What Is Happening With Commercial Insurance Costs in the GTA? 📍

Commercial property insurance premiums across the Greater Toronto Area have increased between 18 and 30 percent since 2023, according to Insurance Bureau of Canada data and broker surveys, making insurance one of the fastest-growing operating expenses for Ontario property owners in 2026. This trend has direct consequences for property values because the income approach to commercial real estate appraisal relies on net operating income (NOI). NOI is a property's total gross revenue minus all operating expenses, excluding debt service and capital expenditures. When insurance eats into that figure, values follow it down.

"For a GTA commercial property valued using a 6% cap rate, every $10,000 increase in annual insurance premiums translates to approximately $167,000 in reduced appraised value under the income approach, making insurance one of the most impactful single-line expense changes an AACI-designated appraiser can identify in 2026."

The shift is not academic. Owners refinancing in the current environment are discovering that their property's appraised value has dropped since their last valuation, even when rents have held steady. The culprit, in many cases, is the insurance line on the operating statement. A thorough commercial property appraisal captures these expense changes and ensures the valuation reflects real-world conditions rather than outdated assumptions.

What's Driving This Change? 🔍

As of Q2 2026, three primary factors are pushing GTA commercial insurance premiums higher: increased severe weather claims across Ontario, rising construction replacement costs, and a hardening global reinsurance market that has persisted since 2023. Each of these factors compounds the others, and none shows signs of reversing quickly.

Severe weather events in Ontario caused over $3.1 billion in insured property losses in 2024, according to the Insurance Bureau of Canada. That was the third consecutive year above $2 billion. Insurers pass those losses forward through higher premiums, and commercial properties with flat roofs, older mechanical systems, or flood-zone exposure face the steepest increases. A cap rate (capitalization rate) is the ratio of a property's net operating income to its market value. When expenses rise and cap rates remain stable, the math produces a lower value. That is exactly what is happening across the GTA.

Construction costs have also played a role. Replacement cost estimates, which underpin both insurance coverage amounts and the cost approach to appraisal, have risen roughly 35 percent since 2021 according to Statistics Canada's Building Construction Price Index. Higher replacement costs mean higher coverage requirements and higher premiums. Owners of industrial properties with large footprints have felt this acutely, even though their per-square-foot premiums remain lower than other property types.

The global reinsurance market, which provides insurance to insurers, tightened significantly in 2023 and has not meaningfully loosened. Swiss Re's 2025 Global Insurance Review noted that reinsurance pricing for property catastrophe risk remained 20 to 25 percent above 2022 levels. Canadian commercial property owners sit at the end of that chain, absorbing costs that originated with wildfire seasons in Western Canada and hurricane losses in the southeastern United States.

How Does This Trend Play Out Differently Across Ontario Regions? 🗺️

Insurance cost increases vary meaningfully by property type and subregion, with GTA multi-unit residential buildings seeing premiums rise 25 to 30 percent since 2023, while Southwestern Ontario industrial properties have experienced more moderate increases of 12 to 18 percent. The variation reflects differences in building age, construction type, claims history, and local hazard exposure.

Markets like Toronto and Mississauga illustrate different aspects of this trend. In Toronto's older multi-unit residential stock, buildings constructed before 1980 are seeing the steepest premium increases because insurers view aging plumbing and electrical systems as higher-risk. In Mississauga's industrial corridors, premiums have risen more modestly, but the sheer size of the insured footprint means even a 15 percent increase translates into a significant dollar figure.

The Niagara Region and parts of the Golden Horseshoe face an additional wrinkle: flood-zone reclassification. Updated floodplain mapping released by conservation authorities in 2025 expanded the number of commercial properties falling within designated flood zones. Properties in these zones face premium surcharges of 10 to 40 percent above standard commercial rates. For owners seeking investment analysis in Hamilton, understanding whether a property falls within updated flood boundaries is now a material appraisal consideration.

What Should Property Owners in the GTA Do Now? 🏢

GTA property owners should order an updated commercial real estate appraisal before initiating any refinancing, sale, or estate planning process, because valuations completed more than 12 months ago likely understate current insurance expenses and overstate the property's market value. Acting now, rather than waiting for premiums to stabilize, protects owners from surprises during lender underwriting.

In our experience working with property owners across the GTA, Ontario, many are unaware that their insurance costs have risen enough to shift the appraised value by $200,000 or more. The disconnect often surfaces only when a lender orders a new appraisal during refinancing and the number comes in below the owner's expectation. Ordering an appraisal proactively gives owners time to adjust their strategy.

Owners considering mortgage refinancing appraisals should factor in the following:

• A 25 percent insurance increase on a $50,000 annual premium adds $12,500 to operating expenses, reducing NOI and potentially lowering appraised value by over $200,000 at a 6% cap rate.
• Timing matters: refinancing before the next renewal cycle, if premiums are expected to rise further, can lock in a higher valuation and better loan terms.
• Capital improvements like upgraded fire suppression, roofing, and electrical panels can lower premiums by 10 to 15 percent and simultaneously support higher appraised values under both the income and cost approaches.

For owners with mixed-use properties, insurance cost pressure is particularly acute. Insurers often apply the risk profile of the highest-risk component (typically the residential or food-service portion) to the entire building, which can inflate premiums beyond what a pure commercial or pure residential property would face.

What Should Brokers Tell Their Clients About This Trend? 🤝

Mortgage brokers should request current insurance renewal quotes from every commercial client before initiating a financing application, because lenders in 2026 are rejecting appraisals that rely on outdated insurance expense figures. This single step can prevent costly delays and renegotiations mid-deal.

The shift in lender behaviour is significant. Several major Canadian banks, including those underwriting CMHC-insured multi-unit loans, now require proof of current insurance premiums at the underwriting stage rather than accepting historical averages. If the appraisal uses a two-year-old insurance figure and the lender's underwriter adjusts it upward, the resulting NOI compression can reduce the approved loan amount by 5 to 10 percent.

When advising clients on investment analysis, brokers should model scenarios with insurance cost increases of 8 to 12 percent annually over the next two years. This gives buyers and existing owners a realistic picture of forward NOI and prevents overvaluation at acquisition. CUSPAP-compliant appraisals from AACI-certified firms will reflect current insurance expenses, giving brokers a defensible valuation to present to lenders.

Brokers working with clients in the Vaughan and Brampton industrial corridors should note that while insurance increases have been more moderate for industrial assets, the absolute dollar amounts on large-format warehouses can still be substantial. A 100,000-square-foot industrial building seeing a 15 percent premium increase may absorb $15,000 to $25,000 in additional annual cost, enough to move the appraised value materially.

How Does This Trend Affect Commercial Appraisals in Ontario? ⚖️

Rising insurance costs directly affect the income approach to commercial real estate appraisal by reducing stabilized NOI, and AACI-designated appraisers following CUSPAP standards must reflect current and projected insurance expenses rather than relying on historical averages. This requirement means that appraisals completed in 2026 will often produce lower values than reports from 2024 for the same property, even if rents have not changed.

The income approach is the primary valuation method for income-producing commercial properties in Ontario. An AACI-certified appraiser constructs a stabilized income and expense statement, applies a market-derived cap rate, and arrives at the property's market value. Insurance sits on the expense side of that equation. When the expense rises and the cap rate holds steady, the resulting value drops proportionally.

The cost approach is also affected. Replacement cost estimates, which form the basis of the cost approach, have risen in tandem with the construction cost increases that are driving higher insurance premiums. For newer properties or specialized buildings where the cost approach carries significant weight, the appraiser must reconcile higher replacement costs with the economic obsolescence created by elevated operating expenses. AACI-designated appraisers are trained to navigate this tension under CUSPAP standards.

"Aion Appraisals & Consulting Inc. provides CUSPAP-compliant commercial real estate appraisal reports prepared by AACI-designated appraisers who verify every operating expense line item, including current insurance premiums, ensuring that lenders and owners receive valuations grounded in 2026 market realities rather than outdated assumptions."

For specialized situations like insurance appraisals, the connection is especially direct. An insurance appraisal determines the replacement cost value of a property for coverage purposes. If the insurance appraisal is outdated, the property may be underinsured, which creates both financial risk and potential issues with coinsurance clauses. Properties in markets like Oakville and Markham with high replacement costs per square foot should update insurance appraisals every two to three years in the current environment.

Aion Appraisals & Consulting Inc. provides CUSPAP-compliant commercial appraisals across Ontario, completed by AACI-designated appraisers with a verified 5-day turnaround and 100% lender approval rate. All reports meet the standards required by major Canadian lenders, CMHC, and institutional investors.

What's the Outlook for the GTA Over the Next 12 Months? 📈

Most indicators suggest GTA commercial insurance premiums will continue rising 8 to 12 percent annually through early 2027, as the global reinsurance market remains firm and Ontario severe weather claims show no sign of declining, according to Insurance Bureau of Canada projections released in Q1 2026. Property owners and brokers should plan for insurance to remain one of the fastest-growing operating expense categories for the foreseeable future.

There are a few potential moderating factors. If the Bank of Canada's current policy rate holds steady or declines further, borrowing costs may offset some of the NOI compression caused by higher insurance. Additionally, Ontario's updated building code requirements, which took effect in January 2026, mandate improved weather-resilience features in new commercial construction. Over time, these requirements should reduce claims frequency for newer buildings and moderate premium growth for properties that meet the new standards.

For existing building owners, the most effective strategy is to invest in the capital improvements that insurers reward with lower premiums: fire suppression upgrades, roof replacements, backup power systems, and water damage mitigation. These investments serve double duty by lowering insurance costs and supporting higher appraised values under both the income and cost approaches.

For readers ready to act: mortgage refinancing appraisals in Toronto provide a starting point for understanding how current insurance costs are affecting your property's value in today's market.

Frequently Asked Questions ❓

How do rising insurance costs affect my commercial property's appraised value?

Rising insurance premiums reduce net operating income (NOI), which directly lowers the value produced by the income approach to appraisal. For a GTA commercial property with a 6% cap rate, every $10,000 increase in annual insurance costs translates to roughly $167,000 in lost appraised value. AACI-designated appraisers account for actual and projected insurance expenses when building income and expense statements for CUSPAP-compliant reports.

Should I get a commercial appraisal now or wait for insurance premiums to stabilize?

Property owners should not wait. Insurance premiums across the GTA are projected to rise another 8 to 12 percent through early 2027, according to industry forecasts from the Insurance Bureau of Canada. Delaying an appraisal means your current valuation may overstate NOI and create issues at refinancing. A current commercial real estate appraisal from an AACI-certified firm captures today's actual insurance burden and gives lenders a defensible figure.

What is net operating income and why does it matter for my commercial property?

Net operating income (NOI) is a property's total gross revenue minus all operating expenses, excluding debt service and capital expenditures. NOI is the single most important figure in the income approach to commercial real estate appraisal because it forms the numerator in the cap rate equation. When operating expenses like insurance rise faster than rents, NOI compresses, and appraised values fall proportionally. AACI-designated appraisers verify every line item of the NOI statement under CUSPAP standards.

How are lenders reacting to higher insurance costs on commercial properties in 2026?

Lenders are scrutinizing insurance expense lines more closely in 2026. Several major Canadian banks now require proof of current insurance premiums at underwriting, rather than relying on historical averages. Brokers should advise clients to gather updated insurance quotes before submitting a financing application. Lenders also expect CUSPAP-compliant appraisals that reflect actual 2026 insurance costs rather than trailing-year figures, which may understate the true expense burden.

Which GTA property types are most affected by rising insurance premiums?

Older multi-unit residential buildings and retail properties with high replacement costs have seen the steepest insurance increases across the GTA, with premiums rising 25 to 30 percent since 2023. Industrial properties have experienced more moderate increases of 12 to 18 percent due to simpler construction and lower liability profiles. Mixed-use properties face compounding risk because insurers often apply the highest-risk component rate to the entire building.

What documentation is needed for a commercial appraisal in Ontario?

A CUSPAP-compliant commercial appraisal in Ontario typically requires current rent rolls, operating expense statements including insurance premiums, and recent property tax assessments. Providing up-to-date insurance documentation is especially important in the current environment where premiums are changing rapidly. Aion Appraisals & Consulting Inc. completes most commercial real estate appraisal assignments within a 5-day turnaround, and all reports are prepared by AACI-designated appraisers.

How long does a commercial appraisal take in Ontario?

A commercial appraisal with Aion Appraisals & Consulting Inc. takes 5 business days from engagement to delivery. Complex portfolios or specialized property types may require additional time. All reports are prepared by AACI-designated appraisers, delivered in formats accepted by major Canadian lenders, and compliant with CUSPAP standards.

Can I reduce my insurance costs to protect my property's value?

Owners can take several steps to moderate insurance premiums, including upgrading fire suppression systems, improving roof condition, bundling policies, and increasing deductibles. In our experience working with property owners across the GTA, buildings with documented capital improvements typically secure premiums 10 to 15 percent lower than comparable properties without upgrades. These improvements also positively affect the cost approach in a retail property appraisal or any commercial valuation.

How should brokers factor insurance costs into client conversations about refinancing?

Brokers should request clients provide current insurance renewal quotes before initiating any refinancing discussion. If a client's insurance has increased 20 percent or more since their last appraisal, the previous appraised value likely overstates the property's current worth. Proactively ordering an updated CUSPAP-compliant appraisal from an AACI-certified appraiser prevents surprises during lender underwriting and strengthens the overall financing package.

Need a Current Valuation for Your Ontario Property?

Whether you are refinancing, planning an exit, or advising clients through a market where insurance costs are reshaping property values, an accurate appraisal from Aion Appraisals & Consulting Inc. starts with understanding current conditions. Our AACI-designated appraisers deliver defensible, CUSPAP-compliant reports with a 5-day turnaround and 100% lender approval rate.

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Last updated: April 16, 2026