HDB的每一个block只允许出租百分之十一的units给除了公民和马来西亚PR的其他PR和外国人,每个小区是不超过百分之八。见链接:http://www.straitstimes.com/singapore/quota-for-hdb-subletting-to-foreigners-8-cent-for-neighbourhoods-11-for-blocks