HVAC replacement cost in San Francisco, CA

Average $7,500; common $5,000 to $12,500; up to $22,000 with new ductwork.

A typical HVAC replacement in San Francisco, CA is about $8,668, including a permit fee of $290.

What we assumed

We price HVAC replacement in San Francisco, CA at 3-ton (36,000 BTU) like-for-like split system.

When a published schedule is a valuation formula, the documented assumed valuation is $7,500 typical ($5,000 low, $16,000 high); not a city-assessed value. 2026 average $7,500; high toward new-duct jobs.

The official typical permit fee is $290. Full detail is in the calculation note on this page.

Questions about this estimate

How much does HVAC replacement cost in San Francisco, CA?

Typical all-in is about $8,668. The official DBI permit fee of $290 is included in the all-in.

Is a permit required for HVAC replacement in San Francisco, CA?

Yes. San Francisco Department of Building Inspection (DBI) requires a permit for a typical HVAC replacement in San Francisco, CA. The typical listed fee is $290. Category 1M is a single residential unit mechanical gas appliance (furnace, hydronic heat, heat pump).

What is included in this HVAC replacement estimate for San Francisco, CA?

The estimate is labor adjusted for local wages in San Francisco, CA, plus materials at the national figure, at the typical size in the table above. The official typical permit fee of $290 is included in the all-in typical.

Why might the San Francisco permit fee differ from this typical figure?

The official San Francisco, CA fee comes from SF DBI Table 1A-C Plumbing/Mechanical, effective July 12, 2026 (flat). SF DBI Table 1A-C Plumbing/Mechanical, effective July 12, 2026 (source retrieved 2026-09-01). Site conditions, extras not in the typical row, and schedule updates can change what you actually pay. Verify with San Francisco Department of Building Inspection (DBI).

How is the typical permit fee calculated for HVAC replacement in San Francisco, CA?

The official typical permit fee is $290. Full detail is in the calculation note on this page.

What project value is this HVAC replacement permit fee based on in San Francisco, CA?

Listed typical project value $7,500.

Are electrical, plumbing, or other trade permits included in this HVAC replacement typical for San Francisco, CA?

Table 1A-C Category 1M mechanical gas appliance: Furnace, hydronic heat, or heat pump. Included.

How much does a 3-ton HVAC replacement cost in San Francisco?

The documented typical job is a 3-ton (36,000 BTU) like-for-like split system. This cost model prices that job as one system. It does not price tons as a separate rate. The cost-by-size rows are 1 system, 2 systems, and 3 systems. The calculator scales the installed job by the system count divided by 1, and 1 is inside the allowed range of 1 to 4, so these figures are that same scale. At 1 system in San Francisco, CA the all-in is $5,875 low, $8,668 typical, and $24,864 high. Those all-in figures add the model's rounded permit for the bands on this row. The official fees are $290, $290, and $290. The model rounds each to the nearest dollar before adding it, so the all-in uses $290 on the low, $290 on the typical, and $290 on the high. The permit is the official Table 1A-C Category 1M flat fee for a single residential unit mechanical gas appliance. It is not rescaled when the system count changes, and it is not a new fee for one system. The other table rows are 2 systems at $17,045 typical and 3 systems at $25,423 typical. Assumed valuation is unused on this row. Job cost is adjusted for local wages using the BLS construction-and-extraction mean of $43.66 per hour for the San Francisco-Oakland-Fremont, CA metro (May 2025), labor wage multiplier 1.390, applied to the official 30% labor share. The permit line is not adjusted for local wages.

How much does HVAC replacement cost per system in San Francisco?

Cost per system on this page is the all-in typical divided by the system count on that row. One system is a complete heating-and-cooling change-out, not a single ton of capacity. The cost-by-size rows are 1 system, 2 systems, and 3 systems. The official typical permit fee is $290. The cost-by-size table shows that fee on each of those rows, because this permit is a flat Category 1M fee and is not rescaled when the system count changes. At 1 system in San Francisco, CA the all-in typical is $8,668, which is $8,668 per system after rounding to the nearest dollar. At 2 systems the all-in typical is $17,045, or $8,523 per system. At 3 systems the all-in typical is $25,423, or $8,474 per system. Those per-system figures are that division of the row. They are not a separate published rate.

Is $15,000 too much for HVAC replacement in San Francisco?

At the model's typical 1 system in San Francisco, CA, the all-in is $5,875 low, $8,668 typical, and $24,864 high. $15,000 is above that typical of $8,668. Published national HVAC replacement prices average $7,500, commonly run $5,000 to $12,500, and reach up to $22,000 with new ductwork. $15,000 is above that $12,500 common high and below that $22,000 new-duct figure. Wage-indexed, the high at 1 system in San Francisco, CA is $24,864. $15,000 is below that adjusted for local wages high and above the typical. On the typical path the same scale first reaches $15,000 at 2 systems ($17,045 typical), which is above the one-system job this page uses as typical. The official permit on this row is $290 Category 1M. Assumed valuation is unused on this flat path. The all-in figures add the model's rounded typical permit of $290. They do not look up a new Category 1M fee at $15,000, and they do not add Table 1A-E electrical.

Do I need a permit to replace an air conditioner or furnace in San Francisco?

On the official path, yes. San Francisco Department of Building Inspection (DBI) is listed as requiring a permit for a typical HVAC replacement in San Francisco, CA, and the official typical fee is $290. The cited source is SF DBI Table 1A-C Plumbing/Mechanical, effective July 12, 2026, retrieved 2026-09-01. Table 1A-C Category 1M mechanical gas appliance is $290 and is included for a single residential unit appliance (furnace, hydronic heat, or heat pump). Typical 3-ton heat pump or 80 kBTU furnace uses that line. Low, typical, and high all stay $290. Assumed valuation is unused on this row. Separate electrical (Table 1A-E) is extra and is not computed. The model rounds the official $290 to $290 before adding it to the all-in estimate. Source: SF DBI Table 1A-C Plumbing/Mechanical, effective July 12, 2026 (https://media.api.sf.gov/documents/Table_1A-C_-_Plumbing_Mechanical_2026.pdf).

Why are the low, typical, and high HVAC permit fees $290, $290, and $290 in San Francisco?

The official typical project value is $7,500. Assumed valuation is unused on this row (not listed); Category 1M is not a valuation fee. Table 1A-C Category 1M mechanical gas appliance is $290 and is included. Low, typical, and high all use that same path, so the official fees are $290, $290, and $290. The $290 high is the same total as the $290 typical and is not added on top of it. The model rounds those listed fees to $290, $290, and $290 before adding them to the all-in estimate.

Is the Table 1A-E electrical permit included in the $290 HVAC fee in San Francisco?

No. Separate electrical (Table 1A-E) is extra and is not computed on this row. The official totals are Category 1M only: $290, $290, and $290. This page does not invent a Table 1A-E electrical permit fee, and it does not add electrical dollars to the Category 1M $290. Confirm any electrical scope with San Francisco Department of Building Inspection (DBI).