HVAC Replacement Cost in San Francisco, CA (2026)
Updated October 2026 · San Francisco, CA · index 1.30
How much does a new HVAC system cost in San Francisco? For a 3-ton system with central AC + gas furnace, homeowners in San Francisco, CA pay about $13,600 on average, and most quotes land between $9,250 and $17,900 — $3,090 to $5,955 per ton. The price covers removing the old system, the new outdoor and indoor equipment, a new line set, electrical and condensate connections, the thermostat, the permit, start-up and commissioning.
The HVAC replacement price in San Francisco runs 30% above the U.S. average: construction labor in the San Francisco area runs 48% above the national mean, materials 3% above. The same job averages $10,500 nationally and about $11,800 at the California statewide index.
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HVAC replacement price in San Francisco by system type
What a 3-ton system costs in San Francisco with each system type, installed:
| Option | Average · range |
|---|---|
| Central AC + gas furnacesplit AC, matched coil and an 80,000 BTU furnace$4,523 per ton | $13,600$9,250 – $17,900 |
| Heat pump + air handlerall-electric split heat pump, no furnace$4,193 per ton | $12,600$8,450 – $16,700 |
| Cold-climate heat pump + air handlervariable-speed heat pump rated for deep winter$4,794 per ton | $14,400$9,700 – $19,000 |
The least expensive option in San Francisco is heat pump + air handler, at about $12,600; cold-climate heat pump + air handler averages $14,400, 1.1 times as much.
Cost to replace an HVAC system in San Francisco by size
With central AC + gas furnace, priced for San Francisco, CA:
| Size | Average · range |
|---|---|
| A 2-ton system$5,882 per ton | $11,800$8,050 – $15,500 |
| A 3-ton system$4,523 per ton | $13,600$9,250 – $17,900 |
| A 4-ton system$3,843 per ton | $15,400$10,500 – $20,200 |
Some costs stay the same whatever the size — load calculation and equipment sizing, mechanical permit and inspection, old system removed, refrigerant recovered — so a bigger job costs less per unit: $3,843 per ton for a 4-ton system against $5,882 for a 2-ton system.
What an HVAC replacement in San Francisco includes
Line by line, the $13,600 average for a 3-ton system breaks down like this: 33% labor, 65% materials and equipment, and $280 in permit fees passed through at cost.
| Line | Low – high |
|---|---|
| Load calculation and equipment sizing | $100 – $300 |
| Mechanical permit and inspection | $150 – $400 |
| Old system removed, refrigerant recovered | $450 – $790 |
| Gas furnace (about 80,000 BTU) | $2,000 – $3,550 |
| Outdoor unit, set on a new pad | $2,950 – $5,550 |
| Matched indoor coil | $1,300 – $2,750 |
| New refrigerant line set (25 ft) | $490 – $790 |
| Disconnect, whip and thermostat wire | $270 – $450 |
| Condensate drain and safety switch | $150 – $350 |
| Gas connection and furnace venting | $420 – $770 |
| Plenums and transitions to the ducts | $350 – $790 |
| Programmable or smart thermostat | $300 – $540 |
| Evacuation and refrigerant charge | $150 – $300 |
| Start-up and commissioning | $150 – $350 |
| Warranty registration and walk-through | $70 – $170 |
Each line is the price book's U.S. rate for that step, scaled by 0.76 to the installed price published sources give for the whole job (see how these prices are built), times San Francisco's index of 1.30; permit fees are not scaled.
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What affects HVAC replacement prices in San Francisco
Labor and materials in San Francisco
Construction wages in the San Francisco metro run 39% above the U.S. mean (BLS, May 2025), and specialty-contractor pay in the city's county moves that up by 6%, to 48% above the national mean. Materials in the area's ZIP codes price 3% above the national average. Together they give San Francisco a construction cost index of 1.30.
Where San Francisco sits in California
San Francisco is the most expensive of the 22 California cities in our index, against a statewide index of 1.13. Riverside is the least expensive at 1.05.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, San Francisco ranks 1st from the most expensive. The job that averages $13,600 here averages $10,500 at the national rate.
Climate a system is sized for in California
Contractors size equipment for the local design temperatures. Across California's counties the median is about 100°F on a hot summer day and 24°F on a cold winter night (ENERGY STAR county table), and your county can differ. A standard heat pump handles most winters here; a furnace or a cold-climate model covers the coldest nights.
Sales tax in California
California's base state sales tax is 7.25%, and cities and counties can add their own. How it applies to a home-improvement contract varies, so ask whether a quote includes it. Prices on this page are before tax.
What a San Francisco contractor will ask before quoting
- Job type — new construction, replacement or upgrade — and the evidence for it
- Heating and cooling load for this house (not the old nameplate), tonnage, fuel and refrigerant
- Ducts, line set, circuit, gas line and flue: keep, fix or replace, each with its reason
- Water heater in scope, and whether it shared the old flue
- Panel main amps, free slots and the new equipment's MCA
- Permits, tests and incentives that apply in this state
HVAC replacement cost in other California cities
A 3-ton system with central AC + gas furnace averages $13,600 in San Francisco; $11,600 in San Diego, $13,200 in Oakland, $11,400 in San Bernardino.
| City | Average · range |
|---|---|
| San Diego, CA15% less | $11,600$7,950 – $15,300 |
| Oakland, CA3% less | $13,200$9,000 – $17,300 |
| San Bernardino, CA16% less | $11,400$7,800 – $15,000 |
| Walnut Creek, CA8% less | $12,500$8,550 – $16,500 |
| Riverside, CA19% less | $11,000$7,500 – $14,500 |
| San Mateo, CA5% less | $12,900$8,800 – $16,900 |
| Irvine, CA12% less | $11,900$8,150 – $15,700 |
| Palo Alto, CA1% less | $13,500$9,200 – $17,700 |
HVAC replacement price in San Francisco: questions
How much does a new HVAC system cost in San Francisco, CA?
About $13,600 for a 3-ton system with central AC + gas furnace, and most San Francisco quotes fall between $9,250 and $17,900. That is 30% above the U.S. average, where the same job averages $10,500.
What is the HVAC price per ton in San Francisco?
$3,090 to $5,955 per ton, about $4,523 on average with central AC + gas furnace. Smaller jobs cost more per unit, because the fixed costs are spread over less.
How much is a 4-ton system in San Francisco?
$10,500 to $20,200, about $15,400 on average, with central AC + gas furnace — $3,843 per ton.
Do you need a permit for HVAC replacement in San Francisco?
Yes — installing HVAC or fuel-burning equipment needs a permit nearly everywhere, San Francisco included. The prices on this page carry $150–$400 for the permit and inspection.
Does the price include sales tax in California?
No. The prices here are before tax; California's base state rate is 7.25%, plus any local rate.
What size HVAC system does a house in San Francisco need?
It is worked out with a Manual J load calculation for the house — included in the prices above — not from square footage alone. Here it is run against design temperatures of about 100°F in summer and 24°F in winter (the California median).
Other home projects in San Francisco
HVAC replacement cost in California
- HVAC replacement cost in San Diego, CA
- HVAC replacement cost in Oakland, CA
- HVAC replacement cost in San Bernardino, CA
- HVAC replacement cost in Walnut Creek, CA
- HVAC replacement cost in Riverside, CA
- HVAC replacement cost in San Mateo, CA
- HVAC replacement cost in Irvine, CA
- HVAC replacement cost in Palo Alto, CA
How these prices are built
Every price on this page comes from JobFlex's contractor price book: what a homeowner pays a licensed contractor for each step of the job, as a U.S. national average per unit, with the contractor's overhead and profit included and sales tax left out. The HVAC replacement is priced step by step, then multiplied by San Francisco's construction cost index of 1.30.
Where the price book's steps for an option add up to more than 20% over the installed price a published source gives for the whole job, every step but a permit fee is scaled down to the middle of that range: central AC + gas furnace × 0.76 (HomeCostCalcs 2026: $7,000–$14,000); heat pump + air handler × 0.76, following central AC + gas furnace; cold-climate heat pump + air handler × 0.76, following central AC + gas furnace.
The index weighs local construction wages (BLS Occupational Employment and Wage Statistics, May 2025) at 60% and the area's material prices (Craftsman ZIP-area factors) at 40%. Published indices for San Francisco, each on its own base: RSMeans residential 1.26, HUD 1.33, Craftsman 1.26. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in San Francisco build quotes like these with JobFlex's HVAC estimator.
- HomeCostCalcs 2026: furnace + AC replacement $7,000-$14,000 standard, $10,000-$20,000 high efficiency
- Today's Homeowner 2025: complete HVAC system install $5,000-$12,500