Tianjin sunken courtyard design refers to the architectural design of sunken courtyards in Tianjin, China. Sunken courtyards are a traditional Chinese architectural feature where a courtyard is lower in elevation than the surrounding buildings. This design can provide privacy, reduce noise, and create a serene environment. It involves considerations such as landscape, water management, and building layout. The design of Tianjin sunken courtyards often reflects the local historical and cultural context.