A drop-down three car metal barn is a type of prefabricated steel structure that is designed to provide shelter and storage for three cars. It typically features a central unit with two lean-tos on either side, creating a spacious and versatile storage space. The "drop-down" aspect refers to the design of the barn, which allows for easy access and maneuverability of vehicles.

These metal barns are popular for their durability, low maintenance requirements, and cost-effectiveness compared to traditional wooden barns. They are often used for residential purposes, providing a secure and weather-resistant storage solution for multiple vehicles.