In this paper we deliver first causal evidence on the relationship between immigrant host country language proficiency and homeownership. Using an instrumental variable strategy, we find a substantial positive impact of language skills on the propensity to own a home and the quality of housing. While this effect is mediated by education and household income, our estimates also speak in favor of a direct effect. Our results highlight the importance of host-country-specific human capital and, in particular, language proficiency for socio-economic assimilation.