Detached house with sunken courtyard illustration

Quick answer：

A sunken courtyard in a detached house refers to a courtyard that is located below the ground level of the house. This design feature can create a unique and private outdoor space that is sheltered from the main living areas. The illustration of such a design would typically show the layout and architectural details of the sunken courtyard, including any landscaping elements, pathways, or structural features that define the space.