To date, the US housing system has created a chronic affordability gap and persistently inequitable and unhealthy living conditions. Law plays an important role in shaping that system, but there is too much unknown about the impact of housing laws and policies on health and health equity. This report series by the P4A Research Hub at the Center for Public Health Law Research at Temple University’s Beasley School of Law aims to highlight these gaps, and to suggest areas for research and action needed to produce healthier communities.