Install AC in Sonoma County, CA

Yes, a mechanical permit is required for new AC installations and full system replacements in Sonoma County. Whether your home is in unincorporated Sonoma County or within Santa Rosa city limits, the permitting process differs slightly by jurisdiction, so it matters which authority covers your address.

Yes, a heat pump is a strong option for many Sonoma County homes because it handles both cooling and heating from one system. Sonoma County's climate, with hot dry summers and mild winters, suits heat pump performance well.

System size comes from a Manual J load calculation, not a rule-of-thumb based on square footage alone. The calculation accounts for your home's insulation, window placement, ceiling height, and your specific location within Sonoma County's varied microclimates.

We install central air conditioning systems, ductless mini-splits, and heat pumps for homes across Sonoma County and the surrounding North Bay counties. The right system depends on your home's layout, existing ductwork, and how you want to use it year-round.

Older ductwork is one of the most common issues we find in Sonoma County homes, and it directly affects how well a new system performs. We check duct condition, sizing, and routing as part of the installation process so cooling actually reaches every room.

Yes, Custom Comfort Heating and Cooling serves homeowners across Marin County, Napa County, Lake County, and Mendocino County in addition to Sonoma County. Contact us to schedule an assessment for your home.