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Split system installation
cost in Australia

A split system costs $1,200–$4,150 fully installed in Australia, bedroom units from $1,200, large open-plan units up to $4,000, with unit size, brand tier and install complexity driving the spread.

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Installed price by unit size

2.5kW, bedroom or study
$1,200–$2,500
3.5kW, large bedroom
$1,500–$2,800
5kW, lounge or apartment living
$1,900–$3,200
7–8kW, open-plan living
$2,100–$4,000

Installed prices, unit + standard back-to-back installation. Shared scale.

Real quote data

What homeowners actually pay for splits

JobInstalled priceSuits
2.5kW split, back-to-back install $1,200–$1,900 Single bedroom or home office
3.5kW split, long pipe run or upper storey $1,700–$2,600 Bedrooms away from an external wall
5kW split, living room, standard install $1,900–$2,900 Apartment living area, medium lounge
7kW split + new dedicated circuit $2,600–$4,000 Large open-plan living zones
Three splits across the home, one visit $4,500–$7,500 Whole-home comfort without ducted
Cost drivers

What moves a split quote up or down

Back-to-back, or not

The cheap baseline: indoor unit on an external wall, condenser directly behind it. Every metre the two units drift apart adds piping, cabling and labour, the biggest single swing on most quotes.

Electrical work

Bigger units need a dedicated circuit, and older switchboards sometimes need an upgrade to take one. It's legitimate money, but it should be an itemised line, not a surprise on install day.

Walls, storeys and access

Double brick drills slower, upper-storey condensers need brackets or roof mounting, and tight side access slows everything. Mention the wall type and storey when you request quotes, it prices the job right first time.

Brand tier

The same 2.5kW capacity runs $1,200 in a budget brand and $2,300 in a premium one. Both cool the room, they differ on noise, efficiency and lifespan. See every brand priced by size.

Season

The identical install costs 15–20% more in January than May. If you can choose your month, choose the shoulder season, it's the easiest money saved in aircon.

City by city

Split system cost by city

CityTypical installed range
Sydney $1,350–$3,500 Splits in Sydney →
Melbourne $1,450–$3,700 Splits in Melbourne →
Brisbane $1,300–$3,500 Splits in Brisbane →
Perth $1,400–$3,600 Splits in Perth →
Adelaide $1,200–$3,500 Splits in Adelaide →
Gold Coast $1,400–$3,600 Splits in Gold Coast →
Canberra $1,550–$3,900 Splits in Canberra →
Newcastle $1,450–$3,650 Splits in Newcastle →
Wollongong $1,450–$3,650 Splits in Wollongong →
Sunshine Coast $1,400–$3,600 Splits in Sunshine Coast →
Geelong $1,450–$3,650 Splits in Geelong →
Hobart $1,550–$3,900 Splits in Hobart →
Darwin $1,600–$4,000 Splits in Darwin →
Townsville $1,500–$3,750 Splits in Townsville →
Cairns $1,500–$3,800 Splits in Cairns →
Orange $1,450–$3,700 Splits in Orange →
Dubbo $1,450–$3,700 Splits in Dubbo →
Wagga Wagga $1,450–$3,700 Splits in Wagga Wagga →
Albury $1,450–$3,700 Splits in Albury →
Tamworth $1,450–$3,700 Splits in Tamworth →
Bathurst $1,450–$3,700 Splits in Bathurst →
Coffs Harbour $1,400–$3,600 Splits in Coffs Harbour →
Port Macquarie $1,400–$3,600 Splits in Port Macquarie →
Central Coast $1,400–$3,550 Splits in Central Coast →
Ballarat $1,500–$3,750 Splits in Ballarat →
Bendigo $1,500–$3,750 Splits in Bendigo →
Shepparton $1,500–$3,750 Splits in Shepparton →
Mildura $1,550–$3,800 Splits in Mildura →
Warrnambool $1,500–$3,750 Splits in Warrnambool →
Traralgon $1,500–$3,750 Splits in Traralgon →
Toowoomba $1,400–$3,600 Splits in Toowoomba →
Bundaberg $1,450–$3,650 Splits in Bundaberg →
Hervey Bay $1,450–$3,650 Splits in Hervey Bay →
Gladstone $1,450–$3,650 Splits in Gladstone →
Mackay $1,500–$3,750 Splits in Mackay →
Rockhampton $1,500–$3,750 Splits in Rockhampton →
Mount Isa $1,650–$4,050 Splits in Mount Isa →
Bunbury $1,450–$3,650 Splits in Bunbury →
Geraldton $1,500–$3,750 Splits in Geraldton →
Kalgoorlie $1,600–$3,950 Splits in Kalgoorlie →
Albany $1,500–$3,750 Splits in Albany →
Mount Gambier $1,500–$3,700 Splits in Mount Gambier →
Launceston $1,550–$3,900 Splits in Launceston →
Alice Springs $1,650–$4,050 Splits in Alice Springs →
Mandurah $1,400–$3,600 Splits in Mandurah →
Busselton $1,450–$3,650 Splits in Busselton →
Nowra $1,400–$3,600 Splits in Nowra →
Lismore $1,400–$3,600 Splits in Lismore →
Devonport $1,550–$3,900 Splits in Devonport →
Burnie $1,550–$3,900 Splits in Burnie →
Wangaratta $1,500–$3,750 Splits in Wangaratta →
Karratha $1,700–$4,150 Splits in Karratha →
Port Hedland $1,700–$4,150 Splits in Port Hedland →
Broome $1,650–$4,050 Splits in Broome →
Katherine $1,650–$4,050 Splits in Katherine →
Logan $1,300–$3,500 Splits in Logan →
Ipswich $1,300–$3,500 Splits in Ipswich →
Tweed Heads $1,400–$3,600 Splits in Tweed Heads →
Maitland $1,450–$3,650 Splits in Maitland →

Range spans a small bedroom split to a large living-area split, fully installed. Each city guide breaks it down by size and suburb factors.

Split system cost questions

How much does a split system cost installed?
$1,200–$4,150 covers almost every standard install in Australia. Size sets the band: 2.5kW bedroom units from $1,200 installed, 5kW living-area units around $1,900–$3,200, and big 7–8kW open-plan units up to $4,000. Brand tier and install complexity set where you land inside the band.
Why do quotes vary so much for the same unit?
The install, not the box. A back-to-back install (indoor unit on an external wall, condenser directly behind) is the cheap baseline. Long pipe runs, upper-storey condensers, double-brick walls and switchboard work each add real labour and materials, which is why two homes can get honest quotes hundreds of dollars apart for the identical unit.
What size split system do I need?
The working rule is 120–150 watts of cooling per square metre: roughly 2.5kW for a bedroom, 5kW for a 30m² lounge, 7kW+ for open-plan living. Climate and sun exposure push you up the range. Our size calculator does it properly in thirty seconds, free, no email.
Can I install a split system myself?
No, and not just as advice: handling refrigerant legally requires an ARCtick licence, and the circuit work needs a licensed electrician. A DIY install is illegal, voids the manufacturer warranty, and shows up at resale. The install is where a split lives or dies, pay for it once, properly.
When is the cheapest time to buy a split system?
The shoulder seasons. Installers discount to fill autumn and early-spring calendars, and the same install carries a 15–20% premium in January when demand peaks and queues stretch. If your old unit is limping, replace it before summer, not during it.

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