Apartment buildings are multi-unit residential structures that provide living spaces for multiple families or individuals. They can vary in size, from small buildings with just a few units to large complexes with hundreds of apartments. Each unit typically includes essential amenities such as a kitchen, bathroom, and living area, allowing residents to live independently. These buildings often feature shared facilities, such as laundry rooms, parking spaces, and recreational areas. Apartment buildings are commonly found in urban areas, where space is limited, and they offer a practical solution for housing a growing population. They can be owned by private landlords or managed by property management companies.