理论上比例可以很高EIP不适用公开出租市场，出租只有公民/PR份额的限制（单间房间无限制）。所以如果某栋楼的非印度屋主都出租给印度裔新加坡公民，那就是一个小印度了。 EIP的单栋楼印度族限制是15%，如果租一些给印度裔公民或者单间给印度人，20%还是有可能的。 The Ethnic Integration Policy (EIP) applies to the sale and purchase of all HDB flats, as well as HDB public rental flats. Tenants who rent HDB flats on the open market are not subject to the EIP, as their stays are typically temporary in nature, and do not affect the ethnic proportions in our public housing estates in the longer term. Instead, flat owners who rent out their flats to one or more non-citizen tenants are subject to the Non-Citizen Quota. The quota helps to maintain the Singaporean character of our HDB heartlands. All HDB owners are required to seek HDB’s approval and ensure that they meet the quota, before renting out their flats. https://www.mnd.gov.sg/newsroom/speeches/view/oral-answer-by-ministry-of-national-development-on-ethnic-integration-pol