Fast, Reliable Emergency & Commercial HVAC Across Larkspur
Emergency HVAC repair in Larkspur typically costs $150–$700 depending on the system and time of call, and our crew can usually reach Baltimore Canyon, Larkspur Landing, and the Magnolia corridor within the same response window we maintain across Marin County. Call (855) 467-1888 for immediate dispatch.
We’ve been driving to Larkspur for 16 years, and by now we know the difference between a no-heat call in a damp Baltimore Canyon cottage and a rooftop unit failure at a commercial building off Magnolia Avenue. Jason Trent, our owner and Field Supervisor, still rides to jobs personally when the situation demands it, whether that’s hand-carrying equipment up a steep hillside path or diagnosing a chiller issue at a Larkspur Landing retail space. Larkspur’s split personality, climate-wise, means there’s no such thing as a standard HVAC call here. The redwood canopy keeps one side of town cool and wet year-round, while bay winds hammer the other with salt air and temperature swings. That local knowledge changes how we size systems, what parts we stock, and how we approach every repair.
Why Stonegate Heating & Air California Is Larkspur’s Preferred Emergency & Commercial HVAC Company
Nearly 500 reviews at 4.7 stars don’t happen by accident. They come from showing up, fixing the problem, and having the owner on-site to make sure it’s done right. Jason Trent has supervised our field operations for 16 years, and that direct accountability is why Larkspur customers call us back.
Our familiarity with Larkspur’s specific challenges matters. We know which 1940s wall furnace models are still serviceable and which have crossed into “parts extinct” territory. We’ve replaced corroded condensers in bay-exposed commercial properties and added dehumidistats to canyon homes where crawl-space moisture was destroying equipment. That experience saves time and money on every call.
Response time to Larkspur matches what we provide throughout our Marin service area. Emergency calls get priority dispatch, and our technicians travel with the inventory to handle most same-day repairs on the nine brands we certify: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard.
Our Emergency & Commercial HVAC Services in Larkspur
24/7 Emergency HVAC
HVAC failures don’t wait for business hours. A dead wall furnace in a Baltimore Canyon home in January is an emergency. So is a rooftop unit down at a Larkspur Landing restaurant on a Saturday night. Our emergency line, (855) 467-1888, connects directly to dispatch, and we carry the parts and tools to repair systems from all nine major brands without waiting for a Monday morning delivery. We’ve responded to midnight no-heat calls in the 94939 ZIP and Sunday afternoon compressor failures in commercial kitchens off Magnolia. The goal is simple: get heat or cooling restored and keep it running.
Commercial HVAC
Larkspur’s commercial base runs from small retail on Magnolia Avenue to larger facilities near Larkspur Landing with rooftop units and split systems. We service and repair commercial equipment across all scales, and our Emergency & Commercial HVAC team handles everything from scheduled maintenance to after-hours emergency calls. Jason Trent personally reviews commercial proposals and often supervises larger installations. We’ve found that Marin County commercial clients value the same thing our residential customers do: a single point of accountability and a technician who knows the equipment, not a rotating cast of subcontractors.
Rooftop Unit Service
Rooftop units near Larkspur Landing face a specific enemy: afternoon bay winds carrying salt air that corrodes condenser coils, damages electrical connections, and shortens equipment life. We inspect and repair RTUs with that local reality in mind, checking for salt buildup, coil degradation, and wind-loosened panels that let moisture into controls. Annual maintenance on these units isn’t optional in this environment, it’s how you avoid a mid-summer failure when every day of downtime costs revenue.
Chiller Service
Commercial chillers in Larkspur serve office buildings, medical facilities, and retail complexes where consistent cooling is non-negotiable. Our technicians diagnose refrigerant issues, compressor problems, and control failures on systems from the major commercial manufacturers. Given the bay-side exposure of many Larkspur commercial properties, we pay particular attention to corrosion on chiller barrels and condenser water loops. A chiller failure in July isn’t a maintenance item, it’s a business emergency, and we respond accordingly.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Larkspur
We certify on nine HVAC brands, and for Larkspur customers that means no dead ends. Whether your system is a Carrier rooftop unit, a Bryant split system, or a Daikin mini-split we just hand-carried up a Baltimore Canyon path, we stock common parts and have factory training to back the repair. That multi-brand fluency matters in a town with Larkspur’s housing diversity, where one home might have a 15-year-old American Standard furnace and the next a new Daikin ductless heat pump. We don’t tell you to call someone else because of the logo on the equipment.
Common Emergency & Commercial HVAC Problems We See in Larkspur Homes
- Legacy wall furnace failures in pre-1940s homes. Original wall furnaces in Baltimore Canyon and the Magnolia corridor often fail from decades of dust accumulation and moisture exposure. Many replacement parts haven’t been manufactured in 30 years, and we assess whether repair is feasible or if it’s time to retrofit a compact ductless system.
- Salt-air corrosion on bay-exposed equipment. Rooftop units and outdoor condensers near Larkspur Landing suffer accelerated coil damage and electrical connection failure from wind-driven marine air. We see this pattern repeatedly and inspect for it proactively during maintenance visits.
- Crawl-space moisture destroying ductwork and equipment. The persistent damp under Baltimore Canyon homes creates condensation on ducts, mold growth, and eventual system shutdowns. We address the moisture source, not just the symptom, often adding ventilation or dehumidification alongside HVAC repair.
- Access constraints limiting replacement options. Narrow lanes and steep paths in hillside neighborhoods rule out standard delivery and installation approaches. We’ve replaced full systems using hand-carried components when a crane truck couldn’t get within a hundred yards of the house.
Pricing for Emergency & Commercial HVAC in Larkspur, CA
Here’s what typical HVAC service costs in the Larkspur market. These ranges reflect our actual billing across Marin County jobs and account for the access challenges and equipment types common here:
| Service | Price Range in Larkspur |
|---|---|
| AC Repair | $150–$650 |
| Furnace Repair | $150–$700 |
| AC Installation | $3,500–$7,500 |
| Tune-Up | $80–$200 |
Emergency calls outside standard hours may carry additional trip charges, which we disclose before dispatch. Commercial and rooftop work is quoted individually based on system size and access requirements. Every repair starts with a diagnostic, and we provide upfront pricing before any work begins. Free estimates are available for replacements and new installations. Call (855) 467-1888 to schedule.
We Also Serve Cities Near Larkspur
Our service radius covers the full Marin corridor. We regularly dispatch to Corte Madera, Kentfield, Mill Valley, and Tamalpais Valley with the same response standards and owner-supervised accountability we bring to Larkspur. Many of our technicians know the local roads and building patterns across these communities from years of repeat calls.
Serving Larkspur, CA — Our Local Coverage Area
We’re based in the Larkspur 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 — Emergency & Commercial HVAC in Larkspur
Sometimes, but increasingly the answer is no. Many wall furnace models from the 1910s through 1940s have been out of production for decades, and we assess each unit individually for parts availability. When repair isn’t practical, we typically recommend retrofitting a compact ductless heat pump, which we’ve installed in numerous Baltimore Canyon and Magnolia corridor homes with no existing ductwork. Call (855) 467-1888 for a free evaluation of your specific unit.
Afternoon bay winds carry salt air that corrodes condenser coils, damages electrical connections, and can loosen panels that let moisture into controls. We inspect for these specific failure modes during maintenance and can recommend protective measures or more corrosion-resistant equipment when replacement is due. Regular service is the best defense against premature failure in this environment. Call for a commercial maintenance quote.
Yes. We’ve responded to emergency calls throughout Baltimore Canyon, including jobs where we hand-carried replacement equipment up steep paths a vehicle couldn’t navigate. Our emergency line, (855) 467-1888, dispatches to all Larkspur neighborhoods without access restrictions, and we stock compact components suited to these constraints.
Replacement makes sense when repair costs exceed 40% of a new system’s price, when parts are unavailable, or when energy bills show the equipment is failing efficiently. In Larkspur’s older homes, we also weigh whether the existing system can handle the specific heating and moisture demands of your microclimate. A 1940s wall furnace in a damp canyon home, for example, often can’t be made adequate regardless of repair. We give honest guidance on both options during our free estimate visit.
Load calculation depends on your specific home’s insulation, square footage, and exposure, but hillside homes in Larkspur’s redwood canopy typically need less cooling capacity than standard sizing charts suggest and more attention to moisture management and ventilation. We’ve sized systems for dozens of these homes and account for the shading, damp crawl spaces, and limited attic clearance that affect performance. A proper Manual J load calculation, which we perform for every installation, prevents the common problem of oversized equipment that short-cycles and fails to dehumidify. Call (855) 467-1888 to schedule a sizing assessment.
Call Stonegate Heating & Air California for Emergency & Commercial HVAC in Larkspur
Whether you’re dealing with a dead wall furnace in a Baltimore Canyon cottage, a corroded rooftop unit at a Larkspur Landing business, or any HVAC problem in between, we’ll give you a straight answer and fix it right. Jason Trent supervises every major job personally, and 16 years of nearly 500 verified reviews back up our work. Free estimates, upfront pricing, and emergency service available. Call (855) 467-1888 now.
Written by Jason Trent, Owner and Field Supervisor at Stonegate Heating & Air California, serving Larkspur and Marin County since 2008.