This document summarizes a research project that aims to create age-friendly housing and neighborhood designs through a participatory design process with older adults. The research was prompted by an aging population that is living longer at home and facing mobility issues. The project will develop prototype designs in three Sheffield neighborhoods with input from older adults, stakeholders, and the local council. It will evaluate how design can facilitate independence, activity, and social interaction for older residents. The designs will consider connections between indoor and outdoor spaces. The research team is cross-disciplinary and the project runs from 2013-2016, with outputs including revised design briefs, detailed plans, and dissemination of findings.