Introduction
Cost is almost always the first question Perth homeowners ask when looking at split system air conditioning. It is a fair question, and the honest answer is that it varies — sometimes considerably — depending on the system you choose and the specifics of your home. Rather than publish a number that may not reflect your situation, this article explains the factors that drive split system installation costs up or down, what to include in your budget planning and how to make sure you are comparing quotes on equal terms.
Why Split System Pricing Varies So Much
The split system market in Perth is competitive, with a wide range of brands, capacities and installation scenarios. Two homes in the same suburb can receive very different quotes for what appears to be the same job. Understanding why helps you ask better questions and evaluate quotes more confidently.
What Affects the Cost of a Split System Installation?
System Size and Capacity
Split systems are sized in kilowatts, and larger capacity units cost more to purchase. Choosing the right size for your space is important, an undersized unit will struggle in Perth summers, while an oversized one will short-cycle and wear out faster. Getting the sizing right from the start means the system earns its cost over its working life. If you are not sure what capacity you need, our article on split system sizing covers this in detail.
Brand and Model
Well-regarded brands such as Daikin, Fujitsu, Mitsubishi Electric and Panasonic carry strong reliability and warranty reputations. Their units typically sit at a higher price point than lesser-known alternatives, but they also tend to require fewer repairs over their working life and hold performance levels more consistently over time. The cheapest unit on paper is not always the most economical choice across a 15-year lifespan.
Pipe Run Length
A standard back-to-back installation, where the indoor and outdoor units are positioned on opposite sides of the same wall, typically includes approximately three metres of pipe. If your preferred layout requires the pipe to run further than this, additional length is charged per metre. Before accepting a quote, it is worth confirming what pipe run length is included and what the per-metre rate is for anything beyond that, so there are no surprises on the day.
Electrical Work
Most split system installations require a dedicated electrical circuit from your switchboard to the indoor unit. If your switchboard is already at capacity or needs upgrading to accommodate the new circuit, this adds to the cost. In older Perth homes, particularly those in established suburbs such as Bassendean, Bayswater, Nedlands or Subiaco, switchboard upgrades are not uncommon and are worth factoring into your budget before committing to a job.
Installation Difficulty
A straightforward installation on a single-storey brick home with easy roof and wall access is the simplest scenario and the quickest to complete. Installations involving high walls, double-storey homes, limited roof cavity access, rendered or concrete walls, or positions that require scaffolding will take longer and cost more in labour. Describing your home's layout clearly when requesting quotes helps ensure you receive an accurate figure rather than one that climbs once the technician is on site.
What to Watch for When Comparing Quotes
Split system installation is a competitive market, and quotes can look very different even for the same job. A few things worth checking when comparing:
• Confirm the pipe run length included in the quoted price and the rate for additional metres, so the final figure does not change once work begins.
• Check that the quote covers all electrical work required, including any switchboard modifications, rather than treating these as separate line items.
• Ask what brand and model is being supplied — entry-level units and premium models can look similar on a quote but perform very differently over time.
• Confirm the installer holds a current ARCtick refrigerant handling licence and relevant electrical licences. In Western Australia these are legal requirements, not optional.
• Be cautious of quotes that are significantly lower than others without a clear explanation, exclusions and variations can close that gap quickly once work is underway.
A detailed written quote that breaks down supply, installation labour and any additional works gives you a much clearer picture than a verbal estimate or a single lump sum.
Is It Worth Getting Multiple Quotes?
For a single straightforward installation, two quotes from reputable local installers is usually sufficient to give you a reasonable sense of the market. For larger or more complex jobs, multiple units, difficult access, or electrical upgrades involved, a third quote can be useful.
Price is one factor, but experience, licensing, the brands being offered and the quality of communication during the quoting process are all worth weighing alongside the bottom line. An installer who asks the right questions about your home during the quoting process is more likely to deliver an accurate price and a smooth installation than one who provides a figure without seeing the site.
Conclusion
Split system installation costs in Perth depend on a combination of system size, brand, pipe run length, electrical requirements and the complexity of your specific installation. The best way to understand what your project will cost is to get a detailed written quote from an experienced local installer who has assessed your home properly. That way the price you agree to is the price you pay.
Thinking about installing a split system in your Perth home?
Evap Specialists supplies and installs quality split systems across the Perth metro area, with honest upfront pricing and more than 20 years of local experience!
