Ductless mini-splits are ideal for additions, garages, bonus rooms, and homes without ductwork. Here's what mini-split installation costs in 2026, how single-zone and multi-zone pricing works, and how to quote one quickly.
A single-zone ductless mini-split typically runs $3,500 to $8,000 installed in 2026. Multi-zone systems — one outdoor condenser feeding multiple indoor heads — cost more in total but less per zone, often landing around $2,500 to $5,000 per additional head.
The biggest cost drivers are the number of indoor heads (zones), the capacity of each, line-set length, and the difficulty of running line sets and condensate drains.
A single-zone system is the most cost-effective way to condition one space. Multi-zone systems share one outdoor unit across several rooms, each with its own indoor head and thermostat — more expensive overall but efficient and flexible for whole-home ductless conversions.
Mini-split quotes vary a lot by zone count and routing, so a clear, itemized estimate matters. In Fast Estimate, pick the job type, note the number of zones, snap a few photos, and let AI draft the line items — then send a branded PDF the homeowner can sign and pay a deposit on. Start a free trial.
A single-zone ductless mini-split typically runs $3,500 to $8,000 installed in 2026. Multi-zone systems cost more in total but less per zone — roughly $6,000 – $12,000 for two zones and $8,000 – $16,000 for three, with additional heads around $2,500 to $5,000 each.
Most ductless mini-splits are heat pumps that both heat and cool, making them a popular year-round solution for spaces without ductwork.
One indoor head per space you want to control independently. Open-plan areas may need only one head, while separate bedrooms each typically get their own zone.
For additions or homes without existing ducts, a ductless mini-split is usually far cheaper and less invasive than installing new ductwork for a central system.