HVAC Services in San Anselmo, CA

San Anselmo sits in Sonoma County's wine country where Pacific marine air keeps summer temperatures mild, with July highs averaging 79 F and only 18 days pushing past 90 F each year. However, inland positioning means occasional heat events climb above 100 F, and the cool, rainy winters with 37 F lows require five to six months of reliable heating. Gas furnaces dominate most homes, though the 2017 Tubbs Fire prompted widespread rebuilding and a surge in air conditioning installations for properties that previously went without. With five hvac companies San Anselmo serving the area and an average rating of 4.8 across more than 900 reviews, homeowners have access to skilled professionals, and two contractors now offer 24/7 emergency response for year-round comfort.

The cost of hvac services in this region spans from $2 for minor repairs to $76,000 for complete system replacements, reflecting the full spectrum from routine maintenance to comprehensive new installations. Every project carries its own price tag based on the specific equipment required, the size of the property, and the complexity of the installation. California law requires hvac contractors to hold a C-20 Warm-Air Heating, Ventilating, and Air-Conditioning Contractor license from the Contractors State License Board, which means homeowners work with professionals who have documented at least four years of HVAC experience within the past decade.

Reviewers consistently highlight two companies that stand out among hvac companies San Anselmo. Ongaro & Sons earns praise for technician communication, with 764 customers awarding the company 4.8 stars and noting how clearly technicians explain each step of the work. Acco Electric maintains a perfect 5.0 rating across three reviews, with clients specifically naming the team members who handled their projects and mentioning panel replacements alongside smart home upgrades. These patterns in feedback reveal that communication and reliable follow-through define the best hvac San Anselmo contractors.