Supreme Court reversed lower court, ruling a 4-unit duplex falls within the legal definition of single-family housing.

The Supreme Court of Poland revoked the decision of the Administrative Court of Appeal and remanded the case for reconsideration. The lower court had rejected the applicant's request to set building conditions because it deemed a four-unit duplex not to be single-family housing under the local plan. The Supreme Court held that the statutory definition of single-family housing explicitly includes residential buildings containing no more than four apartments, thereby validating the applicant's interpretation.