Adverse possession is a legal theory that allows one to assert a claim to property that is not his by taking, using and maintaining that property as if it were his. An adverse possession claim is typically asserted where one property owner makes use of part of a neighbor’s property, for example a portion of a driveway, for an extended period and then claims ownership to that part of the driveway when challenged by the true owner. To make out a claim for adverse possession, the adverse possessor must establish that he has been using that property, exclusively and openly, as if it were his, for a period of 10 years. In addition, in most situations, the adverse possessor must also improve or enclose the property. The idea is for the possessor to act as if he owns the property, ostensibly putting the true owner on notice that his property is being used by another.
Until recently, there was a question as to whether the possessor had to know that the property that he was using was not his to satisfy the requirement that it be used openly, as if he owned it. One appellate court held that a possessor’s knowledge that the property belonged to someone else would defeat an adverse possession claim because the possessor’s use could never be considered use as an owner. A different appellate court, however, held that the possessor’s knowledge is irrelevant to the determination of adverse possession. So long as the possessor used the property as if he owned it, his knowledge, intent, and good faith, are immaterial. This theory allows an adverse possession claim even if the possessor knew that the property which he used and now claims to own by adverse possession belonged to his neighbor during the time that he used it. Essentially, this allows one to use his neighbor’s backyard, in an open and notorious manner and years later claim ownership to that backyard, notwithstanding that the true owner was known to the possessor the entire time.
Recently, the question of the possessor’s knowledge reached New York’s highest court, the Court of Appeals. In Walling v. Przybylo, the court decided that so long as the possessor used the property as if it were his, to the exclusion of the true owner and without the owner’s objection, the possessor’s knowledge that the property was never his would not defeat the adverse possession claim. This decision surprised many as it seems to condone ownership by trespass.