You can apply for a flat if you, your spouse or any of the essential occupiers listed in the application is an existing owner or ex-owner of a:
flat bought directly from HDB,
resale flat bought under the CPF Housing Grant Scheme,
DBSS flat bought from the developer, or
EC bought from the developer.
This is on condition that a 5-year period (excluding any period of subletting of the whole flat) has lapsed from the *date of taking possession of the flat to the date of application for a flat.
* The date of taking possession refers to:
The date of key collection, for flats that are bought directly from HDB
The date of resale completion, for purchase of resale flats from the open market bought with the CPF Housing Grant
The date of transfer at market value of the flat bought with CPF Housing Grant
The date of key collection for Executive Condominium/DBSS flats bought from the developer, whichever is applicable.