How much does a furnace replacement cost in San Francisco?

A furnace replacement in San Francisco typically costs $3,241-$9,724, 30% above the $4,500 national average.

What is the cost per sq ft of home for a furnace replacement in San Francisco?

Furnace Replacement in San Francisco typically costs $2-$6 per sq ft of home.

How long does a furnace replacement take?

A furnace replacement typically takes 1 day. The minimum timeline is 4-6 hours, and complex projects can run 2-3 days.

Can I DIY a furnace replacement?

DIY feasibility for a furnace replacement is rated Not recommended - furnace replacement involves gas lines, electrical wiring, and combustion venting that require licensed professionals in most jurisdictions.

Cost to Furnace Replacement in San Francisco, CA (2026)

If you’re budgeting a furnace replacement in San Francisco, most projects run $3,241-$9,724, 30% above the $4,500 national average. What moves that number most is usually one thing: Furnace Efficiency (AFUE Rating). On its own it can swing the cost by $800 - $3,000, so that’s the decision to slow down on before you sweat the smaller stuff.

Easiest place to save: Get quotes in spring or early fall when HVAC companies are less busy - many offer 10-20% off-season discounts

In the West Coast (where San Francisco sits): California and Washington pushing heat pump mandates; gas furnace installs face additional regulatory costs.

$3,241-$9,724 in San Francisco

30% above the national average · 1.30x cost multiplier

Expect to pay $3,241-$9,724 for a furnace replacement in San Francisco, about 30% above the national benchmark. The West Coast region's contractor market and material costs account for most of this difference. The detailed breakdown below shows how budget, mid-range, and premium projects compare at San Francisco prices.

Cost Breakdown in San Francisco

Line Item	Low	Mid	High
Cost per sq ft of home	$2	$4	$6
Materials	$1,785	$2,805	$5,100
Labor	$1,603	$2,272	$3,073
Permits	$255	$383	$510
Total	$3,643+30% vs. national avg	$5,843+30% vs. national avg	$9,703+29% vs. national avg

Budget

80% AFUE single-stage gas furnace, basic brand (Goodman or Amana), direct replacement with existing ductwork and venting

Mid-Range

90-95% AFUE two-stage gas furnace, mid-tier brand (Rheem, Trane, or Carrier), standard installation with smart thermostat

Premium

97-98% AFUE modulating variable-speed gas furnace, premium brand (Lennox or American Standard), with zoning controls and whole-house humidifier

Material Options

Material prices below are national averages; availability in San Francisco may shift costs slightly.

Material	Cost/Unit	Pros	Cons	Best For
Single-Stage Gas Furnace (80% AFUE)	$2,000 - $3,500 installed	Lowest upfront cost, simple and reliable, fewer parts to fail	Highest operating costs, louder operation, less even heating	Mild climates, budget-focused homeowners, homes with high ceilings or poor insulation where efficiency gains are minimalLowest upfront cost, simple and reliable, fewer parts to fail
Two-Stage Gas Furnace (90-96% AFUE)	$3,500 - $5,500 installed	Good balance of cost and efficiency, quieter on low stage, more even temperatures	Higher upfront cost, requires PVC venting	Most homeowners in cold climates, the sweet spot of cost vs. performanceGood balance of cost and efficiency, quieter on low stage, more even temperatures
Modulating Gas Furnace (97-98% AFUE)	$5,500 - $8,500 installed	Lowest operating costs, whisper-quiet, ultra-even heating, best humidity control	Highest upfront cost, more complex repairs, longer payback period	Cold climates with high heating bills, homeowners planning to stay 10+ yearsLowest operating costs, whisper-quiet, ultra-even heating, best humidity control
Oil Furnace (83-87% AFUE)	$3,000 - $6,000 installed	Produces very hot air, works in areas without natural gas	Higher fuel costs, requires oil storage tank, more maintenance	Rural areas without natural gas service, Northeast homes with existing oil infrastructureProduces very hot air, works in areas without natural gas
Electric Furnace	$1,500 - $3,500 installed	Lowest upfront cost, no combustion or venting, 100% efficient at point of use	Very high operating costs in most areas, slow to heat	Mild climates with low heating needs, areas with very cheap electricity, supplemental heatingLowest upfront cost, no combustion or venting, 100% efficient at point of use

Other Projects in San Francisco

Full Kitchen Remodel

Full Bathroom Remodel

Hardwood Floor Installation

Back to national average for Furnace Replacement

San Francisco Estimate

Typical Range

$3,241-$9,724

vs. National Average

30% above national

Cost Multiplier

1.30x

Cost Per sq ft of home

$2-$6

This 1.30x estimate prices San Francisco labor from BLS Occupational Employment and Wage Statistics (May 2025) and applies a lighter regional adjustment to materials and permits, which vary less by metro than labor does. Actual bids vary by contractor, project scope, and timing.

See national average costs →