A7.3 Securing offices, rooms and facilities

ISO 27001 A7.3 Securing offices, rooms and facilities control focuses on protecting areas where sensitive information is stored, processed, or discussed—like server rooms, meeting rooms, and offices. It ensures these spaces are physically secured to prevent unauthorized access, damage, or interference with the organization’s information assets.

Think of it this way: Even with the best firewalls and encryption in place, if someone walks into your server room or digs through a desk drawer, your information is still at risk.

Implementation Guidance #

1. Secure Design of Physical Spaces

• Position sensitive facilities like server rooms away from public access points (e.g., reception).
• Use walls that extend to the ceiling—no gaps or removable tiles above.
• Ensure doors are solid-core or metal, with secure locking mechanisms.

2. Locks and Physical Barriers

• Install locks on all doors leading to sensitive offices or facilities.
• Use coded locks, key cards, or biometric readers depending on the risk level.
• For added security, apply dual-access control (e.g., badge + PIN) in high-risk zones.

3. Surveillance and Monitoring

• Equip rooms and sensitive facilities with CCTV coverage.
• Place cameras at entrances, hallways, and key interior points.
• Keep recording logs as per your retention policy.

4. Securing Equipment Within Rooms

• Secure servers, switches, and backup devices in locked racks or cabinets.
• Use cable locks or anchors for workstations and laptops in public/shared areas.
• Implement screen privacy filters for desks exposed to visitor views.

5. Environmental Controls

• Equip rooms with smoke detectors, fire suppression systems, and temperature control.
• Use UPS (Uninterruptible Power Supply) and surge protectors for critical equipment.
• Keep water sources away from data rooms (no plumbing overhead or within walls).

Best Practices #

• Keep offices locked when not in use—even for short breaks.
• Do not leave confidential papers, USBs, or devices unattended on desks.
• Place privacy films on glass walls/windows of sensitive rooms.
• Conduct random physical checks or security sweeps, especially after hours.
• Mark zones with signs like “Authorized Personnel Only.”

Audit Readiness #

What to Maintain:

• Physical security plan for all facilities
• List of all secure rooms with access control levels
• Floor maps showing controlled and restricted zones
• CCTV maintenance and footage logs

Records of door lock installation and upgrades

What Auditors May Ask:

• Are physical security controls consistently applied?
• How are secure rooms monitored and maintained?
• Who has access to these rooms, and is it reviewed regularly?
• Are staff trained on securing their work areas?

Common Mistakes to Avoid #

• Using general office keys for secure rooms
• Leaving server rooms unlocked or propped open
• Allowing unauthorized cleaning staff or vendors without supervision
• Not updating access after employee role or team changes

ISO 27001 Control Attributes #