Mini-split installation cost depends on system size, the number of indoor units and installation complexity; most installations start around $5,000.

What Drives the Cost of a Mini-Split Installation

No two ductless installs are identical, which is why quotes vary so much from one home to the next. These are the factors that move the number the most:

  • Number of zones: A single-zone system has one outdoor unit and one indoor head. Multi-zone systems add an indoor unit for each room you want to control separately, and every head adds equipment, refrigerant line and labor.
  • Capacity: Larger or poorly insulated spaces need more cooling and heating capacity. Oversizing is not a shortcut. An oversized unit cools quickly, shuts off and never runs long enough to pull humidity out of the air, which matters in a Central Texas summer.
  • Indoor unit style: Wall-mounted heads are the most common and the most economical. Ceiling cassettes, floor-mounted units and concealed ducted units cost more and take more time to install.
  • Line set length and routing: The distance between the outdoor unit and each indoor head, and whether the lines run along an exterior wall or through the attic, affects both material and labor.
  • Electrical work: A mini-split needs its own dedicated circuit. If your panel is full or outdated, that work becomes part of the project.
  • Efficiency and features: Higher-efficiency inverter models, app-based controls and stronger heating performance in cold weather add to the equipment cost but can lower what you spend to run the system.

Where Mini-Splits Make the Most Sense

In Austin and San Antonio, ductless systems are a popular fix for the rooms a central system never quite reaches: garage conversions, bonus rooms, home offices, sunrooms, additions and detached casitas. Because the cooled air never travels through a hot attic duct, a mini-split avoids the duct losses that make those rooms hard to cool in the first place.

Most mini-splits are heat pumps, so the same unit warms the space during a hard freeze and cools it through August.

Mini-Split vs. Extending Your Ductwork

Homeowners often weigh a mini-split against running new ducts from the existing system. Extending ductwork through finished space is invasive, and if your central system is already working hard, adding another room to its load can leave the whole house less comfortable. A ductless unit handles the new space on its own. Our technicians will tell you plainly which option fits your home and your budget, and when a simple duct repair would solve the problem instead.

How Radiant Prices a Mini-Split Install

We start with a home visit to measure the space, talk through the zones you want, and look at your electrical panel and the cleanest routing for the lines. You receive a written quote that you approve before any work begins, with no surprise fees. Learn more about our ductless mini-split installation options for Austin and San Antonio homes.

Ready to cool a space your central system can’t? Call or schedule online with Radiant. Our licensed technicians have served Austin and San Antonio since 1999, and every installation is backed by our Home Comfort Guarantee.