare facilities, and industrial sites.