以下抄自新加坡政府有关私人住宅的网站
http://www.ura.gov.sg/lad/HBG/basicCheck.htm#eligibilityCheck Your Eligibility to Buy
Before you consider buying your dream home, check whether you are eligible to buy especially if you own a HDB flat and/or are a non-Singapore citizen (including Singapore Permanent Resident).
If you own a HDB flat, you may wish to check whether you have fulfilled the minimum occupation period required for your HDB flat before you can purchase private residential properties. For more information, visit the HDB website.
If you are a non-Singapore citizen (including Singapore Permanent Residents), you have to obtain approval from the Controller of Residential Property, Singapore Land Authority, before you may buy landed houses. For more information, visit the SLA website.
外国人包括永久居民在购买有地住宅时,要预先得到政府批准。
可以从以下新加坡政府网站下载外国人购买有地住宅的申请表格。
http://www.sla.gov.sg/htm/ser/ser0306.htm 所以不能从一个人购买了有地住宅,就断定他已经加入新加坡籍。那个记者有点误导读者。