Seasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
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AfterHVAC Company in San Anselmo, CA
San Anselmo sits in the Ross Valley’s confirmed inland heat pocket, where summer temperatures routinely climb 10-15°F above coastal Marin, yet most homes were built between 1900 and 1940 with no ductwork and no expectation of cooling. At Coldharbour Heating & Air, we’re the local team that engineers HVAC solutions into these older homes, from ductless mini-splits in Craftsman bungalows to furnace repairs in hillside ranches with original floor furnaces still running. If you need heating or cooling help in San Anselmo, call us at (817) 402-2972. A live person answers 24 hours a day, and we’ll give you a written price before any work begins.
Our main San Anselmo services are linked below. Every repair we perform carries our 365-Day Done Right Promise in writing: if it fails within a full year, we come back and fix it at no charge.
Why San Anselmo Homes Are Different
San Anselmo’s housing stock creates HVAC challenges you won’t find in newer suburbs. The valley floor and lower hills are packed with pre-1940 Craftsman bungalows and Victorian cottages built when the North Pacific Coast Railroad made this a commuter hub. These homes have plaster walls, shallow crawl spaces, and zero original forced-air ductwork. Retrofitting ducts is often prohibitively expensive, so ductless mini-split systems have become the default cooling solution here.
The 1950s and 60s brought ranch homes to steeper hillside lots above Sir Francis Drake Boulevard. Many still run original floor furnaces with cramped duct chases and condenser placement constrained by grade. We’ve worked on homes where the only viable location for outdoor equipment required a custom pad and structural bracing.
San Anselmo Creek bisects the town, and FEMA flood zone designations cover many parcels along the valley floor. On these properties, we regularly mount condensers and air handlers above base flood elevation, adding permitting complexity and installation cost that wouldn’t apply to a job just up the hill in Fairfax or over the ridge in Ross. Winter nights are cool but rarely hard-freezing, so systems must handle an unusually wide seasonal range within a compact geographic footprint.
Our Main San Anselmo Services
San Anselmo homeowners call us most often for these three services. Each has its own dedicated page with detailed local information.
AC Repair in San Anselmo
When a heat event pushes San Anselmo past 100°F while coastal Marin sits in the 60s, a failed compressor or refrigerant leak isn’t uncomfortable, it’s unlivable. Our technicians carry common capacitors, contactors, and refrigerant to address the majority of same-day AC repairs in San Anselmo. We service all major brands including Trane, Lennox, and Goodman, and every repair comes with our written 365-Day Done Right Promise. If your AC is blowing warm air, cycling rapidly, or not running at all, AC Repair in San Anselmo covers what we check, typical costs, and how fast we can get there.
Furnace Repair in San Anselmo
San Anselmo’s older homes run a mix of gas furnaces, original floor furnaces, and early forced-air systems tucked into tight crawl spaces. We’ve replaced failed igniters in hillside ranches on Morning Sun Avenue and tracked down heat exchanger cracks in valley-floor bungalows near Creek Park. Our trucks stock igniters, flame sensors, and blower motors for Rheem, Goodman, and other major brands to complete most furnace repairs in a single visit. For full details on diagnostics, safety checks, and pricing, see Furnace Repair in San Anselmo.
AC Installation in San Anselmo
Most San Anselmo cooling installations are ductless mini-split systems engineered into homes that were never designed for forced air. We assess electrical panel capacity, identify the best wall or ceiling locations for air handlers, and determine outdoor unit placement that respects setback rules and, on flood-zone properties, base flood elevation requirements. Every installation gets a written fixed price, a scheduled install date, and all rebate paperwork handled. Learn more about our process at AC Installation in San Anselmo.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in San Anselmo
Our technicians train on nine major residential HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. We stock common parts for Trane, Lennox, Goodman, and Rheem locally, which means most repairs don’t wait on a warehouse delivery. See our brands for full coverage details.
Pricing for HVAC Company in San Anselmo, CA
| Service | Typical range in San Anselmo |
|---|---|
| AC Repair | $150-$650 |
| Furnace Repair | $150-$700 |
| AC Installation | $3,500-$7,500 |
| Tune-Up | $80-$200 |
What pushes San Anselmo jobs toward the higher end: flood-zone elevation requirements, custom mini-split engineering for homes without ducts, and hillside access challenges that add labor hours. Before any work begins, we hand you a written price that won’t change at the door. That’s The Kingswell Way.
Neighborhoods We Serve in San Anselmo
We dispatch from our San Francisco Bay Area office and typically reach San Anselmo homes within the same service window we quote. These are the neighborhoods we work in most often:
- San Anselmo Avenue corridor (downtown and surrounding residential blocks)
- Yolanda Park and Creek Park areas (valley floor, flood-zone considerations)
- Sequoia Valley and surrounding hillside ranches
- Morningside and upper Sir Francis Drake Boulevard lots
- Brookside and Red Hill neighborhoods
Service Area – Cities Near San Anselmo
Our crews work throughout central Marin County. If you’re just outside San Anselmo’s limits, we also serve Fairfax, CA, Kentfield, CA, San Rafael, CA, and Larkspur, CA. Scheduling and dispatch are coordinated from our San Francisco Bay Area office, with technicians assigned to your area for prompt arrival.
Serving San Anselmo, CA - Our Local Coverage Area
We’re based in the San Anselmo area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About HVAC Company in San Anselmo
We typically offer same-day or next-day service for heating and cooling repairs in San Anselmo, with emergency calls prioritized during heat events or no-heat situations. A live person answers our phones 24/7, so you’ll never reach voicemail when you call (817) 402-2972.
Most AC installations and furnace replacements require a Town of San Anselmo permit, and flood-zone properties may need additional elevation documentation. We handle permit applications as part of our installation service, not as an add-on fee.
Several San Anselmo neighborhoods have active HOAs that review exterior equipment placement. We provide technical drawings and equipment specs for HOA submission, and we design installations to minimize visual impact from street level.
What happens when you call
- 1A real person answersNo phone trees - talk to a local hvac pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What San Anselmo Customers Say
"AC died overnight with a newborn in the house. They bumped us up the list and had it running by noon. I about hugged the guy. Fair price even on a rush call."
- Celeste Ngo"The repair was done well and quickly. Scheduling over the phone was a little clunky and I got transferred twice, but the tech himself was great and on time."
- Brett Haygood"Furnace was short cycling all winter. They diagnosed a bad sensor instead of condemning the whole unit like I feared. Cheap fix, honest call."
- Russ Tiedemann