Commercial Building Insurance. Know what it would actually cost to rebuild.
Quick answerCommercial building insurance covers the cost of repairing or rebuilding your commercial property after an insured event. What decides whether it works is the sum insured: it needs to reflect what your building would actually cost to rebuild today, not its market value or what you paid. For commercial building owners, ring us on 07 3292 1111.
You could already be paying for a policy that would not rebuild this building. Nothing tells you that today. The claim tells you.
If you are insuring a home or a car rather than a business, start here instead.
Most people shopping for commercial building insurance start with price. The owners who get caught out started there too. The thing that decides whether your policy actually works is not the premium, it is whether the sum insured reflects what your building would really cost to rebuild today. Get that right and the rest follows. Get it wrong and even a well-priced policy can pay out far less than you expected, at the worst possible time. Fit-for-purpose insurance at a competitive rate begins with the number, and this page is about getting the number right.
What commercial building insurance covers
Quick answerCommercial building insurance covers the building itself: structure, permanent fixtures and fittings, and external improvements like fencing, car parks and signage. It responds to insured events such as fire, storm, impact and, where your policy includes it, flood. It does not cover contents, stock, your income if you cannot trade, or a tenant's property. Those are separate covers, and getting the split right is part of the job.
What this policy is built to cover:
- The building structure itself, and permanent fixtures and fittings.
- External improvements: fencing, car parks, retaining walls, signage, and similar.
- Insured events including fire, storm, impact and water damage from burst pipes or leaks.
Flood cover on a commercial building policy is not automatic everywhere: of the wordings we place, two include it as standard, six cover it only if you have added it and it shows on your schedule, and one does not offer it at all. None of the wordings we place prints a separate dollar sub-limit for flood, so check your schedule rather than assume a cap. Owners in northern Queensland may benefit from lower premiums through the federal Cyclone Reinsurance Pool, whose $5 million threshold is assessed across all the locations on one policy. Insurers subscribed to the pool apply the reduction automatically in their pricing.
In northern Queensland, our Cairns and Townsville pages set out how cover is placed and priced in cyclone country. In Brisbane, our commercial building insurance in Brisbane page covers the four flood layers Council maps, the hail history over the roof, and the heritage and character overlays, and what each does to the price and the sum insured.
What it costs, roughly. For a plain $2 million commercial building with nothing unusual about it, the premium as at September 2026 commonly lands somewhere between about $6,000 and $20,000 a year. A retail shop sits at the bottom of that range, a restaurant with deep frying near the top. That is orientation, not a quote; the only way to know your number is to get a quote against your actual risk.
What commercial building insurance does not cover, and where that cover lives
| What sits outside this policy | The cover that holds it |
|---|---|
| Contents, stock and fitout you own | Commercial Property Insurance |
| Your income if the building cannot be used | Business Interruption Insurance |
| Your legal liability as the property owner | Property Owners Liability |
| A tenant's own stock, fitout and contents | The tenant's own cover, not yours, which is the split leases exist to draw |
The rule that protects your home insurance doesn't protect your building
Quick answerHome insurance is usually forgiving about underinsurance; a commercial policy often is not. Fall well short of your building's real rebuild cost and a co-insurance clause can scale a partial claim down in proportion to the shortfall. On a total loss, most wordings we place pay up to 120 per cent of sum insured; beyond that, the gap is yours.
Most commercial building owners learned insurance through their home policy, and home insurance is surprisingly forgiving. Underinsure your house, lose the roof in a storm, and in most cases the insurer still pays the full roof repair. So owners assume their commercial building works the same way. It doesn't. Commercial policies can apply a co-insurance clause, sometimes called an underinsurance or average clause.
Fall well short of your building's real rebuild cost and the insurer can scale a partial claim down in proportion to the shortfall. On a total loss the problem flips: on most of the wordings we place, the policy pays up to 120 per cent of your sum insured, and every dollar between that and the real rebuild cost is yours. Nobody rings to warn you the rules changed when you bought the building. Consider this the phone call.
Talk to a broker who will actually look at your cover
What happens when you ring us
Quick answerThe first call is a conversation about your building, not a quote form. It starts with what is driving you and what keeps you up at night. It ends with you knowing whether the number on your policy would actually rebuild it.
- It starts with you, not the policy. What is driving the call, and what keeps you up at night about this building. Everything after that depends on the answer.
- Then the number. The desktop building replacement valuation we commission at no cost to you, and why your sum insured decides whether the policy works.
- Two questions you will be asked. Why did you buy insurance in the first place? The answer is always the same: to replace what you have. So why has the building never been valued? That is usually where the conversation turns.
- You get off the phone knowing where you stand. Whether your cover is right, where the gap is if there is one, and what closing it would take.
What happens if your building is insured for the wrong amount?
Quick answerThe most expensive mistake in commercial building insurance is not failing to buy cover. It is buying the wrong amount. If your sum insured is below about 80% of your building's true rebuild cost, a co-insurance (average) clause can scale a partial claim down in proportion to the shortfall. The same clause sits in direct products bought online, so going direct does not avoid it. A current professional valuation is the way out: it makes the clause harmless, and on several of the wordings we place, the clause is switched off entirely where the sum insured is the full figure in that valuation.
The 80% test. Most commercial policies test your sum insured against at least 80% of what the building would actually cost to rebuild, and some wordings set the bar a little higher. Fall short and a partial claim is reduced in proportion. Carry half the cover you should and the reduction is severe: tens of thousands of dollars can come off a claim that was nowhere near your sum insured. The formula, the worked numbers and the real determinations are in The Co-Insurance Clause: What Every Building Owner Must Know.
Partial loss and total loss behave differently. On a partial loss, the clause scales your payout down in proportion to how far short you were. On a total loss, it does not simply pay your sum insured and stop: on at least seven of the nine wordings we place, the insurer pays up to 120 per cent of your sum insured per event, so you may recover more than the bare figure. If the sum insured itself is below the real rebuild cost, the shortfall is still yours.
Going direct does not get you out of this. One of Australia's largest insurers sells essentially the same commercial building policy both direct and through brokers. Both versions carry the identical co-insurance clause, tested the same way, with the same worked example. The difference is that with a direct policy, nobody whose job is to protect you is keeping your sum insured current against it.
The way out. The clause only bites when you are under-insured, so insure to a genuine rebuild figure, assessed rather than guessed. That is why we commission a desktop building replacement valuation at no cost to you, and on several of the wordings we place, the underinsurance clause is switched off entirely where the sum insured is the full figure in a current professional valuation by an approved valuer.
The 80% test is simply removed from your policy. It is not every wording and not every direct product, which is precisely the kind of thing a broker on a contestable panel can use on your behalf. A contestable panel means your risk goes out to several insurers who compete for it, instead of staying with the one you started with. We describe what the wording says here, not a claims outcome, and the real protection is still having the number right.
We commission that valuation at new business and again at every renewal, keeping it current and giving you the strongest case for the underinsurance escape on the wordings that offer it. See Desktop Building Replacement Valuation for how it works and how the escape is unlocked.
A real claim where the clause bit, and a broker still found ground to fight on
Sometimes a good broker can reduce the damage, though no one can undo it. In a 2025 storm claim CIB handled, a regional NSW landlord had insured a retail building for $500,000 against the roughly $1.99 million we advised in writing. The average clause still cut the partial-loss payout to about 48 cents in the dollar, worked out against 80% of the building's corrected value at claim time of about $1.31 million rather than against the higher figure we had advised. But CIB found two wording points the client's own paid claims advocate had missed, and the insurer amended the settlement onto our figure. The full story, and the honest lesson in it, is in The Co-Insurance Clause: What Every Building Owner Must Know.
Two policies, same sum insured. One pays hundreds of thousands more.
Most building owners think the sum insured is the whole story: insure for $1 million, get $1 million. It isn't. Policy wordings differ enormously in what they actually pay on top of that number, things like professional fees, demolition and debris removal after a serious loss. A strong broker wording can respond well above the sum insured when those costs land. A budget policy can cap you hard at the number on the certificate, and leave you funding the rest of the rebuild yourself. Same building, same sum insured, wildly different cheque. That difference is buried in wordings almost nobody reads. Reading them is our job.
Underinsured? We fix it at a pace you can afford.
Quick answerNobody has to fix a shortfall in one hit. We price the rebuild at what the building would genuinely cost today, then close the gap in stages, with options at every step. Where the premium is the obstacle we look at the excess: that excess costs you once; the gap costs you the rest of the building.
Most building owners are underinsured and don't know it, not because they're careless, but because they bought the building years ago and rebuild costs have jumped since. In the last five years alone, construction costs have risen dramatically. Nobody rings to tell you.
We work out what your building would genuinely cost to rebuild today. Then, if there's a gap, we close it over time, with options at every step, never a take-it-or-leave-it. Sometimes that means adjusting the excess to keep the premium workable. If a higher excess is what makes full cover affordable, that trade is worth it. The excess is a few thousand dollars once. The gap is the rest of your building.
Want a first read on your own building? Check your underinsurance risk in two minutes.
How we do it differently
Quick answerEvery commercial building we insure gets three things most brokers do not do as standard. A desktop building replacement valuation at no cost to you, so your number is right. Annual roof condition monitoring, because the roof is where most storm claims are won or lost. And personal advice on a contestable panel we remarket every year, instead of a renewal that rolls over.
Pillar one, the desktop valuation. We commission a desktop building replacement valuation at no cost to you, so your sum insured is a valuer's figure rather than a guess. What that number does to the underinsurance clause is set out in full further up this page. It is commissioned for our purposes as your broker, to inform the advice we give you. See Desktop Building Replacement Valuation.
Pillar two, the roof. Consolidated Insurance Brokers runs more than 1,200 aerial roof condition checks a year across our client base using Nearmap imagery. The roof is the part of a commercial building most exposed to storm, and most likely to turn a legitimate claim into a maintenance-exclusion argument. We look before the storm does. See Roof Condition Monitoring.
Pillar three, the panel. We place your cover on a contestable panel and remarket it every year, so a renewal is a decision, not a default. We hold insurers to account on wording and price, and we explain what is in your cover and what is not before a claim tests it. That is the difference between a broker and a mailbox.
Who needs commercial building insurance
Quick answerThis page is for anyone who owns a commercial building: offices, retail, warehouses, factories, medical centres, mixed-use. Whether you lease it to tenants, occupy it yourself, or both, the building needs cover built on the right rebuild figure. What differs is the rest of your risk, which is what our pages for each kind of owner sort out.
You might be:
- A commercial landlord who owns the building and leases it to tenants: For Commercial Property Owners and Commercial Landlords Insurance.
- An owner-occupier who owns the building and runs your own business from it: For Business Owner-Occupiers.
- An owner of a mixed-use or multi-tenanted property, where cover has to account for different tenancies and uses under one roof. Who insures shops below and units above depends on how it is owned, and mixed-use building insurance works through the three shapes.
- An owner of a lot in a commercial strata scheme, where the body corporate insures common property: Commercial Strata Insurance.
Whichever you are, For Commercial Building Owners walks through the ownership and structure questions in full; this page stays focused on the building and the number it is insured for.
Common commercial building insurance mistakes
Quick answerThe mistakes that cost building owners money at claim time are almost never about forgetting to buy insurance. They are about a sum insured that is guessed, stale, or set without anyone reading what the cheap policy left out.
- Using an online calculator instead of a desktop building replacement valuation. A calculator gives you a confident-looking number that can still fail the 80% test at claim time. It will not satisfy the valuation escape that would have removed the clause altogether.
- Not updating the sum insured for years. Rebuild costs have moved sharply while most sums insured sat still, so a figure that was right in 2021 is very likely short today. Adequacy is tested at the start of your policy period, not adjusted later.
- Not declaring modifications or a change of use. A renovation, an extension or a new type of tenant changes the risk, and if the insurer was never told, that change is what a declined claim gets pinned on.
- Ignoring the roof. A roof left to deteriorate turns a storm claim into a maintenance argument, because the insurer's first question after roof damage is whether it was already failing.
- Buying the cheapest premium without reading the exclusions. The lowest quote often buys a narrower wording, and the gap between it and a proper policy is invisible until the claim that lands in it.
- Leaving the building empty without telling your insurer. Most wordings put a clock on an unoccupied building, commonly around 90 days, after which cover can narrow or conditions apply. On a multi-tenancy building, the insurers' own question at underwriting is whether half or more of it is empty. Once you are on cover, most of the wordings we place keep the unoccupied-building exclusion off while the building is partly occupied. Tell your insurer as tenants leave rather than waiting.
The insurer doesn't rebuild your building. It writes a cheque.
Quick answerAn insurer does not put your building back, it writes a cheque, and you still face demolition, approvals, consultants, the builder's lead times and the rent that stopped. How big that cheque is, and the order the money comes out in, decides what your policy is actually being asked to fund.
Here's the mental picture most building owners carry: something terrible happens, and the insurance company swoops in and puts the building back the way it was. That's not how it works. What you actually get is a cheque. You still face the demolition, the approvals, the consultants, the builder's lead times, and the rent that stopped.
The only question the policy really answers is: how big is the cheque? If your sum insured is right and your wording is strong, big enough. If not, you'll be quoting the gap to your own bank. Everything we do, from the rebuild figure to the wording to the extras above the sum insured, is about making sure the cheque covers the whole story, not just the walls.
A settlement usually comes out in an order, and the building work sits at the end of it. Clearing the site and making it safe is paid first, because that cost can swing a long way: a steel or metal building costs more to clear than brick. On a total loss the building sum insured and the professional fees can then come through together.
A partial loss runs the same way: the clearing, then the fees to put the damaged area back, then the builders, the trades and the materials. The order tells you what your policy is actually being asked to fund, and in what sequence.
Reviewed by the people we insure.
We were fortunate enough to find Consolidated Insurance Brokers for our manufacturing factory earlier this year after our wonderful Broker of many many years retired. We had a significant level of service and communication from our previous Broker and we never thought we would be able to find another Broker who could do the same - until we found Tori Gordon from Consolidated Insurance Brokers! Tori is knowledgeable, friendly, highly professional and she has exceptional communication skills. She knows her craft, sideways and backwards! She took the time to personally custom our insurance needs by finding out everything about our company to ensure our coverage is adequate and thorough. Always happy to answer any questions, multiple times in one day! We are so very lucky to have found Tori and Consolidated Insurance Brokers... and recommend them highly!
I would very much like to thank Debbie Blanco for all her help in sorting out insurance to cover our commercial building on the Sunshine Coast. I had a lot of questions and she was very quick to respond and easy to talk to, and was able to give me all the answers that I needed. I will be using her services again for other insurances in the future. Cheers, Ken.
Aimee Spencer was an absolute rock star! She worked hard to get us insurance on our commercial property and helped us jump through hurdle after hurdle, due to the complexity of the request. Aimee was always super friendly & professional through the whole process, doing what she said she would do, persevering when things got tough, and came through when no-one else could. Amazing work Aimee! Can't recommend you enough!
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Commercial Building Insurance Australia: your questions answered
How much does commercial building insurance cost?
What sum insured should I use for my commercial building?
What is the 80% co-insurance rule?
Does a professional valuation actually change my policy?
Is commercial building insurance required for a mortgage?
Does it cover an old building, or one I have renovated?
Does commercial building insurance cover contents or lost income?
Does it cover the rent I lose while the building is repaired?
I am looking for insurance for buildings. Is this the right cover?
Does building insurance work differently in QLD?
Do I need a broker for commercial building insurance?
What makes one commercial building insurance policy better than another?
Do you arrange commercial building insurance in New South Wales?
What is commercial building insurance?
How does commercial building insurance work?
Who pays for building insurance on a commercial property?
Whose name should the building insurance be in?
Is building insurance a fixed cost?
At what point do you need building insurance?
What should you include in building insurance?
How often is building insurance paid?
What is underinsurance, and why does it matter for a commercial building?
What is the difference between commercial building insurance and commercial property insurance?
Related cover and reading
Information current as at 24/09/2026
The information on this page is general in nature and does not take into account your objectives, financial situation or needs. Before acting on it, consider whether it is appropriate for your circumstances. Where the information relates to a particular insurance product, consider the relevant Product Disclosure Statement before making a decision.
Get your commercial building insured for what it would really cost to rebuild.
We commission a desktop building replacement valuation at no cost to you, price it on a contestable panel, and on several of the wordings we place, insuring at the full valuation figure takes the underinsurance penalty off your policy. You walk away with a rebuild figure from a registered valuer's desktop assessment, a sum insured built on that figure, and the same check again at every renewal. Talk to a broker who checks the number before a claim does.
Call now, most enquiries are settled in one conversation - or leave your details and we'll ring within 90 minutes on a new enquiry (8am–6pm Mon–Fri).