How Much Does Split System Air Conditioning Installation Cost in Perth?
Split system pricing in Perth scales with the unit's capacity, which is chosen based on the size of the room. Here's what to expect installed.
Typical price
$1,250–$4,725 installed, depending on unit size
2.5kW (bedroom size)
$1,250–$2,625
5kW (living room size)
$1,900–$3,675
7kW (large room size)
$2,300–$4,725
Switchboard upgrade (if needed)
+$200–$800
These are estimates based on typical Perth pricing, not a quote - get an exact price for your job by posting it free on Locentra.
Prices last reviewed: August 2026
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What affects the price
- Unit capacity and brand - larger rooms need a higher kW rating, which costs more.
- Wall type - installing through brick vs. cladding or double-brick affects labour time.
- Distance between the indoor and outdoor unit, which affects piping and cabling costs.
- Whether your switchboard can handle the new unit or needs an upgrade first.
- Split system vs. ducted - this guide covers split systems, which are cheaper to install than ducted air conditioning.
Frequently asked questions
How do I know what size split system I need?
Unit size (kW) is matched to room size - a small bedroom typically needs a 2.5kW unit, a living room around 5kW, and larger open-plan areas 7kW or more. An installer can confirm the right size for your specific room.
Why would I need a switchboard upgrade?
Older switchboards sometimes don't have capacity for a new air conditioning circuit, so an upgrade may be required before installation - this is usually identified during the initial quote.
Is split system cheaper than ducted air conditioning?
Yes, generally - a single split system is a much smaller job than a ducted system covering a whole house, both in unit cost and installation labour. Ducted systems suit whole-home cooling but come at a significantly higher price point.
Other Perth cost guides
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