Bartley v Morgan
Attorneys and Parties
Brief Summary
Real property/partition; preclusion (res judicata) and adverse possession between cotenants under the Real Property Actions and Proceedings Law (RPAPL) 541 [adverse possession between cotenants; requires ouster].
Supreme Court, Kings County denied Bartley’s motion for summary judgment on adverse possession and granted Morgan’s cross-motion dismissing the complaint as barred by res judicata.
Nothing; the order was affirmed.
The majority held that Bartley’s adverse possession claim arose from the same transaction as the prior partition action and could have been asserted there; the prior summary judgment order in the partition action had preclusive effect, and a new action seeking adverse possession would impair rights established in that action. A partial dissent argued res judicata was inapplicable because there had been no final determination or interlocutory judgment under RPAPL 915 [requires an interlocutory judgment determining parties’ rights, shares, interests and directing sale or partition].
Background
Siblings Carol Bartley and Winston Morgan acquired a Brooklyn property as tenants in common by deed dated March 12, 1993. Morgan contributed $23,500 toward the $235,000 purchase price. Bartley moved in, paid off the mortgage, lived there for over 30 years, and collected rental income. In 2019, Morgan brought a partition and sale action and sought an accounting. The Supreme Court granted Morgan partial summary judgment by appointing a referee to determine the parties’ rights, shares, and interests and whether a sale was necessary. Bartley moved to amend to assert adverse possession under RPAPL 541 [adverse possession between cotenants; requires ouster], but the motion was denied as untimely; her appeals from related orders were deemed dismissed for failure to perfect. In 2022, she commenced a new action seeking a declaration of sole ownership by adverse possession, moved for summary judgment, and Morgan cross-moved to dismiss on res judicata grounds.
Lower Court Decision
By order dated November 9, 2023, the Supreme Court, Kings County denied Bartley’s summary judgment motion and granted Morgan’s cross-motion, holding that the adverse possession claim was barred by res judicata because it could have been raised in the earlier partition action and a favorable judgment for Bartley would impair rights established there.
Appellate Division Reversal
Affirmed. The majority concluded the new adverse possession action is barred under New York’s transactional approach to res judicata. Justice Taylor concurred in denying Bartley’s summary judgment motion but dissented from granting Morgan’s cross-motion, reasoning that res judicata does not apply absent a final determination or the interlocutory judgment mandated by RPAPL 915 [requires an interlocutory judgment determining parties’ rights, shares, interests and directing sale or partition], and warning of potential inequity given unresolved partition equities.
Legal Significance
Reinforces New York’s transactional approach to res judicata: claims arising from the same transaction that could have been raised earlier are precluded, even if framed under different theories or seeking different relief, where a prior order on the merits would be impaired. In the partition context, litigants must timely assert adverse possession (including under RPAPL 541 [adverse possession between cotenants; requires ouster]) within the partition action or risk preclusion. The dissent highlights tension between preclusion principles and the requirement for an interlocutory judgment under RPAPL 915 in partition cases.
In co-tenant property disputes, a party must raise adverse possession in the first-filed partition action or risk being barred by res judicata; New York’s transactional approach can preclude later suits even before a final partition judgment, though a dissent questioned applying preclusion absent the RPAPL 915 interlocutory judgment.

