Same-sex couples are found to be more likely to own (rather than rent) their homes than are unmarried, opposite-sex couples and less likely than married couples. Age explains the largest share of the homeownership gaps. Household income, center city residence, and the presence of children are also important factors. While almost two-thirds of the gap in homeownership between married and same-sex couples can be explained by differences in characteristics, about one-third of the gap can be attributed to differences in behavior and treatment, including discrimination on the basis of sexual orientation and marital status. About half of the gap between unmarried opposite-sex couples and same-sex couples can be explained by differences in characteristics, with the remaining half attributable to differences in behavior and treatment.