HDB fire-rated doors are mandatory for flats where the main entrance is located within three meters of a lift lobby or staircase, or if the original flat was already equipped with one. These doors, which must have a minimum fire resistance of 30 minutes, are designed to contain fire and smoke, providing a crucial window for escape. They must also have an SCDF certification label and a self-closing mechanism. Homeowners must engage an HDB-licensed contractor to ensure proper installation and read more to obtain the necessary permits. The price of these doors varies, with suppliers like Ho Ho and Laminatedoor offering options starting from S$800, and prices for custom laminate designs often ranging from S$1,188 to S$1,588, with some promotions bringing the cost down. The price typically includes the door, hardware, and installation with a valid fire-rated certificate.