Mini Split Installation in San Marcos, Texas, Flat Price, No Surprises
Updated September 2026
San Marcos summers are brutal. The combination of Hill Country sun and Hays County humidity puts a strain on any cooling system, especially if your house relies on window units, a portable AC in the bedroom, or an old system that wasn’t designed for this heat. If you’ve got an older home without ductwork, a garage you’re trying to turn into a workshop, a casita out back, or an addition that never got tied into the central HVAC, you already know the problem: ductless mini splits are the right solution, but most contractors make you sit through a sales pitch and then hit you with a custom quote that runs $3,000 to $6,000 per zone.
Old West Minisplits does it differently. We post flat installed prices, $2,000 for one zone, $3,700 for two, $5,400 for three, and we serve San Marcos as part of our I-35 corridor service area from Austin down to San Antonio. No in-home sales visit required, no trip fees, no add-ons for paint touch-up or standard electrical. We tell you the honest exceptions up front (a very long line set, a panel upgrade the house already needed, or unusually difficult mounting), and we never surprise you after the job starts. This is the same flat price whether you’re in a 1950s bungalow near the square or a newer build in Hays County with an un-air-conditioned garage.
What the Flat Price Covers, and What It Doesn’t
When you see $2,000 for a one-zone install, that includes the equipment, labor, line set, standard electrical work up to the disconnect, refrigerant, a full system test, and cleanup. It also includes a run to Home Depot for touch-up paint so the wall looks the way it did before we arrived. There are no trip fees, no hidden permit charges, no "we noticed a problem" upsell after we start. The only exceptions we ever add are a long line set (if the distance between the indoor and outdoor unit exceeds what’s included), an electrical panel upgrade that your house needed anyway, or an unusually difficult mounting situation, and we tell you about those before you approve the job. That’s it.
Typical San Marcos Installations
We do a lot of work in older San Marcos homes, the kind with no central air, or with window units that block the view and drip into buckets. Those homes are ideal for ductless systems because you avoid tearing open walls to run ductwork. We also frequently install in detached garages that have become woodshops or home gyms, in casitas and guest houses, in add-on rooms that never got HVAC, and in large bonus rooms that the central system just can’t keep up with. And because mini splits are heat pumps, they handle both the 100-degree Texas afternoons and the occasional 30-degree winter mornings, no separate furnace needed.
How We Compare to a Typical Quote-Based Install
Most HVAC contractors in the San Marcos area base their pricing on a custom quote that requires an in-home inspection and a sit-down discussion. Those quotes commonly come in between $3,000 and $6,000 per zone for ductless work, depending on brand, line set length, and what the contractor thinks the market will bear. Old West Minisplits posts one price for the entire I-35 corridor: $2,000 per zone. If your house requires an exception, we name it before you commit. You can book online without a salesperson ever knocking on your door. If that sounds simpler, it’s because it is.
How we compare
| Factor | Old West Minisplits | The usual |
|---|---|---|
| Pricing model | Flat price posted on our site, $2,000 per zone, no haggling | Custom quote after an in-home sales visit, typically $3,700–$6,000 per zone |
| Upfront honesty | Exceptions disclosed before work begins (long line set, panel upgrade, hard mount) | Often discovered and billed after the job starts |
| Scheduling | Book online, no sales call required | Requires an in-home appointment for a free estimate |
| Included items | Equipment, labor, line set, standard electrical, refrigerant, testing, cleanup, touch-up paint | Varies widely; trip fees, permits, or paint may be extra |
| Service area | Austin I-35 corridor, San Marcos to San Antonio, same flat price | Usually service a smaller radius or charge more for distance |
Straight answers
How much does a mini split cost in San Marcos?
With Old West Minisplits, the installed price is $2,000 for one zone, $3,700 for two, and $5,400 for three, same price as the rest of our I-35 corridor service area. Most quote-based contractors charge $3,000 to $6,000 per zone in this area.
Do mini splits work for both heating and cooling?
Yes. Mini splits are heat pumps: they cool efficiently in our 100-degree Central Texas summers and provide plenty of heat during mild Hays County winters. You don’t need a separate furnace.
What if my house needs something unusual, a long line set or a panel upgrade?
We tell you about any exceptions before you agree to the job. A very long line set, an electrical panel upgrade that the house needed anyway, or an unusually difficult mounting situation may add a charge. We never surprise you with hidden costs.
How do I schedule an installation in San Marcos?
You can schedule directly on our website without a phone call or in-home sales visit. We install across the I-35 corridor from Austin through San Marcos and down to San Antonio, and the posted flat price applies to all areas.
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