New AC Installation in Perth metropolitan
New AC installation covers fitting a system into a home or business that either has no existing air conditioning or is replacing an old unit with a different type. In Perth this usually means split systems for a single room or two, multi-head splits for several rooms off one outdoor condenser, or ducted refrigerated systems that condition the whole house through ceiling vents. Some older properties still get evaporative systems installed or swapped over, which suit Perth's dry summer heat but behave differently to refrigerated cooling. We've listed 361 businesses in this category across the metro area, from small owner-operator outfits to larger teams running multiple installation crews.
A proper installation involves more than mounting a unit. It includes a heat load calculation for the room or house, correct sizing of the system (undersized units run constantly and wear out faster, oversized ones cycle poorly and waste energy), correct refrigerant pipe runs, electrical work to code, and for ducted systems, a duct layout that actually balances airflow between rooms. Good installers will explain sizing, show you the brand and model options at different price points, and give you a written quote that separates equipment cost from labour, electrical, and any roof or wall work.
When comparing contractors, look at licensing (refrigerant handling and electrical work both require specific licenses in WA), warranty terms on both parts and labour, and whether they do their own installs or subcontract. Our scoring weighs verified customer feedback, responsiveness, and consistency of work across jobs, which is explained fully on our methodology page. For a ranked shortlist of installers in this category, see our best air conditioning contractors in Perth guide.
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All new ac installation, ranked by score and relevance
361 businesses. The order weighs each business's overall score by how much of its reviewed work is new ac installation, so a lower-scored specialist can rank above a higher-scored generalist. Filter and sort below, or open the full map view.
When you submit an enquiry through this site, it may be shared with partner providers who offer the service. We may receive a referral fee, but our rankings and scores are based only on our published method and are not influenced by fees.
Common questions about new ac installation
- How much does new AC installation cost in Perth?
- A single split system installation typically runs from around $1,500 to $3,500 including the unit, depending on brand and capacity. Multi-head splits and ducted refrigerated systems for a whole house are a bigger jump, often $6,000 to $15,000 or more depending on house size, number of zones, and ductwork complexity. Evaporative systems usually sit between split and ducted refrigerated pricing. Always ask for a fixed quote after an on-site assessment rather than a phone estimate, since roof access, switchboard capacity, and wall construction all affect labour.
- How long does a new AC system last before it needs replacing?
- Most split and ducted refrigerated systems in Perth last 10 to 15 years with regular servicing, though heavy summer use and coastal salt air can shorten that. Evaporative systems often need pad and pump replacements every few years and a full unit replacement around the same 10 to 15 year mark. A system that's constantly needing repairs, losing cooling capacity, or costing more to run each year is usually cheaper to replace than keep patching.
- What should I expect on installation day?
- For a split system, expect a few hours: mounting the indoor unit, running refrigerant lines and drainage through a wall, positioning the outdoor condenser, and testing the system under load. Ducted installations take one to several days and involve roof space work, cutting vent openings, and running a new circuit from the switchboard. A reputable installer will walk you through the finished system, show you the thermostat or controller, and leave compliance paperwork for the electrical and refrigerant work.
- How do I judge whether an installer did a good job?
- Check that the outdoor unit sits level with adequate clearance for airflow, that pipework is properly insulated and clipped rather than loose, and that indoor units cool evenly without rattling or dripping. Ask whether they've provided a compliance certificate for the electrical work and registered the refrigerant handling as required. A contractor who under-quotes on capacity to win the job, or who can't explain why they chose a particular unit size for your space, is a warning sign.
Guides to choosing new ac installation
- What air conditioning installation costs in Perth
A plain-English breakdown of split system and multi-head installation pricing in Perth, what pushes the price up, and how to read a quote properly.
- What to expect from an air conditioning installation, step by step
A walk-through of a typical Perth air conditioning installation from site visit to test run, so you know what a good job looks like.
- Noise rules, council approval and body corporate consent for outdoor units in Perth
What to check about noise limits, council approval and strata consent before an outdoor air conditioning unit goes in, especially near a neighbour's window.