Private condominiums have no HDB restrictions and can be purchased by both locals and foreigners at any time. Executive condominiums (ECs), however, begin as subsidized housing with a 5-year Minimum Occupation Period, after which they become partially privatized. They become fully privatized only after 10 years, and that is why foreigners can only buy ECs that have passed the 10-year mark.
Nationals or Permanent Residents of Iceland, Liechtenstein, Norway, Switzerland, and the United States are treated as Singapore Citizens for stamp duty purposes and are therefore exempt from the 60% Additional Buyer’s Stamp Duty on their first property purchase.