Design of a garden under a building

Quick answer：

The design of a garden under a building, often referred to as a 'roof garden' or 'green roof,' involves creating a landscaped area on the roof or at the level below the building. This type of garden can improve urban biodiversity, reduce energy consumption, and provide a green space for residents. Key considerations include waterproofing the roof, ensuring proper drainage, choosing appropriate plants that can withstand the environment, and incorporating pathways and seating areas.