HVAC companies in San Antonio, TX

What HVAC work costs in San Antonio

Ranges are general estimates gathered from homeowner-reported quotes in the San Antonio area, not an offer or a quote for your project.

When to schedule HVAC work in San Antonio

San Antonio's cooling season typically runs from May through October, with July and August highs regularly in the upper 90s to low 100s, so AC failures during peak summer are treated as same-day emergencies by most licensed contractors. Hard, limestone-heavy municipal water leaves mineral scale in condensate lines and coils faster than in many markets, which is why local techs recommend condensate line flushes as part of routine maintenance. Winters are mild with only occasional hard freezes, but a February 2021-style freeze event can still strain older heat pumps and gas furnaces that sit unused most of the year.

Permits and HOA rules

HVAC replacement, new ductwork, and equipment changeouts inside San Antonio city limits require a mechanical permit from the City of San Antonio Development Services Department (DSD), filed by a registered mechanical contractor through the BuildSA online portal 4. The mechanical permit application requires the contractor's state license number and class, plus any applicable air conditioning or refrigeration endorsement 1. Contractors must also register their state mechanical license with DSD before pulling permits in the city 2. A final inspection is required before the system is considered complete, and skipping this step can void manufacturer warranties or cause problems at resale.

Licensing and insurance in Texas

Texas HVAC contractors must hold an Air Conditioning and Refrigeration Contractor (ACR) license issued by the Texas Department of Licensing and Regulation (TDLR) 3. Before hiring anyone in San Antonio, verify the contractor's ACR license number and status using TDLR's online license search 5, and confirm the same license is registered with the City of San Antonio DSD for permit purposes. Never allow work to begin under an unlicensed, lapsed, or unregistered license, since unlicensed operators are common in San Antonio during peak summer repair season.

What local homes and systems are up against

Many homes in older San Antonio neighborhoods like King William, Monte Vista, and Alamo Heights were built decades before central air was standard, so their ductwork is often undersized, leaky, or was added later as an afterthought. That means an AC replacement in these areas frequently turns into a ductwork evaluation as well, since new higher-efficiency equipment moves air differently than what the old ducts were designed for. Newer construction in Stone Oak and Helotes typically has better-sized ductwork but still faces the same brutal cooling load once summer arrives.

San Antonio's municipal water is notably hard, and the resulting mineral scale builds up in condensate drain lines and on evaporator coils faster than in softer-water cities, which is a common cause of clogged drains, water leaks near air handlers, and reduced airflow. Local contractors typically recommend condensate line flushes and coil cleaning as part of any seasonal tune-up, not just an optional add-on.

The industry-wide shift away from R-410A refrigerant toward R-454B and other lower-GWP blends is affecting new equipment sold in San Antonio in 2026, and homeowners replacing older systems should ask contractors directly which refrigerant a proposed system uses, since parts, tools, and future service costs differ between refrigerant types.

Because San Antonio's cooling season is so long, a failed AC in July or August in Southtown or Terrell Hills is a same-day priority call for most established local contractors, and it pays to already have a contractor relationship in place before the peak of summer hits.

How to vet and compare San Antonio HVAC pros

Start by confirming the contractor holds an active Texas ACR license through the TDLR online license search, and cross-check that the same license is registered with the City of San Antonio Development Services Department, since the city requires state mechanical license registration before permits can be pulled locally 2. A company that hesitates to give you its license number is a red flag.

Get at least two or three written estimates for any job over a couple thousand dollars, and make sure each one lists the same details: equipment brand and model, SEER2 rating, refrigerant type, ductwork scope, who is pulling the mechanical permit, and warranty terms on parts and labor. In a market with so much variation in home age and ductwork condition, a bid that skips a load calculation or ductwork inspection is worth questioning.

For repair-versus-replace decisions and typical failure-point costs, see our detailed HVAC repair cost guide for San Antonio. If you are comparing full-system replacement options and pricing, our San Antonio HVAC replacement cost guide breaks down equipment types and price ranges in more depth, and our guide on choosing a San Antonio HVAC company walks through vetting steps in detail.

Ready to skip the research and get matched with vetted local pros directly? You can compare San Antonio HVAC pros and get quotes without cold-calling companies one by one.

What HVAC work costs in San Antonio

Basic repairs like a failed capacitor or contactor generally run $150 to $400 in the San Antonio metro, while a compressor or evaporator coil failure can push costs to $1,100 to $2,700. Full split-system AC replacements typically run $4,500 to $8,000, and a SEER2-compliant replacement that also addresses undersized or leaky ductwork can reach $6,200 to $11,500 or more depending on scope.

Homes in older neighborhoods with original ductwork often need $1,800 to $6,500 in duct repair or replacement work alongside a new system, which is a cost many homeowners do not budget for until a contractor performs a proper inspection. For a full breakdown of repair costs by failure type, see our AC repair cost guide for San Antonio.

Prices tend to run higher during the peak June-through-August stretch when emergency dispatch fees rise with demand, so scheduling non-urgent replacement or maintenance work in spring or fall is one of the more reliable ways San Antonio homeowners control costs. CPS Energy also offers rebates on qualifying central AC and heat pump installs, ranging from $90 to $310 per ton depending on efficiency tier, which can offset a portion of replacement costs 6.

Permits and licensing before you sign

Any AC or furnace replacement, new ductwork run, or major equipment changeout inside San Antonio city limits needs a mechanical permit from DSD, filed through the BuildSA portal by a mechanical contractor registered with the city 4. The mechanical permit application itself requires the contractor's state license number, license class, and any air conditioning or refrigeration endorsement, so this information should already be on hand before you sign a contract 1.

Before work begins, verify the contractor's Texas ACR license directly through TDLR's license search tool, confirming it is active and free of unresolved complaints 5. A contract that is vague about who pulls the permit, or that proposes skipping the permit altogether to save time, is one of the most common sources of dispute after a San Antonio HVAC job goes wrong.

If you plan to apply for a CPS Energy HVAC rebate, keep in mind the rebate application requires permit information for City of San Antonio projects along with an itemized contractor invoice and AHRI certificate, so make sure your contractor documents the job accordingly from the start 7.

Frequently asked questions

See the FAQ section below for quick answers on repair timing, permits, licensing, rebates, and San Antonio's specific climate and water conditions.

Areas Henry covers

Alamo Heights · Stone Oak · Southtown · Terrell Hills · King William · Helotes · Monte Vista · Castle Hills

Common questions

San Antonio guides from The Henry Files

Nearby Texas markets