Average mini-split installation cost
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.
Cost by number of zones
- Single-zone (1 head): ~$3,500 – $8,000 installed.
- Two-zone: ~$6,000 – $12,000 installed.
- Three-zone: ~$8,000 – $16,000 installed.
- Four-plus zones: ~$12,000 – $22,000+ installed.
Single-zone vs. multi-zone
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.
What changes the quote
- Number and capacity (BTU) of indoor heads.
- Head style: wall-mounted (cheapest), ceiling cassette, or floor-mounted.
- Line-set length and routing difficulty between indoor and outdoor units.
- Electrical: a dedicated circuit and sometimes a panel upgrade.
- Mounting, condensate pumps, and cosmetic line-hide covers.
- Heat-pump capability (most mini-splits both heat and cool).
Quote a mini-split in minutes
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 free or try the calculator first.