What Commercial Property Insurance Actually Costs (and Why Yours Might Be Wrong)
Why can't I get a straight answer on what commercial property insurance costs?
Quick answerBecause commercial property insurance is not one price for one thing. It is a stack of covers, the building, the rent it earns, the liability that comes with owning it, priced against your construction, your tenants, your location and your claims history. Identical-looking properties can carry premiums thousands of dollars apart, and both prices can be correct.
The price tables you find online read like they are helping. They are not. A premium is the output of a specific property's risk, not a category average. A tilt-slab warehouse with a bookkeeper inside does not cost what the same shed costs with a spray booth inside. A fully tenanted building does not cost what a half-vacant one costs. A building whose sum insured was checked by a valuer last year does not cost what one running on a 2021 guess costs, and only one of those premiums will actually hold up at claim time.
So instead of a fake number, Consolidated Insurance Brokers gives you what actually moves a commercial property premium, why the market is currently moving in your favour, and how to test whether the price on your renewal is right for your risk. If you want the short capsule answers first, the commercial property page carries them: what it costs, what decides the cost and why it got so expensive. This page is the long answer.
What am I actually paying for in a commercial property premium?
Quick answerThree covers do the heavy lifting: the building section, which rebuilds the asset; loss of rent, which keeps the income flowing while the rebuild happens; and liability, which defends and pays when someone is injured in connection with the property. Each has its own sum insured, and each moves the premium on its own.
This is the part most owners have never had explained. When your premium moves, it is rarely "insurance" that moved. It is one of the parts.
The building. Priced against what it would cost to rebuild today, not what you paid and not its market value. If rebuild costs rose and your sum insured rose with them, the premium follows, and that is the cover doing its job rather than the insurer doing you over.
The rent. Loss of rent cover is priced against your real annual rent and the indemnity period you choose. Whether your recoverable outgoings belong inside that figure is a question your lease answers, and getting it wrong in either direction means paying for the wrong number or claiming against one.
The liability. Owning a building is enough to get you sued over it, tenanted or not. The liability section is usually the cheapest of the three, which is exactly why cutting it to save money is a bad trade. Why property owners carry their own liability cover is its own subject.
The premium on your invoice is the sum of those parts. Which is why the first question about an expensive renewal is never "why is insurance so dear", it is "which part moved, and did the risk underneath it genuinely change".
What makes one commercial property cost more to insure than another?
Quick answerThe drivers insurers actually price: construction materials, what your tenants do inside the building, location and catastrophe exposure, vacancy, your security and fire protection, your five-year claims history, and the accuracy of the sums insured. Most are fixed. The ones that are not are where your premium can genuinely move.
The rating-factors capsule on the commercial property page lists them all. Three deserve the longer look, because they are the ones that move premiums by multiples rather than percentages.
Construction. Expanded polystyrene panel is the single most expensive surprise in commercial property insurance. Plenty of owners do not know it is in their building until an insurer's surveyor finds it, and once it makes up enough of the building, mainstream insurers stop quoting altogether and the risk moves to specialist markets that do not advertise. If your building has EPS, sandwich panel or unidentified cladding, the size of your premium is really a question about which market your broker can reach.
Tenant activity. The policy prices what happens inside the building, and it prices the riskiest tenant in it. A commercial kitchen or a workshop with hot works changes the fire risk of the whole property. That is fair pricing, but it also means an out-of-date occupation description can have you paying a kitchen premium for what is now an office, or worse, carrying a policy that describes a risk that no longer matches the claim you one day make.
Location. Cyclone and flood exposure change not just the price but the number of insurers willing to quote at all, which shrinks competition exactly where you need it most. The regional spread this creates is dramatic, and it is documented with real figures on the building-side cost guide, including what the federal cyclone reinsurance pool is doing to northern premiums.
Rates are falling. Why did my premium go up?
Quick answerCommercial property rates in the Pacific region, which includes Australia, fell around 14% in early 2026 on Marsh's Global Insurance Market Index. But your premium is a rate multiplied by a sum insured. If the sum insured rose this year, a genuinely lower rate can still produce a higher invoice.
Non-residential building construction costs rose 4.4% in the year to June 2026 on the ABS Producer Price Indexes, on top of several years of steep rises. When that flows into a corrected rebuild figure, the number your rate is applied to jumps, and the invoice can rise even while the insurer's pricing genuinely softened. That is not the market working against you. It is the price of finally insuring the property for what it would actually cost to rebuild.
The renewal to challenge is the other kind: the one that arrives higher, or the same, with nothing underneath having changed. A renewal nobody took back to market is not evidence of a fair price. It is evidence of a rollover. What our clients' renewals tend to look like when they arrive, and what we usually find underneath them, is written up in why did my commercial insurance go up.
Could a cheap premium mean my property is underinsured?
Quick answerYes, and it is the most common way underinsurance hides. A premium is a percentage of the sum insured, so a low premium and a stale sum insured look identical on an invoice. The difference only shows up at claim time, which is the most expensive place to discover it. On a partial loss, underinsurance can scale the payout down under the co-insurance clause; on a total loss the policy pays the full sum insured and the gap to the true rebuild cost is yours.
If your premium looks pleasingly low and nobody has professionally checked the rebuild figure in a few years, the discount may simply be that the insurer is pricing a number that could not actually rebuild your property. How that gap opens, and what it does to a partial claim under the co-insurance clause, is covered properly in our underinsurance guide and the co-insurance clause explained. The fix is simpler than most owners expect: we commission a desktop building replacement valuation at no cost to you, carried out by a registered valuer, commissioned for our purposes as your broker, to inform the advice we give you. You can also run a two-minute self-check first with the underinsurance risk checker.
How do I lower my commercial property premium without gutting the cover?
Quick answerThe same three levers that work for any commercial risk: a higher excess where it genuinely saves meaningful money, a policy properly tested against the market rather than rolled over, and fixing the risk factors insurers actually price, vacancy, maintenance and fire protection. None of them involve insuring for less than the property is worth.
Test the market properly. Every insurer has its own appetite, its own reinsurance costs and its own targets that month, which is why identical risks draw very different prices. As Steadfast members we take eligible business pack risks to the Steadfast Client Trading Platform panel, up to 9 insurers, plus a CGU padlock quote where it is competitive, so a renewal gets tested against real current appetite instead of rolled over. If you have only ever seen one number, you do not know where yours sits.
Use the excess deliberately. A higher excess you could genuinely absorb is a legitimate saving. A lower sum insured is not a saving, it is a bet against your own building.
Manage what insurers price. Disclose and manage vacancy rather than hoping the insurer never asks. Keep the maintenance documented. Fix the small things before they become the claims history that loads your next five years of premiums. A roof that is quietly deteriorating is the classic example, which is why we run aerial roof condition checks across our client base.
Have your commercial property premium properly tested
Or call us on 07 3292 1111 and ask which part of your premium is doing the moving.
FAQ
Is there an average cost for commercial property insurance in Australia?
Averages exist, but none of them will be your number, and planning around one is how budgets go wrong in both directions. The capsule answer, and why the only question that matters is whether your price is right for your specific risk, is on the commercial property page. What this guide adds is the machinery underneath: which parts of the premium move, and which of them you can actually do something about.
Can I insure my commercial property for its market value instead of the rebuild cost?
The building section should be set to rebuild cost, not market value or purchase price. The two numbers can sit a long way apart in either direction, and the policy only ever pays against the rebuild figure. A property in a premium location can have a market value far above its rebuild cost, and insuring at market value there just buys a bigger premium for no extra payout. The reverse, insuring at a market value below rebuild cost, is how underinsurance starts.
Should my loss of rent figure include outgoings?
It depends on your lease. If your tenants pay recoverable outgoings on top of rent, and an insured event stopped the property earning, the outgoings recovery can stop with the rent. Whether your figure should be rent alone or rent plus outgoings is exactly the kind of lease detail that belongs in the quoting conversation, and it is covered in the commercial landlord's insurance guide.
Why do I pay more than the owner of the identical building next door?
Because the policy prices more than the building. Different tenants, a different claims history, a different sum insured, a vacancy on one side and not the other, or simply a renewal that was market-tested against one that was rolled over. Two identical buildings with different premiums is not evidence of unfairness. Two identical risks with different premiums would be, and that is what a proper remarket finds out.
Related reading
- Commercial property insurance: the capsule answers and the six-way map of what "commercial property" actually means.
- What commercial building insurance costs: the building-side deep dive, with the real regional figures.
- The commercial landlord's insurance guide: rent, outgoings and who actually pays the premium.
- Underinsurance in commercial buildings: why a stale sum insured is a coverage problem, not a price win.
- The co-insurance clause explained: what an inaccurate sum insured costs at claim time.
- Desktop building replacement valuation: the fix, and the primary CTA.
- Why did my commercial insurance go up: what we actually find underneath renewal shocks.
- Insurance terms glossary: plain-English definitions of sum insured, excess and co-insurance.