Quick answer
A ductless mini-split in Ontario costs $4,000–$7,000 installed for a single-zone system, $7,500–$11,000 for two zones and $10,000–$16,000+ for three or four. Cold-climate heat pump models that heat through winter add roughly $500–$1,500 per zone. The number of indoor heads, the length of the line sets, the electrical work and the wall you are drilling through set where you land in the range.
How much a ductless mini-split costs in Ontario depends mostly on how many rooms you want it to serve. One indoor head on one outdoor unit runs $4,000–$7,000 installed; each additional zone adds a head, a line set and a larger outdoor unit. Below are the price bands we quote from, what pushes a job up or down within them, and the situations around Burlington, Oakville and Hamilton where a mini-split is the right tool rather than a compromise.
Price by number of zones
- Single zone, one indoor head: $4,000–$7,000 installed. The typical case is one room, an addition, a home office over the garage or a finished basement that the central system never reached.
- Dual zone: $7,500–$11,000 installed. Two heads on one outdoor unit, commonly a main floor and a primary bedroom.
- Three to four zones: $10,000–$16,000+ installed. This is a whole-house solution for a home without ducts.
- Cold-climate heat pump models: add roughly $500–$1,500 per zone. They keep heating at temperatures where a standard model would give up, which is what makes them a real heating system rather than an air conditioner that also warms the room in October.
For comparison, central air on a house that already has ducts in good shape runs $3,500–$7,500 installed, so for whole-home cooling in a ducted house central air usually costs less. A mini-split wins where there are no ducts, where the ducts cannot reach, or where one room needs its own control. The trade-offs are set out in central air vs. ductless mini-split.
What moves the price inside the range
- The wall. A pre-war double-brick house in Kerr Village or Westdale needs a cored hole through two wythes of brick for the line set, and the interior wall often has no stud bay where you want the head. Frame and drywall is quicker.
- Line-set length and routing. A head on the far side of the house from the outdoor unit means more copper, more line-hide cover on the exterior, and sometimes a small condensate pump when the drain cannot fall by gravity to the outside.
- Electrical. Each outdoor unit needs its own dedicated circuit from the panel, and the work is filed with the Electrical Safety Authority. A 1950s–60s Aldershot bungalow still on a 100-amp panel with no free slots can need panel work before the mini-split goes in.
- The outdoor mounting. A wall bracket keeps the unit above the snow and out of a narrow side yard; a ground stand is cheaper but sits in the drift line on a north exposure.
- Head style. Wall-mounted heads are the base price. Ceiling cassettes and floor consoles cost more and suit rooms with no clear wall space.
- Brand tier. We install Mitsubishi, Fujitsu and Daikin; within a brand, the cold-climate lines carry the premium noted above.
Permits and paperwork in Halton and Hamilton
The electrical work is inspected through the ESA notification regardless of municipality. Whether a building permit is required for the mechanical side depends on where you are and what is being done; see do I need a permit to install an AC in Ontario. Condominium boards nearly always require written approval before an outdoor unit goes on a balcony or exterior wall, and many refuse it outright, which is worth confirming before you collect quotes.
Where mini-splits make the most sense locally
The clearest cases are houses that heat with a boiler and radiators and have no ductwork at all: the pre-war brick streets of Old Oakville, Kerr Village and Westdale, and the older centre of Dundas. A three- or four-zone system is the first central cooling those houses have ever had. The second case is an addition or a converted garage where extending the existing ducts would starve the rest of the house; a ductless mini-split solves it without touching the existing system.
The third case is the hot second floor of a 1970s–90s subdivision house in Glen Abbey or Tyandaga, where a single head in the primary bedroom fixes the room the central system loses every July. Whether that is worth it against other fixes is the subject of is a ductless mini-split worth it.
Cooling-only mini-splits get no rebate; cold-climate models may
A cooling-only mini-split does not attract rebates. A cold-climate ductless heat pump that meets a program's efficiency criteria may, and the incentives change often enough that we check the current terms at quote time rather than promising a figure. On running cost, the inverter compressor in a mini-split ramps down to a trickle once the room is at temperature, which is what makes it cheap to leave on through a Burlington Hydro or Oakville Hydro on-peak afternoon.
ZK Mechanical designs and installs ductless mini-split systems across Burlington, Oakville and Hamilton, and we quote the zones, the electrical and the wall work as separate lines so you can see what each room is costing. For cooling in Oakville or anywhere nearby, request a written quote.