Delivering exceptional customer service, one home at a time.
Peterson Mechanical Inc. is a Sonoma-based mechanical contractor providing a single source for reliable mechanical systems in the San Francisco Bay Area. With a century of experience, we've learned what it takes to provide complete customer satisfaction. Since 1915, Peterson Mechanical has been the trusted name in the Bay Area, providing HVAC, plumbing, and refrigeration services to a wide variety of market sectors.
Our History
With a rich history dating back to 1915, Peterson Mechanical Inc. has been revolutionizing the mechanical construction industry with innovative design, engineering, and construction solutions. Over the years, our capacity, experience, and use of technology have allowed us to increase the size of our projects throughout the Bay Area and surrounding areas. We have grown from a small mechanical contracting firm to a large-scale mechanical contractor, delivering large commercial projects, high-rise HVAC systems, and large-scale commercial projects.
Why Choose Us
At Peterson Mechanical Inc., we pride ourselves on our commitment to excellence, safety, and customer satisfaction. Our team of experienced engineers, CAD drafting personnel, project managers, estimators, fabricators, and technicians collaborate to deliver the highest-quality mechanical systems, ensuring the utmost satisfaction for our customers. Our robust infrastructure, advanced technology, and expertise have enabled us to deliver seamless project execution, on-time and on-budget.
Services
We offer a diverse range of services, catering to the needs of both residential and commercial clients. Our services include:
Design Services
- In-house licensed civil and mechanical engineers
- Design-build
- Design-assist
- Preconstruction services
- Preconstruction budgeting
- Design coordination
- 3D CAD design
- Constructability review
- Code compliance
- Target value design
- Lean design
- LEED/Green design
Plan Services
- 3D BIM modeling
- CAD mech/drafting
- System coordination/collaboration
- Navis works coordination/BIM meeting hosting
- Big room experienced integrated product delivery
- Experienced construction sequencing planning
- Site logistics planning
- Constructibility review
- Conceptual design estimating or budgeting
- Lean trained and experienced
Build Services
- HVAC plumbing
- Hydronic piping
- Commercial/industrial air conditioning
- Boilers/pumps/chillers/towers
- Clean room/HEPA systems
- Medical gas process piping
- Air conditioning
- Custom sheet metal fabrication
- In-house CMC duct fabrication
- In-house piping prefabrication
- Trimble digital site layout
- Field iPad integrated with Plangrid drawings
Service
At Peterson Mechanical Inc., we deliver highly trained technicians to provide 24/7 HVAC service, ensuring that your mechanical systems are installed, repaired, and maintained efficiently. Our mechanics are experienced and trained to handle complex systems, keeping your systems running smoothly and efficiently.

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