Peterson Mechanical Inc.

Peterson Mechanical Inc. delivers commercial and residential HVAC solutions from its Sonoma headquarters, serving the San Francisco Bay Area since 1915 and holding California contractors license 171486. Twelve verified reviews award this contractor a perfect 5-star rating, with clients praising their technical precision and respectful on-site conduct. The company operates Monday through Friday from 7 AM to 4 PM, extending mechanical engineering expertise to Oakland, Napa, San Francisco, and surrounding communities across seven Northern California counties.

What distinguishes Peterson Mechanical from regional competitors is their integrated design-build workflow paired with in-house fabrication capabilities. Their team includes licensed civil and mechanical engineers who produce 3D CAD and BIM models, while their sheet-metal shop fabricates custom CMC ductwork and piping assemblies without outsourcing. The firm incorporates digital site layout technology through Trimble systems integrated with Plangrid, and maintains LEED-certified green design expertise for environmentally consciousbuilds. This combination of vertically integrated capabilities and technological coordination allows them to execute high-rise commercial projects under compressed schedules while meeting rigorous mechanical construction standards.

Homeowners who called upon Peterson Mechanical highlight specific technicians who resolved challenging situations. Kyle Jackson earned recognition for documenting project progress with written notes, ensuring clients understood completion timelines while maintaining quiet, efficient work habits. Justin diagnosed an intricate problem with a PG&E-supplied Nest thermostat, refusing to leave until confirming proper operation. These named encounters illustrate why reviewers describe the team as professional, knowledgeable, and thorough.