The document provides details about the planning process for different housing units in India. It begins with an introduction to architectural systems and the design process. It then outlines the standard area norms set by the Gujarat government for economically weaker section (EWS), lower income group (LIG), middle income group (MIG), and higher income group (HIG) housing. The document also provides examples of unit designs for EWS and LIG housing in Surat, transit housing in Mumbai, and an HIG unit in Gurgaon. It concludes with details about designing a luxury apartment. The document thus covers the entire planning and design process for various types of housing units in India according to income levels.