Each level measures 15"H 19 3/4"W 22 3/4"L This noteworthy bird house will have people admiring it from close and afar. Each level has six compartments with a three level or eighteen compartment maximum. The top unscrews for easy cleaning, and a central venting system provides air flow to each compartment. Instructions include a steel pole that hinges in the center allowing one person to raise and lower.