This document discusses social infrastructure planning for urban areas. It identifies key types of social infrastructure that are important for quality of life, including education, healthcare, socio-cultural, recreational, sports, and distribution services facilities. It discusses factors for determining how much social infrastructure is needed like population characteristics. It also outlines principles for deciding what level of social infrastructure different sized communities need and funding sources. The document stresses the importance of inclusive planning so social infrastructure is accessible by walking and serves mixed uses.