What is the importance of key control, and what practices support security in a multi-family building?

• A. Sharing keys among staff for convenience.
• B. Using a master key system with no audit trail.
• C. Keeping no records of keys.
• D. Prevent unauthorized access; maintain master keys, key audit trail, rekey after vacancy, use access control systems.

Answer: (D)

Key control is about ensuring that only authorized people can enter the building and that every access is tracked. In a multi-family setting, this protects residents, staff, and property and supports safety and accountability.

The best practice combines several elements. Preventing unauthorized access reduces the risk of break-ins, vandalism, and safety incidents. Maintaining master keys under strict control limits who can hold the most powerful keys and how they’re stored, so access is tightly managed rather than wide and informal. A key audit trail records who was issued keys, who used them, and when—creating accountability and a trail to follow if a key goes missing. Rekeying after vacancy closes potential security gaps by ensuring former occupants or former staff no longer have valid access. Using access control systems, such as electronic locks or fobs, adds centralized management, time-based access, and built-in logs, making it easier to revoke access quickly and reduce the number of physical keys in circulation.

Why the other approaches don’t fit: sharing keys among staff for convenience undermines accountability and makes it hard to know who truly has access. a master key system without an audit trail leaves no record of who used keys or when, increasing risk. and keeping no records of keys eliminates traceability and makes it impossible to resecure the building effectively if a key is lost or an employee vacancy occurs.