It is best to contact HDB to receive an authority answer.
You may contact them via phone or email:
Sales/ Resale Customer Service Line: 1800-866-3066 (weekdays: 8:00am to 5:00pm, off-peak period: Tuesdays to Fridays, 8:00am to 10:00am)
Email: email@example.com or firstname.lastname@example.org
If you have questions about buying or selling an HDB flat, you can make an appointment with our Customer Relations Executives before you visit at HDB Hub, and save on waiting time
For enquiries about:
Buying or selling flats
Status of applications
All the best to your application.