FairReplace

Gas furnace replacement cost in San Francisco, CA

Installed, 80,000 BTU, 95%+ efficiency

Low$4,600
Typical$5,100
High$6,350

Metro area: San Francisco-Oakland-Fremont, CA. Wages: BLS, May 2025. Permit notes checked October 2026.

A typical furnace (80,000 BTU, 95%+ efficiency) costs about $5,100 installed in the San Francisco area, 5% above the national figure, because HVAC technicians here earn a median $38 an hour against $29 nationally.

Gas furnace (80,000 BTU, 95%+ efficiency), installed

Prices for: San Francisco-Oakland-Fremont, CA

Low$4,600
Typical$5,100
High$6,350

Unit $1,700 (online list price, middle of 9 listings) plus installation about $3,400 for this area. Permit fees and code extras are listed below the table.

How this estimate is built

Prices by size in San Francisco

SizeLowTypicalHighNational typical
60,000 BTU, 80% efficiency$3,800$4,350$5,850$4,100
60,000 BTU, 95%+ efficiency$4,550$5,000$6,200$4,750
80,000 BTU, 80% efficiency$3,900$4,300$5,450$4,050
80,000 BTU, 95%+ efficiency$4,600$5,100$6,350$4,850
100,000 BTU, 80% efficiency$4,050$4,500$5,900$4,250
100,000 BTU, 95%+ efficiency$4,750$5,200$6,450$4,950

Local labor: what HVAC technicians earn here

Hourly wageSan Francisco metroUnited States
25th percentile$30$23
Median$38$29
75th percentile$49$37

The San Francisco market

San Francisco's Department of Building Inspection issues plumbing and mechanical permits. Its 2026 fee table lists Category 1M, a mechanical gas appliance (furnace, hydronic heat or heat pump) in a single residential unit, at $290 per permit with a maximum of two inspections. No city page reviewed names water heaters; a permit is likely, and if a heater is classed as a single plumbing fixture (Category 1P) the fee is also $290, but confirm with DBI. Online applicants must be licensed contractors registered with the city, and only owner-installers of stand-alone single-family homes may apply themselves. Unlisted work is billed hourly. Mild weather keeps cooling loads low in the city itself, while state law still requires seismic strapping on every replacement water heater. Oakland, Fremont and the East Bay suburbs run separate building departments.

Older San Francisco houses commonly have a gas forced-air furnace, and furnaces provide main heat in 62% of California homes, so most quotes here are like-for-like gas swaps. Mild weather means the furnace logs modest hours, so ask what is failing before agreeing to replace it. In a garage install, ask whether the new unit fits the existing space and flue. Ask for a heat pump price too.

Permits in San Francisco

Permit for this jobYes (mechanical permit category for furnace, hydronic heat, heat pump in a single residential unit) (source)
Fee$290 per permit (Category 1M furnace/hydronic/heat pump, single residential unit; max two inspections). Category 1P (single plumbing fixture) also $290 if a water heater is classed there. Unlisted work at $519/hour.
Who can pull itSF-registered licensed contractor, or owner-installer of a stand-alone single-family dwelling
InspectionYes (fee covers up to two inspections; concealed piping inspected before cover)

Rebates in California

HEAR: paused. HOMES: announced, not open yet. Source: California Energy Commission, checked October 13, 2026.

  • TECH Clean California: Statewide heat pump HVAC and heat pump water heater incentives via contractors; also administers HEEHRA (fully reserved)
  • Golden State Rebates: Instant rebates on efficient appliances at retailers

What these programs cover, and other states

Other systems in San Francisco

Gas furnace cost in other metros

Sources