The SCC confirmed that clear exclusion clauses limit even “Guaranteed” coverage endorsements

The insureds argued that the Guaranteed Rebuilding Cost endorsement contained in their standard form homeowner’s policy covered the increased cost of rebuilding their flooded home to meet the local conservation authority’s regulations. The insurer refused to pay the increased costs relying on a compliance cost exclusion clause which prevented additional coverage for costs resulting from compliance with laws or regulations, beyond a limit of $10,000. The Supreme Court of Canada held that the regulatory exclusion applied as the GRC did not contain explicit language to override this provision. The insurer was not required to pay the additional rebuilding costs required to comply with the regulations beyond $10,000.

Insurance law – Property insurance – Homeowner’s insurance – Exclusions – Interpretation of policy; Practice – Appeal.

Emond v. Trillium Mutual Insurance Co., [2026] S.C.J. No. 3, Supreme Court of Canada, January 30, 2026, R. Wagner C.J. and A. Karakatsanis, S. Côté, M. Rowe, S.L. Martin, N. Kasirer, M. Jamal, M. O’Bonsawin and M.T. Moreau JJ.

The insureds’ home was destroyed in a flood. The property was insured under a standard form homeowner’s policy issued by Trillium Mutual Insurance Company, which included a Guaranteed Rebuilding Cost (GRC) endorsement. Reconstruction required compliance with local regulations imposed by the Mississippi Valley Conservation Authority, driving up the rebuilding costs to meet the environmental and safety standards. The insurer agreed to cover the costs of rebuilding the home, but it refused to pay the additional costs required to comply with the regulations.

At issue before the Supreme Court of Canada was whether the GRC endorsement entitled the insureds to full rebuilding costs of the home, including costs of compliance with the conservation authority’s requirements despite the compliance cost exclusion clause. If not, whether the nullification of coverage doctrine prevents an application of the compliance cost exclusion clause.

The insureds argued that the GRC endorsement guaranteed all rebuilding costs, including costs exceeding the policy limit, and therefore the GRC endorsement should override the regulatory exclusion.

The insurer relied on an exclusion that excluded coverage for increased costs resulting from compliance with laws or regulations. However, the policy contained a separate clause that allowed a limited allowance of $10,000 for building by-law and code compliance. The insurer argued the insureds were barred from recovering any compliance-related expenses beyond the $10,000 allowance.

The Court dismissed the appeal and held, based on a structured interpretation of the insurance policy, the regulatory exclusion applied.

The Court emphasized that insurance contracts must be interpreted as a whole. While endorsements may modify certain policy elements, they do not automatically override other provisions unless they contain explicit language which says so. The Court concluded that in this case, the GRC endorsement expanded the amount the insurer might have to pay for rebuilding costs, but it did not expand the types of costs covered. The base policy clearly excluded additional costs resulting from compliance with laws or regulations, and those costs remained excluded.

Further, the Court rejected the application of the nullification doctrine in these circumstances. The doctrine only applies in narrow circumstances where an exclusion renders coverage essentially irrelevant. In this case, the policy continued to provide substantial rebuilding coverage under the GRC and therefore the doctrine did not apply.

The dissenting opinion of the Court expressed concerns with the practical application of this ruling for homeowners. The interaction between the endorsement and the exclusion creates ambiguity. Using the example of older homes which often require compliance with modern building codes, such exclusions could undermine the purpose of GRC coverage.

This case was digested by Jayden Friesen-Kehler and edited by Steven W. Abramson. If you would like to discuss this case further, please feel free to contact them directly at [email protected] or [email protected].