HVAC Replacement Cost in San Antonio, TX (2026)
Updated October 2026 · San Antonio, TX · index 0.89
How much does a new HVAC system cost in San Antonio? For a 3-ton system with central AC + gas furnace, homeowners in San Antonio, TX pay about $9,400 on average, and most quotes land between $6,400 and $12,400 — $2,131 to $4,119 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 Antonio runs 11% below the U.S. average: construction labor in the San Antonio area runs 17% below the national mean, materials 2% below. The same job averages $10,500 nationally and about $9,500 at the Texas statewide index.
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HVAC replacement price in San Antonio by system type
What a 3-ton system costs in San Antonio with each system type, installed:
| Option | Average · range |
|---|---|
| Central AC + gas furnacesplit AC, matched coil and an 80,000 BTU furnace$3,125 per ton | $9,400$6,400 – $12,400 |
| Heat pump + air handlerall-electric split heat pump, no furnace$2,899 per ton | $8,700$5,850 – $11,600 |
| Cold-climate heat pump + air handlervariable-speed heat pump rated for deep winter$3,311 per ton | $9,950$6,700 – $13,200 |
The least expensive option in San Antonio is heat pump + air handler, at about $8,700; cold-climate heat pump + air handler averages $9,950, 1.1 times as much.
Cost to replace an HVAC system in San Antonio by size
With central AC + gas furnace, priced for San Antonio, TX:
| Size | Average · range |
|---|---|
| A 2-ton system$4,070 per ton | $8,150$5,550 – $10,700 |
| A 3-ton system$3,125 per ton | $9,400$6,400 – $12,400 |
| A 4-ton system$2,653 per ton | $10,600$7,250 – $14,000 |
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: $2,653 per ton for a 4-ton system against $4,070 for a 2-ton system.
What an HVAC replacement in San Antonio includes
Line by line, the $9,400 average for a 3-ton system breaks down like this: 32% labor, 65% materials and equipment, and $280 in permit fees passed through at cost.
| Line | Low – high |
|---|---|
| Load calculation and equipment sizing | $70 – $200 |
| Mechanical permit and inspection | $150 – $400 |
| Old system removed, refrigerant recovered | $300 – $540 |
| Gas furnace (about 80,000 BTU) | $1,350 – $2,450 |
| Outdoor unit, set on a new pad | $2,050 – $3,800 |
| Matched indoor coil | $880 – $1,900 |
| New refrigerant line set (25 ft) | $340 – $540 |
| Disconnect, whip and thermostat wire | $190 – $300 |
| Condensate drain and safety switch | $100 – $240 |
| Gas connection and furnace venting | $280 – $530 |
| Plenums and transitions to the ducts | $240 – $540 |
| Programmable or smart thermostat | $200 – $370 |
| Evacuation and refrigerant charge | $100 – $200 |
| Start-up and commissioning | $100 – $240 |
| Warranty registration and walk-through | $50 – $120 |
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 Antonio's index of 0.89; permit fees are not scaled.
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What affects HVAC replacement prices in San Antonio
Labor and materials in San Antonio
Construction wages in the San Antonio area run 17% below the U.S. mean (BLS, May 2025), and materials in its ZIP codes price 2% below the national average. Together they give San Antonio a construction cost index of 0.89.
Where San Antonio sits in Texas
San Antonio is the 10th most expensive of the 15 Texas cities in our index, against a statewide index of 0.90. Austin is the dearest at 0.94; McAllen is the least expensive at 0.80.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, San Antonio ranks 281st from the most expensive. The job that averages $9,400 here averages $10,500 at the national rate.
Climate a system is sized for in Texas
Contractors size equipment for the local design temperatures. Across Texas's counties the median is about 99°F on a hot summer day and 25°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 Texas
Texas's base state sales tax is 6.25%, 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 Antonio 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 Texas cities
A 3-ton system with central AC + gas furnace averages $9,400 in San Antonio; $9,900 in Austin, $8,650 in El Paso, $9,600 in Arlington.
| City | Average · range |
|---|---|
| Austin, TX6% more | $9,900$6,750 – $13,000 |
| El Paso, TX8% less | $8,650$5,900 – $11,400 |
| Arlington, TX2% more | $9,600$6,550 – $12,600 |
| Corpus Christi, TX1% less | $9,250$6,300 – $12,200 |
| Fort Worth, TX2% more | $9,600$6,550 – $12,600 |
| Lubbock, TX6% less | $8,850$6,050 – $11,700 |
| Frisco, TX2% more | $9,600$6,550 – $12,600 |
| McAllen, TX10% less | $8,450$5,750 – $11,100 |
HVAC replacement price in San Antonio: questions
How much does a new HVAC system cost in San Antonio, TX?
About $9,400 for a 3-ton system with central AC + gas furnace, and most San Antonio quotes fall between $6,400 and $12,400. That is 11% below the U.S. average, where the same job averages $10,500.
What is the HVAC price per ton in San Antonio?
$2,131 to $4,119 per ton, about $3,125 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 Antonio?
$7,250 to $14,000, about $10,600 on average, with central AC + gas furnace — $2,653 per ton.
Do you need a permit for HVAC replacement in San Antonio?
Yes — installing HVAC or fuel-burning equipment needs a permit nearly everywhere, San Antonio included. The prices on this page carry $150–$400 for the permit and inspection.
Does the price include sales tax in Texas?
No. The prices here are before tax; Texas's base state rate is 6.25%, plus any local rate.
What size HVAC system does a house in San Antonio 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 99°F in summer and 25°F in winter (the Texas median).
Other home projects in San Antonio
HVAC replacement cost in Texas
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 Antonio's construction cost index of 0.89.
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 Antonio, each on its own base: RSMeans residential 0.85, HUD 0.85, Craftsman 1.01. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in San Antonio 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