Last Updated: August 28 2026
Can a Judge reconsider a decision in Ontario if a mistake seems to have been made after judgment?
In Ontario, once a judge issues a decision it is generally final and only reconsideration is sought in very unusual, rare circumstances, typically where all parties agree there was an obvious clear error and the interests of justice require reopening rather than an appeal. In Gupta v. Lindal Cedar Homes Ltd., 2020 ONSC 7524, the court notes reconsideration should be used sparingly and with the greatest care, meaning you usually need more than disagreement with the outcome; you need clear error and party agreement. If you are considering a request for reconsideration, Gutoski Legal Services can help you understand the practical standards and next steps for paralegal support across Ontario; call (289) 902-0227 today.
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If a Judge Makes a Mistake In a Decision Can the Judge Be Asked to Review the Decision?
Court Decisions Are Usually Final, Subject Only to Appeal, Unless All Parties Agree That the Judge Should Reconsider a Decision Due to What Appears As An Obvious Error.
Note: Please contact Gutoski Legal Services by phone at: (289) 902-0227 to discuss any specific questions that you may have.
Understanding When It May Be Appropriate to Ask a Judge to Reconsider a Court Decision
The process of law, including the making of a court decision, seeks to bring finality to issues in dispute. Accordingly, when a legal case is decided upon, generally, it is expected that the decision becomes final despite any judicial errors unless an Appeal is brought to a higher court. As such, it is very rare that a Judge will reconsider a decision.
The Law
Generally, a court has the jurisdiction to control its process which includes the power to review a decision of itself; however, whether a court should review a decision of itself still remains questionable and should occur only where it becomes obvious to the court and parties that a decision was flawed and the parties consent to a reconsideration. This issue was specifically addressed within the case of Gupta v. Lindal Cedar Homes Ltd., 2020 ONSC 7524 wherein it was said:
[6] The court has an inherent jurisdiction to adjust a litigation result after judgment in some circumstances, other than through proper appellate review or as contemplated by r. 59.06. However, this should occur only in “unusual and rare circumstances where the interests of justice compel such a result”: Susin v. Chapman, [2004] O.J. No. 2935 (C.A.), at para. 10. Finality in litigation is to be encouraged and fostered. The discretion to re-open a matter should be resorted to “sparingly and with the greatest care”: 671122 Ontario Ltd. v. Sagaz Industries Canada Inc., 2001 SCC 59 (CanLII), [2001] 2 S.C.R. 983, at para. 61.
[7] In Schmuck v. Reynolds-Schmuck (2000), 2000 CanLII 22323 (ON SC), 46 O.R. (3d) 702 (S.C.J.) at para. 25, Himel, J. emphasized the limited circumstances in which a reconsideration should occur, stating: “It is my view that a party who wishes a reconsideration would have to establish that the integrity of the litigation process is at risk unless it occurs, or that there is some principle of justice at stake that overrides the value of finality in litigation, or that some miscarriage of justice would occur if such a reconsideration did not take place.”
[8] In Gore Mutual Insurance Co. v. 1443249 Ontario Ltd., (2004) 2004 CanLII 27736 (ON SC), 70 O.R. (3d) 404 (“Gore”), at paras. 7-8, Karakatsanis, J. (as she then was) was prepared to re-open her decision in a situation where it was “obvious an error was made by all counsel and by the court.” It was a “case of a clear error.” It was “obvious” that the statutory provision now raised would have changed her determination and all counsel conceded that the provision previously relied upon had no application to the case. Karakatsanis, J. concluded at para. 8 that the “interests of justice are not served by requiring an appeal on a clear error of law that followed inaccurate and incomplete legal submissions of counsel.”
[9] In Scott, Pichelli & Easter Ltd. et al. v. Dupont Developments Ltd. et al., 2019 ONSC 6789, Sossin, J. (as he then was) noted at para. 13 that a “motion for reconsideration is more likely to be successful where the parties agree that an error has occurred, and less likely to be successful where the subject matter of the alleged error remains contested by the parties.”
As indicated, unless all parties consent to a reconsideration, and unless it appears obvious that an error was made, it is likely that a judge will decline a request to reconsider a decision and thereby a decision will stand unless appealed.
Summary Comment
Generally, when a court makes a decision, the decision becomes final and is subject to reversal or correction only via an appeal and only in some very limited circumstances may a judge be willing to reconsider a previously rendered decision.
NOTE: A significant amount of online searches for terms like “lawyers near me” or “best lawyer in” typically indicate a demand for prompt and skilled legal assistance rather than a particular professional designation. In Ontario, licensed paralegals are governed by the same Law Society that supervises lawyers and are permitted to represent clients in specified litigation issues. Advocacy, legal analysis, and procedural expertise are vital to this function. Gutoski Legal Services provides legal representation within its licensed framework, focusing on strategic positioning, evidence preparation, and effective advocacy with the goal of attaining swift and beneficial outcomes for clients.
