In an effort to promote deconcentration and flexibility, the non-profit sector has been called to play a greater role in the production and management of federally subsidised rental housing in the United States. This paper explores the interjurisdictional distribution of subsidised units in the Greater Boston area and investigates how it is shaped by housing non-profits, controlling for demographic, fiscal, economic and regulatory characteristics. Findings suggest that housing non-profits contribute positively to the proportion of subsidised units in a given municipality. Yet, the geographical concentration of such agencies in poorer and heavily subsidised jurisdictions, due in part to restrictive zoning regulations, prevents them from promoting geographical mobility among assisted households.