https://www.hdb.gov.sg/cs/infoweb/residential/buying-a-flat/resale/eligibility-
官网里写了各种可买 resale HDB 的Scheme
挨个点点进去看总能找到一个方案
Buy an HDB resale flat with your family. For example, with your wife and children, parents and siblings, or children (if you are widowed or divorced).
Buy an HDB resale flat with your fiancé or fiancée.
Buy an HDB resale flat as a single. You must be at least 35 years old if you are unmarried or divorced, and at least 21 years old if you are widowed or an orphan.
2 to 4 singles can jointly buy an HDB resale flat. If you are unmarried or divorced, you must be at least 35 years old. If you are widowed or an orphan, you must be at least 21 years old.
If your spouse is a not an SC or SPR, you can buy an HDB resale flat under the Non-Citizen Spouse Scheme.
If you are a single SC and your family members (e.g. parents) are not SCs or SPRs, you can buy an HDB resale flat under the Non-Citizen Family Scheme.
If you and your sibling(s) are orphans and single (i.e. unmarried, divorced, or widowed), you can jointly buy an HDB resale flat.
Subject to approval, the Conversion Scheme allows you and your family to buy adjoining flats that are 3-room or smaller and convert them into 1 unit.