Bowman v. Martineau, 2020 ONCA 330
The Ontario Court of Appeal’s decision in Bowman v. Martineau is now a leading authority on how damages should be assessed when a real estate professional’s negligence induces a purchaser to buy a defective property but does not cause the defect itself.
The case is frequently cited, and just as frequently misunderstood.
Background
The Bowmans purchased a residential property that, unbeknownst to them, suffered from severe and longstanding water infiltration and mould. At trial, the Court found that:
- the Sellers had concealed the defects; and
- the Listing agent and Brokerage were negligent in failing to properly review, verify, and disclose information contained in the Seller Property Information Statement (SPIS).
Liability was not challenged on appeal. The only issue was damages.
The Trial Decision: Cost to Repair
Justice Di Tomaso awarded damages exceeding $450,000, the bulk of which reflected:
- the cost to repair the mould and water damage,
- alternative living expenses, and
- related consequential losses.
Liability was apportioned 70% to the agent and brokerage and 30% to the Sellers. This was a tort claim where the Negligence Act applied.
The Trial Judge reasoned that the Bowmans were entitled to what they thought they had purchased a home free of mould and water damage.
The Appeal: A Transactional Loss, Not a Property Damage Case
On appeal, the agent and brokerage argued that they did not cause the physical damage to the house and therefore should not be responsible for the cost of fixing it.
The Court of Appeal agreed.
The Court drew a critical distinction:
- The agent’s negligence did not cause the mould or water damage.
- Her negligence caused the Bowmans to enter into a transaction they would otherwise have avoided.
That distinction changed everything.
This was not a case about damage to property caused by negligence. It was a case about “negligent inducement into a bad bargain”.
The Correct Measure of Damages
Because the professionals did not cause the defect, the Court held that:
- the Bowmans were not entitled to a repaired, defect-free home; and
- awarding cost-of-repair damages would overcompensate them.
Instead, the proper measure of damages was:
Diminution in value —
- the difference between what the Bowmans paid and the actual value of the property in its defective condition, together with appropriate consequential losses.
Put simply, the law compensates buyers for “the bad deal they were induced to enter”, not for turning that deal into something they never would have purchased in the first place.
Why Bowman Is Often Misread
A common but incorrect interpretation of Bowman is that professionals can never be liable for repair costs unless they physically cause the defect.
That is not what the Court said.
The Court emphasized that damages must always align with causation:
- If professional negligence causes a defect, or causes the loss of a claim against someone who did, cost-to-repair damages may be appropriate.
- If the negligence merely causes entry into an undesirable transaction, damages are limited to overpayment and related losses.
Several cases relied on by the Court involved negligent professionals who were properly held liable for repair costs — because their negligence was causally connected to the property damage itself.
Mitigation and Foreseeability
The Court also upheld the Trial Judge’s findings that:
- the Bowmans did not fail to mitigate their damages by remaining in the transaction; and
- frost heave damage to the unheated home was a reasonably foreseeable consequence of being negligently induced into buying an uninhabitable property.
Consideration
Bowman v. Martineau reinforces a foundational principle of damages law:
Negligent inducement cases are about transactional loss, not reconstruction. Courts will restore plaintiffs to the position they would have been in but for the negligence, not place them in a better one.
Brian Madigan LL.B.
www.OntarioRealEstateSource.com