HFE HDB stands for HDB Flat Eligibility, which is a letter provided by the Housing and Development Board (HDB) in Singapore to provide flat buyers with a holistic understanding and assessment of their housing and financing options. The HFE letter replaced the HDB Loan Eligibility (HLE) letter on May 9, 2023, and is an all-in-one document that summarizes everything a buyer needs to know about their eligibility to buy a new or resale flat, get housing grants, and take an HDB housing loan. The HFE letter streamlines various HDB flat purchase steps such as eligibility assessments and housing grants, making the flat buying process more convenient for buyers. The HFE letter is valid for six months and can be applied for at the start of the house hunting journey.