Limited Coverage does not Mean it’s a Nullity: SCC Clarifies the Doctrine of Nullification

In Emond v Trillium Mutual Insurance Co., 2026 SCC 3, the Supreme Court of Canada considered the limits of the doctrine of nullification and clarified how it ought to be applied in the context of the Ledcor framework for interpreting insurance contracts.

There has been a tendency for insureds to treat the doctrine as a general fairness principle that permits courts to rescue coverage whenever an exclusion appears harsh or undermines the insured's expectations.

Emond suggests that the SCC does not view the doctrine that broadly. While the court reaffirmed that the doctrine remains a valid part of Canadian insurance law, it emphasized that nullification will apply only in rare circumstances where an exclusion completely defeats the purpose of the coverage purchased.

This decision provides important guidance to insurers, brokers, and counsel regarding the relationship between policy interpretation and the doctrine of nullification, while confirming that clear policy language will generally be enforced absent truly exceptional circumstances.

Background

The Emonds’ home was declared a total loss following a flood in 2019. Their policy with Trillium included both a standard homeowners' policy and an optional "Guaranteed Rebuilding Cost Coverage" endorsement ("GRC endorsement").

Trillium acknowledged coverage for the flood loss. However, a dispute arose regarding whether the policy covered the increased costs associated with satisfying the new regulatory requirements that significantly increased reconstruction costs.

The insureds’ position was that the GRC endorsement effectively guaranteed the full cost of rebuilding their home. Whereas, Trillium relied on an exclusion contained within the base homeowners' policy, which excluded increased costs arising from laws regulating zoning, demolition, repair, or construction, subject to a limited CAD 10,000 exception.

The doctrine of nullification

Recently, the Ontario Court of Appeal described nullification as preventing “insurance contracts from being construed so as to defeat the coverage the policy provides, thereby defeating the very objective of the insurance contract and rendering it nugatory” thereby allowing an insurer to collect premiums without assuming any meaningful risk (Ontario v. St. Paul Fire and Marine Insurance Company, 2023 ONCA 173, at para. 31).

The insureds argued that applying the exclusion would effectively deprive them of the benefit of the GRC endorsement for which they had paid an additional premium. Their position was that an insurer should not be permitted to sell enhanced coverage while relying on exclusions elsewhere in the policy to take away the very protection purchased.

The court's analysis

Trillium argued that the doctrine of nullification should only apply where there is ambiguity in the policy language. If a policy offers coverage and unambiguously eviscerated that coverage elsewhere in the policy, nullification cannot apply.

This was extensively discussed in Turpin v. The Manufacturers Life Insurance Company, 2013 BCCA 282, where the BC Court of Appeal stated that nullification is “not a doctrinal concept, but simply interpretive aids to be invoked in the face of ambiguity.” While the court in this case disagreed that ambiguity was necessary for nullification to apply, it agreed that “to preserve the functional effect of the nullification rule, which applies even when faced with unambiguous language, it must now be recognized that it operates apart from this interpretive exercise.”

After determining that the policy language unambiguously excluded the increased compliance costs, the court turned to whether the doctrine of nullification nevertheless prevented application of the exclusion.

The majority held that it did not.

The court emphasized that the real purpose of the GRC endorsement was not to cover every conceivable rebuilding expense. Rather, the GRC endorsement allowed the insureds to recover rebuilding costs even where those costs exceeded the amount of insurance identified on the declarations page.

Although the compliance cost exclusion reduced the amount the insureds could recover, it did not eliminate the benefit under the GRC endorsement. The insureds could still receive the protection for which they had paid: the ability to recover rebuilding costs beyond the policy limits.

As a result, the exclusion did not render the endorsement nugatory or valueless. It merely limited one category of recoverable loss. The high threshold required for nullification was not met.

The court ultimately dismissed the appeal and confirmed that increased compliance costs remained excluded from coverage beyond the policy's limited CAD 10,000 building code compliance extension.

Why the decision matters

The Supreme Court's decision in Emond provides clarity regarding the continued role of the doctrine of nullification in Canadian insurance law. So long as the coverage grant continues to provide meaningful protection and is not rendered effectively illusory, courts should be reluctant to disregard a clear exclusion simply because it substantially limits recovery in a particular case.

The decision reinforces that exclusions will not be invalidated merely because they narrow or significantly limit coverage. Rather, nullification will arise only where the exclusion strips the coverage of its essential purpose and leaves the insured with little or nothing of the benefit for which the premium was paid. In Emond, the endorsement still delivered meaningful protection, and that was enough for the exclusion to stand.