This working paper presents analysis of custom tabulations of the 2006-2010 American Community Survey (ACS), known as the "CHAS data." The CHAS data combine ACS microdata with HUD adjusted median family incomes (HAMFI) to create estimates of the number of households that would qualify for HUD assistance. Using these data, the author estimates the number of rental units and ownership units that would be available to prototypical households at specified income levels.