Source: HDB Website
Home owners who wish to install closed-circuit television (CCTV) cameras in their flats must adhere to the following guidelines:
CCTV should not face the door or windows of another flat, which would cause privacy concerns for neighbours.
CCTV must not be installed at areas where it can be potentially become killer litter, eg. on the building facade.
Smart doorbells and smart door viewers, installed in the homes are allowed.
Approval from HDB is not required if the device is installed within the flat. However, home owners who wish to install CCTV cameras or CCTV-like devices outside of their flat (i.e. common corridor), should approach the Town Council managing their area for advice.