Running an HVAC company in San Francisco
San Francisco's cool, foggy summers mean heating has always mattered more than cooling, though warmer spells now bring more cooling and heat pump questions. The city is full of century-old Victorians, Edwardians and multi-unit buildings, where tight access, old drain lines and knob-and-tube surprises are normal. Most of San Francisco falls in California Energy Commission climate zone 3, which matters for energy-code work; check an exact address with the Commission's climate zone search. The utilities are PG&E (with CleanPowerSF as a generation option) for power and PG&E for gas.
In a mild coastal climate, HVAC is more about heating, air quality and heat pump conversions than emergency cooling. Fall and winter bring furnace and no-heat calls, and the occasional hot spell sends a burst of AC questions from homes that never needed it before.
How many HVAC companies work in San Francisco
The Contractors State License Board's License Master file (downloaded November 13, 2026) lists 99 C-20 HVAC licenses in good standing with a mailing address in San Francisco, out of 11,385 statewide (0.87%). That counts license holders, not trucks: some are one-person shops and some dispatch dozens of techs, and companies based in nearby cities work San Francisco too. Either way, a homeowner in San Francisco has a long list to call, and the first shop that answers and books usually gets the job.
Permits and the rules that shape the job
San Francisco is a combined city and county, so the San Francisco Department of Building Inspection (DBI) handles permits across the whole city.
Most HVAC changeouts in California need a permit, and the state's Title 24 energy rules require duct sealing and testing, with third-party HERS verification, on many of them; check the current requirements for climate zone 3 with the permit office. New air-conditioning equipment sold in California must use a refrigerant with a global warming potential under 750 (California Air Resources Board, from January 1, 2025), which is why the newer refrigerants now show up on every replacement quote.
Answering every call
When the line is busy or it is after hours, the SWITCHBOARD AI receptionist answers in your shop's name and books the job while the caller is still on the line. You teach it your answers: which parts of the city you cover, your trip charge, the jobs you do not take. A phone menu can send real emergencies to the on-call tech, and when it does not know something, it takes a name, number and problem for a callback instead of guessing. Every call is transcribed and lands in one inbox with your texts, email and web leads. More in how to stop losing after-hours calls.
Getting around San Francisco
Parking, hills and narrow streets make every stop slower than the miles suggest, so fewer, better-planned stops per tech is the goal. Plan the day rebuilds tomorrow's routes to cut driving, keeping promised arrival windows, skills and pinned visits, and nothing moves until you press Apply. Who's free ranks the nearest tech with the time and skills for an urgent call. See how Plan the day works.
How SWITCHBOARD fits a San Francisco HVAC company
Job Walk builds Good, Better and Best replacement options from your own Price Book with live margin against your target, and maintenance plans renew and book their visits on their own, which fills the slow months. See how to price an HVAC replacement and how to sell maintenance plans.
The whole crew gets a login with no seat fees, and every feature is included. Setup is done with you on a call, and the goal is to be live in about one to two weeks. Pricing is quoted per shop on a 30-minute walkthrough: book one here, or try the sandbox first.
Other trades in San Francisco
- Electrical in San Francisco
- General contractors in San Francisco
- Plumbing in San Francisco
- Roofing in San Francisco
Questions people ask
How many licensed HVAC contractors are in San Francisco?
CSLB's license file (November 13, 2026) lists 99 C-20 HVAC licenses in good standing with a mailing address in San Francisco. Companies based nearby also work in the city.
Is SWITCHBOARD built in California?
Yes. It was built in and with a working plumbing shop in Santa Maria on the Central Coast, the first SWITCHBOARD shop.
Can the AI receptionist stick to my San Francisco service area?
Yes. You teach it your service area, trip charge and the jobs you do not take. When a caller is outside your area or asks something it does not know, it takes their details for a callback.
Can the receptionist handle a heat wave?
It answers every call at once, in your shop's name, so nobody hears a busy signal. A phone menu can send true emergencies to the on-call tech, and routine calls are booked into real slots on your board.
How long does it take to switch?
The goal is about one to two weeks with one or two calls. The import takes exports from ServiceTitan, Housecall Pro, Jobber, QuickBooks or any spreadsheet, with a dry run and Undo. See switching without losing data.
Sources
- CSLB Data Portal: License Master file (status Clear, by mailing address city) (checked November 13, 2026)
- California Energy Commission: building climate zones and the EZ climate zone search (checked November 11, 2026)
- California Energy Commission: Title 24 Building Energy Efficiency Standards (checked November 11, 2026)
- California Air Resources Board: air-conditioning equipment refrigerant limits (checked November 11, 2026)