County Service Area

HVAC contractor in Sonoma County, CA

Sonoma County stretches from the Pacific coast at Bodega Bay east through wine country valleys and north to Cloverdale, giving it a wide range of climates under one county line. Coastal communities like Bodega Bay stay cool and foggy most of the year, while inland cities like Healdsburg and Cloverdale see summer highs that push air conditioning systems hard. The housing stock spans five distinct eras, from pre-1940 bungalows in the older cores of Petaluma, Sebastopol, and Santa Rosa to post-fire rebuilds in Fountaingrove and Coffey Park that came with modern duct layouts. That mix means every HVAC job here is different, and knowing which era of home you are working in changes the approach before the first panel is opened.

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Service Location

Sonoma County, CA

CA County Service Area

No extra travel fees for this area

Communities we serve

Santa Rosa Petaluma Healdsburg Sebastopol Rohnert Park Windsor Cloverdale Bodega Bay
  • Serving Santa Rosa, CA since 2009
  • Licensed Contractor
  • Veteran Owned
  • Honest Work, Fair Pricing
Close-up of a ductless mini-split indoor air handler mounted on the wall of a coastal Sonoma County home, with wood-paneled walls visible in the background.

Sonoma County, CA

HVAC Contractor

Custom Comfort heating and cooling in Sonoma County, CA

North Bay Heating and Cooling Built for Sonoma's Five Housing Eras

Santa Rosa's neighborhoods tell the story of Sonoma County's building history. Coffey Park and Fountaingrove have post-2017 rebuilds with modern air handler closets and fresh duct runs. Older corridors like Railroad Square, the West End, and South Park have homes from the 1950s through 1980s where original ductwork is often undersized or deteriorating. We work in both and adjust our approach to match what is actually in the walls.

Coastal communities from Bodega Bay through Guerneville and Monte Rio rarely need heavy air conditioning, but they do need reliable heating systems that can handle damp, salt-air conditions without corroding prematurely. Ductless mini-split systems are a strong fit here because they avoid the moisture problems that can develop inside ducted systems in high-humidity coastal homes. We size and install these systems to match the actual heat load of each property, not a generic square-footage estimate.

Seasonal timing matters in Sonoma County. Summer heat arrives fast in the inland valleys around Healdsburg and Cloverdale, and a system that has not had A/C system maintenance since the previous season may not keep up when temperatures spike. We recommend scheduling maintenance in spring before peak demand, and again in fall before the heating season begins. That schedule keeps equipment running at rated efficiency and catches worn parts before they cause a breakdown.

At a glance

  • Serving Santa Rosa, CA since 2009
  • Free written estimates with no obligation
  • Premium options most contractors don't carry — we explain the differences honestly
  • Responsive scheduling and clear communication from estimate to completion
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Our Services in Sonoma County, CA

Every service, available in Sonoma County, CA

Across Sonoma County, the most common calls we handle are HVAC system repair on aging equipment in older Santa Rosa and Petaluma homes, and ductless heating and A/C services in coastal properties near Bodega Bay and Guerneville where running new ductwork through tight crawl spaces is not practical. We also install and repair thermostats county-wide, which matters in homes that still run older manual controls and are losing efficiency because of it. Heating system maintenance is in high demand before each winter, especially in the unincorporated communities north of Windsor where the county's nine incorporated cities each run their own inspection process.

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Our Work

Recent projects

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Wall-mounted ductless mini-split condenser with fan grille on gray board siding beside a green metal roof Air conditioning contractor
White ceiling-recessed ductless mini-split indoor unit with louvered grille mounted in a soffit beside a recessed downlight Air conditioning contractor
Overhead galvanized and blue-coated ductwork hung from threaded rods with protective wrap on stainless panels HVAC contractor

Serving Sonoma County, CA

Free on-site estimate. No commitment required.

Our crew knows Sonoma County, CA. We will show up on time, assess the job honestly, and give you a clear written number before asking you to decide anything.

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Also serving across the North Bay:

FAQ

HVAC Contractor FAQ for Sonoma County, CA

Common questions from Sonoma County, CA customers about our services, process, and coverage.

Custom Comfort serves the full county, from Santa Rosa and Petaluma in the south to Cloverdale in the north and coastal communities like Bodega Bay and Guerneville to the west. We handle heating system installation, A/C system repair, ductless mini-split installation, and HVAC duct and vent repair across every part of the county. Coastal properties often need ductless systems due to tight access and moisture exposure, and we install and service those as well.

HVAC pricing in Sonoma County varies based on the type of service, the age of your system, and the access conditions in your home. A maintenance visit on a standard forced-air system costs less than a full heating system installation in a pre-1940 home with no existing ductwork. Homes in older Santa Rosa neighborhoods or coastal properties with limited attic access often require more labor to route new duct runs, which affects the total. We give you a clear price before any work begins so there are no surprises.

Custom Comfort provides emergency HVAC repair across Sonoma County, including Santa Rosa and the surrounding communities. If your heating or cooling system fails outside of normal business hours, we respond to get your system back up. We cover the full county, so whether you are in Rohnert Park, Windsor, or out in the unincorporated areas, you are not waiting on a contractor who has to drive in from outside the region.

Yes, Custom Comfort services both residential and commercial HVAC systems across Sonoma County. Commercial buildings often run larger rooftop units or multi-zone systems that require different service procedures than a residential forced-air setup. We handle commercial HVAC system maintenance, repair, and installation for businesses throughout the county.

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Find Us

Proudly Based in Santa Rosa, CA

Stop by, call, or book online — we're always nearby when you need us.

Hours

  • Monday 7:00 AM - 5:00 PM
  • Tuesday 7:00 AM - 5:00 PM
  • Wednesday 7:00 AM - 5:00 PM
  • Thursday 7:00 AM - 5:00 PM
  • Friday 7:00 AM - 5:00 PM

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