Yes, a 29-year-old lady can buy a resale HDB flat with her 88-year-old grandmother under the "Married couples and/or parent(s) with child(ren)" eligibility group. This group is suitable for family nucleus that are either Singapore Citizens (SC), Permanent Residents (PR) or a mix. For PR households, all applicants and core occupiers must have PR status for at least 3 years. The applicant’s spouse/parents/children can be considered as part of the family nucleus.
