In a significant decision reinforcing the principles of finality and procedural fairness in real estate litigation, the Ontario Court of Appeal has dismissed an attempt by cottage owners to introduce a new theory about their property line after ten years of litigation. The case, Becker v. Walgate, 2025 ONCA 696, serves as a crucial reminder to transactional lawyers about the importance of thoroughly investigating and advancing all possible theories before trial, because getting a second bite at the apple may prove impossible.
The Dispute
Martha and Jason Becker owned a cottage property on Jack Lake in the Kawarthas, adjacent to property owned by Walter Walgate. The neighbours were locked in a protracted dispute over their shared boundary line, with approximately 100 feet of water frontage at stake. The issue was complicated by the lake’s history: in 1902, the Crown granted the original patent, and in 1910, the federal government installed a dam that raised water levels beyond what existed at the time of the patent.
The Beckers initially argued that their lot line terminated at the Normal Controlled High Water Level (NCHWL), which was essentially the modern high-water mark. Walgate countered that the line terminated at the original 1902 water’s edge, which now sits somewhere underwater beyond the NCHWL.
The Appeal Court’s 2020 Decision
In 2020, the Court of Appeal sided with Walgate, holding that the boundary was indeed the 1902 water’s edge. The Court remitted three specific issues back to the Superior Court for determination: the location of the 1902 water’s edge, the effects of erosion or accretion on that boundary, and any riparian rights that might arise. Critically, the Court of Appeal’s order stated these determinations “will determine the terminus of the lot line between Lots 41 and 42.”
The New Theory Emerges
After the 2020 decision, the Beckers obtained a new expert report from Brian Ballantyne. While Ballantyne agreed with Walgate’s expert about the 1902 water’s edge location, he introduced a novel theory: there should be a 15-degree bend in the lot line between the NCHWL and the 1902 water’s edge. This bend would effectively give the disputed shoreline to the Beckers.
Rather than seeking to vary the Court of Appeal’s order and before the Superior Court had a chance to decide the remitted issues, the Beckers filed a second application seeking a declaration about this alleged bend and moved to consolidate it with the remitted trial. Walgate moved to dismiss the second application as inconsistent with the Court of Appeal’s order.
The Motion Judge’s Decision
Justice Leibovich granted Walgate’s motion, finding the second application was “clearly an attempt … to circumvent the order of the Court of Appeal and expand the scope of the new hearing.” He characterized it as a collateral attack on the appellate order.
Unsatisfied with the decision, the Beckers appealed, raising two issues: that Justice Leibovich erred in dismissing the second application because the terms of the 2020 decision did not preclude them from arguing the existence of the bend, and that the 2020 decision should be varied based on newly discovered facts.
The Court of Appeal’s Analysis
Writing for a unanimous panel, Justice Favreau upheld the dismissal, though on the broader ground of abuse of process rather than collateral attack. The Court emphasized several key principles:
Orders Must Be Read in Context: While the literal wording of the 2020 order didn’t explicitly preclude raising issues about the lot line’s shape, the order must be interpreted in light of the reasons for judgment, the litigation history, and the circumstances. The Court’s statement that the remitted issues “will determine” the lot line terminus made clear the intention was to finally resolve the boundary dispute.
The Doctrine of Abuse of Process: The Court held that allowing the bend theory at this stage would be an abuse of process because it raised an issue that could and should have been advanced in the original application. Once Walgate took the position that the lot line extended beyond the NCHWL, the Beckers could have argued for a bend in the line as an alternative theory. Parties cannot “lie in the weeds for strategic reasons and then spring a new theory at the last moment.”
Finality Matters: After ten years of litigation, including a full trial and appeal, the need for finality was paramount. The bend theory would open the door to “a whole gamut of additional expert evidence and potential impacts on adjoining properties.” Allowing such procedural maneuvers would undermine judicial economy and bring the administration of justice into disrepute.
Expert Reports Are Not New Facts: The Beckers’ reliance on Ballantyne’s opinion didn’t constitute “newly discovered facts” under Rule 59.06. Expert opinions on previously known facts are not new evidence for purposes of varying court orders—they represent evidence that was available for the initial hearing.
Practical Takeaways for Transactional Lawyers
This decision offers several important lessons:
- Instruct litigation counsel to advance all theories upfront: When referring clients to litigation counsel for boundary disputes or other real estate conflicts, emphasize the importance of investigating and advancing all possible theories at the outset. Courts will not permit litigation by instalment.
- Expert selection matters early: The Beckers tried to blame deficiencies in their first expert’s work, but the Court showed no sympathy. Choose qualified experts from the beginning and ensure they explore all potential theories.
- Court orders have finality: Once an appellate court has spoken, particularly when remitting specific issues for determination, the scope for revisiting or expanding those issues is extremely narrow. Rule 59.06 provides only limited grounds for varying orders, and courts will exercise that power sparingly.
- Context shapes interpretation: Even when transactional lawyers draft or review court orders, remember that courts will interpret them contextually, considering the reasons for judgment and the litigation history, not just the literal text.
