Duplex Mini Split Installation in Austin, Flat Price from $2,000
Updated September 2026
Duplexes are common across the older neighborhoods surrounding the University of Texas, where a single-family house was split into two separate rental units at some point over the decades. That split rarely came with a split HVAC system. A lot of Austin duplexes still share one aging central unit between both sides, or rely on window units in each unit, which means one tenant's comfort and one tenant's electric bill are tangled up with the other's.
A mini split system gives each side of a duplex its own independent zone, its own thermostat, and if wired that way, its own electrical circuit separate from the other unit. Old West Minisplits prices this flat: $2,000 for one zone, $3,700 for two zones, $5,400 for three zones, and a lot of duplex jobs land at two zones, one per unit. That covers equipment, labor, line set, standard electrical, refrigerant, testing, and cleanup. Quote through the form on our homepage, no phone call needed.
What the Flat Price Covers (and What It Doesn't)
The $2,000 per zone price is all-in for a standard installation, and it is the same price whether you own one rental or a dozen. It includes the mini split heat pump unit, indoor air handler, line set, wiring, breaker, refrigerant, a condensate pump if needed, testing, and cleanup. We also touch up paint where the line set runs so the unit does not look like an afterthought at the next showing or lease renewal. No trip fees, no hidden charges, and no sales visit required just to get a number.
Three honest exceptions apply, and we flag them before you commit, never after the crew is on site. A very long line set, over 50 feet, adds a materials charge. A panel upgrade the property already needed is not included. Unusually difficult mounting, such as brick or stone exteriors that need special anchors, may add a small fee. We do not offer repair or warranty service on existing systems, but if a unit is failing or was installed poorly by someone else, a flat-price new install is often the cheaper long-term call than another service ticket.
Typical Duplex Jobs: One Zone Per Unit and Separated Circuits
The standard duplex job is two zones, one indoor head per unit, each tied to its own outdoor condenser or paired to a shared outdoor unit depending on layout, giving each tenant full control over their own space without affecting the other side. That solves the common duplex complaint of one tenant running the shared system too cold or too warm for the other.
Owners who want to bill tenants separately for electricity often want each unit's mini split on its own dedicated circuit, tied to that unit's meter rather than a shared house meter. We plan that wiring as part of the standard install, and it is included in the flat price, not billed as an extra.
Why Flat Pricing Works Better for Owners
A custom quote means scheduling a salesperson around a tenant's calendar, waiting on a bid, and hoping the number that comes back fits what you budgeted for the unit. Old West Minisplits skips the walkthrough. The price is posted, so you can pencil it into a renovation budget or a turnover schedule before you talk to anyone, and you never have to call anyone, because we do not publish a phone number. The quote form on our homepage is the only step between you and a scheduled install.
The price per zone holds whether the property sits blocks from campus or anywhere else along the I-35 corridor from Waco to San Antonio. One zone is $2,000, two zones is $3,700, three zones is $5,400, the same number for every unit in a portfolio, which makes budgeting across several properties simple.
How we compare
| Factor | Old West Minisplits | The usual |
|---|---|---|
| Pricing model | Flat price posted online, no custom quote needed | Custom quote after in-home visit, price varies per job |
| Home visit required | No, you can get a quote online and schedule remotely | Yes, most require a salesperson to come measure |
| Price per zone | $2,000 for 1 zone, $3,700 for 2, $5,400 for 3 | $3,000 to $6,000 per zone on average for a custom install |
| Included items | Equipment, labor, line set, standard electrical, refrigerant, testing, cleanup, paint touch-up | Varies; some include line set and refrigerant, some add charges for electrical or disposal |
| Surprise fees | None, we list the three exceptions before you agree | Common: trip fees, after-hours surcharges, extra for long line set or difficult mounting |
Straight answers
How much does a mini split cost per unit?
Our flat installed price is $2,000 for one zone, $3,700 for two zones, and $5,400 for three zones, the same price whether it is your only property or one of several. That covers a standard installation from start to finish, no per-project sales visit required to get the number.
Do you require a home visit to give me a quote?
No. Fill out the form on our homepage with the property details and zone count, and we send back the price. That makes it easy to budget across a rental, a turnover schedule, or a small portfolio without coordinating a visit for every property.
How do I get in touch or schedule a job?
Through the quote form on our homepage. We do not list a phone number for the business, so there is no call to make, just the form and a confirmation once details are set.
What is not included in the flat price?
Three things: a very long line set over 50 feet, a panel upgrade the property already needed regardless of the mini split, and unusually difficult mounting like brick or stone that needs special anchors. We flag any of these before you agree, never after the job starts.
Can each side of a duplex have a completely separate system?
Yes. A mini split is a self-contained zone, so each unit in a duplex can run its own independent system with its own thermostat rather than sharing ductwork or a single central unit.
Can the mini split for each unit be wired to that unit's own electric meter?
Yes, in most cases. We can wire each unit's dedicated circuit to that unit's meter rather than a shared house meter, which is a common request for owners who bill tenants separately for electricity.
Get the number today
No walkthrough, no sales pitch, and nothing to schedule around a tenant. Tell us the units and we'll tell you the price.
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