According to my search, the general HDB hotline is 1800-225-5432 . It is just a Department Business Service Line that operates on weekdays from 8:00 AM to five:00 PM.Additionally, you'll find other Speak to figures for distinct companies:* HDB Key Line: 6490-1111 (for normal enquiries, weekdays eight:30 AM - 5:00 PM)* Important Maintenance Serv