Plumbing Company Sonoma CA | Call Peterson Mechanical
21819 8th St E, Sonoma, CA 95476
Q&A
What should I do if I suspect a slab leak under my Sonoma home?
A suspected slab leak is a serious issue common in our area due to soil conditions and seismic activity. Peterson Mechanical has the specialized equipment and local experience to accurately locate and repair these leaks with minimal disruption. Our team can assess the damage, often using non-invasive methods first, and provide a clear plan for repair or re-piping to protect your home's foundation and prevent water damage. Given our 24/7 emergency service, we recommend calling us immediately for an inspection to prevent further structural issues.
Does Peterson Mechanical handle both residential HVAC and large commercial projects?
Yes, we uniquely serve both. Founded in 1915, we've built our reputation on handling complex mechanical systems for major North Bay institutions like Kaiser Hospitals and Mondavi Winery, utilizing 3D CAD for precise planning. For homeowners in Sonoma, this same expertise and access to advanced technology translates to highly efficient and reliable HVAC installations, repairs, and maintenance for your home. Whether it's a new system for your residence or a retrofit for a commercial building, you benefit from our deep institutional knowledge and family-run commitment to quality.
Can you help with a full plumbing system replacement in an older Sonoma property?
Absolutely. With over a century of service in Sonoma County, we are familiar with the plumbing challenges in historic and older homes. Our services include comprehensive plumbing inspection, installation, and replacement, including water pipe installation. We can manage the entire process, from assessing your existing system and planning the replacement with modern, durable materials to executing the installation with minimal hassle. Our preconstruction and design-assist services ensure the project meets your needs while adhering to current codes and preserving the integrity of your property.
Main Services
- Plumbing installation or replacement
- HVAC installation or replacement
- Plumbing inspection
- Water pipe installation
- HVAC system repair
Company Overview
Founded in 1915 by Ed Peterson, Peterson Mechanical is a third-generation family business deeply rooted in Sonoma. The company is now led by Les Peterson, along with his son Scott and nephew Zach, continuing a legacy of trusted mechanical service. Specializing in HVAC, plumbing, and refrigeration, they serve both residential and commercial clients across the North Bay Area, from hospitals and schools to local wineries. With a century of experience, they combine time-tested craftsmanship with modern tools like 3D CAD and BIM for efficient, reliable project delivery, supported by a 24/7 service team ready to address urgent needs.
Business Location & Hours
| Mon: | 7:30 AM - 4:30 PM |
| Tue: | 7:30 AM - 4:30 PM |
| Wed: | 7:30 AM - 4:30 PM |
| Thu: | 7:30 AM - 4:30 PM |
| Fri: | 7:30 AM - 4:30 PM |
| Sat: | Closed |
| Sun: | Closed |





