Mannillo v. Gorski
Facts
Defendant and her husband entered possession of their lot in 1946 under an agreement to purchase, later receiving a deed in 1952. In 1946 and again in 1953, defendant made changes to her house and steps, and defendant admitted that the concrete steps and walk encroached 15 inches onto plaintiffs' adjoining lot. The trial court found that the encroachment had existed for more than 20 years and that possession was exclusive, continuous, uninterrupted, and against the true owner's rights, but denied adverse possession because the encroachment resulted from mistake rather than a knowing intent to invade another's land. The visibility and notoriety of this small encroachment were also in dispute.
Issue
Whether possession under a mistaken belief of ownership can satisfy the hostility requirement for adverse possession. Also, whether a 15-inch boundary encroachment is sufficiently open and notorious to support adverse possession without proof that the true owner actually knew of it.
Rule
For adverse possession, hostility does not require a knowing or intentional wrongful taking; possession under a mistaken claim of title may be hostile if it is exclusive, continuous, uninterrupted, visible, and notorious for the statutory period. But no presumption of knowledge arises from a minor encroachment along a common boundary; in such cases, possession is open and notorious only if the true owner had actual knowledge of the encroachment. Where an innocent encroacher has made an extensive improvement that cannot be removed without great expense or hardship, equity may require the true owner to convey the occupied land for its fair value if appropriate and if no serious damage would be done to the remainder.
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If Leo sues to recover the strip, which is the strongest argument for Dana's adverse-possession claim on the hostility element?