The Condo Insurance Gap in Ontario: What the Master Policy Covers, and What You Must Insure Yourself
Standard unit, loss assessment, and the deductible chargeback every GTA condo owner overlooks
In Ontario, what does the condo corporation master policy cover, and what must an individual unit owner insure themselves?
Under Ontario’s Condominium Act, 1998 (s.99) and the Condominium Authority of Ontario (CAO), the corporation’s master policy must insure the common elements and the standard unit against major perils such as fire and water. It does not cover improvements or betterments you make, your contents, your personal liability, additional living expenses, or the corporation’s insurance deductible. Those fall to the owner through an individual condo unit owner policy, which should also include loss assessment coverage to close the deductible gap.
Source: Condominium Authority of Ontario (CAO, 2025); Condominium Act, 1998, s.99
Across the many GTA condo deals I handle, the same reflex comes up whenever insurance enters the conversation: doesn’t the building already have coverage — why would I buy my own? That assumption usually survives right up until the day the unit upstairs floods, or your own dishwasher hose fails and soaks the suites below — and a bill for tens of thousands of dollars lands on your kitchen table. Ontario condo insurance is a two-layer structure: the corporation’s master policy covers the building, and your personal policy covers you. Between them runs a clear but easily missed dividing line, and the most expensive thing sitting on that line is the deductible chargeback. Let me draw the whole line for you.
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Layer One: What the Corporation’s Master Policy Covers
Under section 99 of the Condominium Act, 1998, the corporation is legally required to insure the common elements (lobby, corridors, elevators, exterior walls, roof, garage) and the standard unit of every suite against major perils like fire and water. So if the building floods and damages the walls, structure and original infrastructure of your suite in its as-delivered state, the master policy is what rebuilds it. Crucially, that policy expressly excludes any improvements or betterments you have made since moving in.
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There is no province-wide standard-unit definition. It is set item by item in your condo’s declaration or a dedicated standard-unit by-law, describing what the suite contains in its original, standard state — typically the walls, structural base, original doors and original plumbing. As the CAO puts it, fixtures, furnishings, equipment and personal property are not considered part of a standard unit. Anything beyond that list is treated as your improvement, which you insure and repair yourself.
Layer Two, Step 1: Insure Your Betterments and Improvements
The quartz counter you installed, the upgraded flooring, custom cabinetry, smart-home wiring — anything past the declaration’s standard-unit line is a betterment, and the master policy pays nothing toward it. When you buy your personal condo policy, have your broker value this at full replacement cost. Otherwise, after a fire, you may find the building restored while your own tens of thousands in renovations come out of pocket.
Layer Two, Step 2: Cover Your Contents and Personal Liability
Furniture, appliances, clothing and electronics — your contents — plus, most importantly, personal liability, belong in your own policy. Liability coverage is the line of defence when you (or your tenant or guest) cause a loss to others: if your leak floods the three suites below, their damage may well fall to your liability coverage to settle. GTA towers pack suites tightly, floor over floor, so I advise buying a generous liability limit.
⚠️Under-buying loss assessment coverage is as good as not having it. Set the limit to match or exceed the building’s current deductible so no gap is left for you to fund.
Layer Two, Step 3: Add Additional Living Expenses
If your suite becomes uninhabitable after an insured loss and you have to rent elsewhere while it is repaired, those extra costs — additional living expenses (ALE) — come from your personal policy. Short-term rentals and hotels in the GTA are not cheap, and a water loss that takes months to repair makes this coverage a real cash-flow backstop.
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Loss assessment coverage protects you when the corporation’s master policy loss exceeds its limits, or its deductible is triggered, and the corporation assesses the shortfall proportionally across all owners — this coverage absorbs that sudden assessment on your behalf. It ties directly to the deductible chargeback in the next section. The core risk is the deductible gap: industry sources note that a decade ago master-policy deductibles were commonly 5,000 to 10,000 dollars, whereas deductibles of 25,000 dollars or more are now common, and water-damage deductibles in some buildings reach 50,000 to 100,000 dollars (CityTowers / CPR24 Restoration, 2024-2025). If your loss assessment coverage is only 10,000 while the building’s deductible is 25,000, the 15,000 gap is yours to pay.
🚨Do not treat the building’s policy as a reason to skip your own. The s.105 deductible chargeback ignores fault and looks only at where the loss began — one accidental leak can hand you a bill equal to the master-policy deductible, now commonly 25,000 dollars or more.
The Real Hidden Bomb: The Deductible Chargeback
This is the single point I most want every condo owner to remember. Under section 105 of the Condominium Act, 1998, if a loss arises from the act or omission of a unit owner (or their tenant or guest), the corporation may add the lesser of the repair cost and the master policy’s deductible to that owner as a common expense. Both the CAO and Miller Thomson (2023) confirm that section 105 does not require proof of negligence — if the loss originated on your side, even by pure accident, the bill is yours. Harsher still, if you do not pay, the corporation automatically holds a lien against your unit to recover the debt. That means a single aged dishwasher hose can hand you a bill of twenty or thirty thousand dollars.
Before You Buy: Ask for Three Documents
Before you write an offer or renew, get and read three things: (1) the insurance summary in the Status Certificate, for the master policy’s limits and deductible; (2) the declaration and standard-unit by-law, to see where your standard-unit boundary is drawn; and (3) whether a chargeback by-law exists that widens the circumstances of recovery. Take all three to a licensed insurance broker and have your personal policy’s loss assessment coverage set to at least match, ideally slightly exceed, the building’s current deductible. This step costs a few dollars of premium and holds off a bill in the tens of thousands.
This article is general education, not insurance or legal advice. Your exact responsibilities are governed by your condo’s declaration, by-laws and master policy wording, so confirm your specific coverage limits and terms with your licensed insurance broker or real estate lawyer.
Frequently Asked Questions
Is an Ontario condo owner legally required to buy personal insurance?
There is no law forcing individuals to buy it, but your condo’s declaration or by-laws very likely require it, and lenders usually do too. More practically, going without leaves you exposed to improvement losses, personal liability and the deductible chargeback. Per the CAO (2025), the master policy does not cover your upgrades or personal property — only your own policy can.
What is a deductible chargeback?
It is when a loss originates from an owner’s (or their tenant’s or guest’s) act or omission, and the corporation, under section 105 of the Condominium Act, 1998, adds the lesser of the repair cost and the master policy’s deductible to that owner as a common expense. Per the CAO and Miller Thomson (2023), it does not require proof of negligence.
How much loss assessment coverage should I buy?
The rule of thumb is to match, and ideally slightly exceed, your building’s current master-policy deductible. Per industry sources (CityTowers / CPR24, 2024-2025), deductibles of 25,000 dollars or more are now common, and water deductibles reach 50,000 to 100,000 dollars in some buildings, so a 10,000 limit is often not enough.
The suite above me flooded my unit — do I claim on the building’s policy or my own?
First identify which layer the loss lands on: the standard unit in its original state falls to the master policy, while your post-move-in improvements and contents fall to your own policy. If the upstairs owner is at fault, it may trigger a s.105 chargeback against them. The exact split is governed by the declaration, standard-unit by-law and master policy, so contact both property management and your broker.
Why have GTA condo insurance deductibles risen so sharply?
Mainly from frequent water-damage claims, repair-cost inflation and more severe weather combined. Per CityTowers and CPR24 Restoration (2024-2025), deductibles that were commonly 5,000 to 10,000 dollars a decade ago are now typically 25,000 or more, with some buildings that have a claims history reaching as high as 250,000 dollars.
Arthur Zhao
Real Estate Broker · FRI · ABR · SRS · PSA · MCNE · E-PRO · CLHMS & GUILD Elite · REAIS
VP & Branch Manager, Bay Street Group Inc.
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