Abstract
This study aims at examining a better supply, planning and management system of common spaces at detached houses area. In particular, the study focuses on clarifying the difference of level of living environment and community development by type of plan, and type of ownership and management regarding common space. Major usages of the common space are roads and parks & green in the detached houses areas, and there are various layout plans on common space. 60% of the common space is under joint ownership, however either joint ownership or not, residents tends to form homeowners association and carry out joint management and maintenance.