Massive privatizations of housing in Europe and Central Asia transition countries have significantly reduced rental tenure choice, threatening to impede residential mobility. Policymakers are intensifying their search for adequate policy responses aimed at broadening tenure choice for more household categories through effective rental housing alternatives in the social and private sectors. While the social alternative requires substantial and well-balanced subsidies, the private alternative will not grow unless rent, management, and tax reforms are boldly implemented and housing privatization truly completed.