When the Perth mercury shatters the 40°C mark, running a business without a fully cracking HVAC system is a absolute nightmare. If the ducted aircon in your Malaga warehouse or Osborne Park office blocks suddenly packs up, your staff start melting, productivity goes out the window, and customers run for the hills.
But once the dust settles and you call out the local sparkies or fridge mechanics to look at the system, the real headache begins: Who actually pays for commercial aircon maintenance in Western Australia? Is it the landlord’s job, or is the tenant getting stuck with the bill?
Unlike residential rentals—where Consumer Protection WA gives landlords most of the heavy lifting—commercial and retail shop leases in WA are a completely different kettle of fish.
At Air Cool Care, we handle massive commercial deep cleans, duct sanitization, and mould remediation right across the Perth metro area. We’ve seen plenty of local businesses end up in a proper blues over HVAC maintenance clauses.
Here is the fair-dinkum breakdown of commercial aircon rules in WA so you don’t get caught out.
1. The Big Difference: It’s All About the Lease
Here’s the straight-shooting truth: in WA, there is no single, catch-all law that dictates who pays for commercial property aircon repairs. Instead, everything boils down to what is written in your specific commercial lease agreement.Because these documents are highly customized, understanding your exact repair and maintenance obligations under commercial leases is crucial before any work begins.
When a commercial lease is drawn up, the landlord’s lawyer usually writes it to favor the landlord. This means if you didn’t haggle over the details before signing on the dotted line, you might be in for a nasty shock.
Generally, commercial HVAC setups are managed under three distinct frameworks:
The Maintenance Breakdown Matrix
| What Needs Doing? | Who Usually Pays? | The Legal Reality in WA |
|---|---|---|
| Routine Maintenance (e.g., quarterly filter cleans, belt checks, system optimization) | Tenant (Lessee) | Almost always the tenant’s job as part of keeping the leased space in good nick. |
| Outgoings / Operational Costs (e.g., annual HVAC servicing contracts) | Tenant (Lessee) | Landlords often pass building running costs (outgoings) straight down to the tenant. |
| Capital Replacement / Structural (e.g., the entire rooftop compressor unit kicks the bucket) | Landlord (Lessor) | Major plant equipment replacements or structural building faults usually fall on the landlord. |
2. Tenant Responsibilities: Outgoings and Routine Upkeep
If you are leasing a commercial space in a busy industrial hub like Balcatta or a retail shop in Subiaco, your lease will likely state that you must maintain the premises in a “state of good repair”.
The Outgoings Trap
In most WA commercial agreements, the landlord will list HVAC maintenance as an outgoing. This means even if the landlord organizes a preventative maintenance contract to keep the building compliant, they will pass that invoice straight down to you.
As the commercial tenant, you are generally on the hook for:
- Quarterly Filter Rinses & Cleans: Keeping the return air grilles clear of office dust or warehouse grime.
- Biannual System Checks: Paying for regular technician call-outs to check refrigerant gas levels, electrical connections, and fan belts.
- Tenant-Caused Issues: If your business operations (like a commercial kitchen generating massive grease or a manufacturing plant kicking up fine dust) choke up the system, the cleanup is 100% on your dollar.
3. Landlord Obligations: Structural Integrity & Major Plant Equipment
While tenants look after the day-to-day running of the units, commercial landlords cannot simply wash their hands of the entire system.
Capital Expenditure vs. General Repairs
If a commercial HVAC system is completely ancient and the compressor unit on the roof explodes or drops a valve due to standard wear and tear, this is usually classified as capital expenditure or a structural repair.
Unless the lease explicitly states the tenant must completely replace the landlord’s asset, the cost of a brand-new multi-thousand-dollar plant system shouldn’t be slapped onto a tenant. Landlords are responsible for keeping the core building skeleton and its major attached machinery functioning.
4. The Massive Commercial Gray Area: Sick Building Syndrome & Mould
Here is where things get incredibly messy for Perth business owners. If your office staff start getting hit with constant allergies, or a retail shop in a shopping center starts smelling like a damp cave, you are likely dealing with deep-seated mould growth inside the ducted system or internal barrel fans.
If a mould dispute kicks off, the Small Business Development Corporation (SBDC) or the State Administrative Tribunal (SAT) will look at one core question: What caused the biological growth?
- If it’s a Landlord Problem: If a roof leak over a West Perth office building has dripped rainwater directly into the ceiling space, soaking the insulated ducting runs and causing toxic spores to breed, that is a structural building fault. The landlord must fork out for the structural fix and professional decontamination.
- If it’s a Tenant Problem: If a tenant runs a gym or a high-moisture business, never uses extraction fans, and leaves the AC cranking on freezing temperatures overnight with zero ventilation, they’ve built a mould incubator. The tenant will be forced to pay for a commercial deep chemical clean to remediate the asset.
5. Expert Advice for Perth Business Owners & Landlords
If you want to keep your commercial property running smoothly without copping massive emergency repair bills during a December heatwave, you need to be proactive.
Air Cool Care Fair-Dinkum Tip for Perth Commercial Tenants: Before you sign any retail or commercial lease, check the HVAC clauses with a fine-tooth comb. Request an independent Property Condition Report (PCR) specifically for the air conditioning system before taking the keys. If the internal coils are already choked with black mould and dust from the bloke who leased the place before you, demand the landlord pays for a professional deep clean before your lease kicks off. Otherwise, you inherit that filth and the operational drop in efficiency!
Get Your Commercial System Sorted Today
Don’t wait until your staff are sweating through their shirts and your stock is ruining. Whether you are a property manager scheduling mandatory building maintenance, a landlord protecting an expensive mechanical asset, or a local business owner whose office aircon is blowing weak, dusty air, the team at Air Cool Care can get it sorted.
We specialize in high-pressure commercial duct cleaning, split system sanitization, and heavy-duty coil flushes tailored to Perth’s unique retail and industrial spaces.
👉 Contact the Air Cool Care team today to get an expert commercial inspection booked, and keep your business running cold all summer long.