This document discusses how housing design can contribute to building healthy places and communities. It provides examples of retrofitting existing homes in New Zealand to improve insulation, which led to reductions in reported health issues. A second case study examines a purpose-built housing development in the Netherlands called Hogeweyk that is designed specifically for people with dementia. Hogeweyk incorporates design elements like outdoor greenspaces and opportunities for social interaction to stimulate residents and slow cognitive decline. The document concludes that links between housing and health have long been known, and both retrofitting existing homes and new developments present opportunities to positively impact public health through improved design.