Tailgating Security: How to Prevent Unauthorized Entry

What Is Tailgating Security?

Tailgating security refers to a physical breach where an unauthorized person follows an authorized individual through a controlled access point, like your front door or garage. It's also called "piggybacking." Instead of picking a lock or breaking a window, the intruder simply walks in right behind you.

This is a direct threat to home and building security. Why? Because it bypasses locks, alarms, and most traditional entry barriers. Someone just has to wait for you to open the door, then slip through before it closes.

Why Tailgating Happens at Home

Tailgating isn't just a corporate office problem anymore. Residential properties face this risk too, especially in multi-unit buildings, gated communities, or homes with delivery services and service workers.

The attacker doesn't need technical skills or tools. They just need opportunity and a little nerve. That's what makes it so dangerous.

Related: Safe Strategy for Home Security: What Works & What Doesn't

Step 1: Secure Your Entry Points with Physical Barriers

Start with the basics. Your doors and windows are your first defense line against tailgating.

• Install deadbolts on all exterior doors. Single-cylinder deadbolts on front and back entries are non-negotiable. Double-cylinder deadbolts (requiring a key from both sides) add extra protection, though check local fire codes first.
• Reinforce door frames. A solid door is useless if the frame splinters open. Use strike plates with 3-inch screws that anchor into the wall studs.
• Close and lock doors immediately after entering. Don't prop them open, even for a few seconds. Make it a habit.
• Install window locks. Tailgating isn't just about doors. Make sure all ground-level and accessible windows lock securely.

Step 2: Install Video Monitoring at Entry Points

A visible camera acts as a deterrent. An active surveillance system gives you proof of a breach and helps law enforcement.

Position a video doorbell or outdoor camera at your primary entry to monitor who approaches and who enters. Look for systems with professional-grade security camera options that offer night vision, motion detection, and remote viewing so you can watch in real time from your phone.

High-resolution cameras with built-in audio are especially useful. If someone tailgates behind a delivery driver, you'll see and hear it happen.

Step 3: Make Your Home Look Occupied

Burglars and intruders target homes that appear empty. If your house looks like no one's home, it becomes a softer target for tailgating or forced entry.

• Use smart lights with timers. Set interior lights to turn on and off at random intervals while you're away. This mimics normal activity.
• Keep cars in the garage or driveway. An empty driveway signals an empty home.
• Don't announce your absence on social media. Vacation posts, check-ins at airports, and "away for the weekend" updates are basically invitations.
• Ask trusted neighbors or friends to check on your property. A car visiting occasionally or a neighbor walking through your yard creates the appearance of activity.

Step 4: Create Security Awareness in Your Household

Physical barriers only work if people use them correctly. Educate everyone in your home on tailgating risks and prevention.

• Never hold the door open for strangers, no matter how harmless they seem.
• Don't let delivery drivers or service workers into your home unless you've verified their identity and company.
• Check security camera footage before opening doors to unexpected visitors.
• Teach children not to let anyone into the home while they're present.

A single lapse in behavior can undo weeks of security preparation. Safes and Security Solutions emphasizes that awareness is as critical as hardware.

Step 5: Upgrade to Smart Access Control

Modern homes can integrate smart locks, keypad entry systems, and biometric readers. These reduce reliance on physical keys that can be lost or stolen.

• Smart door locks with codes. Change codes regularly and share with trusted people only. You can revoke access instantly.
• Two-factor entry. Some systems require both a code and a remote unlock signal. An intruder can't tailgate if they need two forms of authentication.
• Activity logs. Smart locks record every entry, showing you who came in and when. Spot unauthorized entries immediately.

Step 6: Secure Your Wi-Fi Network

If your smart home devices run on Wi-Fi, a weak network invites digital break-ins that can compromise your physical security.

• Use a strong, unique Wi-Fi password. Change the default router name and password.
• Enable WPA3 encryption or at minimum WPA2.
• Disable guest networks if you don't actively use them.
• Update router firmware regularly.

A hacked smart lock is as bad as an unlocked door. Protect the digital side of your security system with the same care you protect the physical.

Step 7: Combine Layers for Maximum Protection

The most effective tailgating security strategy combines multiple layers. A thief or intruder should face multiple obstacles, not just one.

Related: Safe Security: 7 Essential Home Protection Layers

Related: How to Protect Home Security: 5 Essential Layers

Related: Safe and Sound Security: Complete Home Protection

Here's a practical example of layered protection:

• Solid deadbolted door (physical barrier)
• Video doorbell monitoring entry (detection)
• Smart lock with access codes (control)
• Interior smart lights on timers (deterrent)
• Household awareness training (human layer)

When you combine these elements, tailgating becomes much harder. An intruder would need to defeat multiple systems, and each one leaves evidence. Most will move on to easier targets.

That's the principle behind comprehensive security solutions: layers of protection working together.

Tailgating Security for Multi-Unit Buildings

If you live in an apartment, condo, or townhouse, tailgating risk increases because multiple residents share entry points.

• Don't hold doors for unfamiliar people. Even if they seem to belong, verify first.
• Report suspicious activity to management. If you see someone tailgating behind residents, notify your building security team.
• Use your unit door lock even when home. Don't rely solely on the building's front door lock.
• Advocate for building upgrades. Push management to install key card systems, video intercoms, or motion-activated lighting in common areas.

Related Questions About Tailgating Security

Can tailgating happen in a home with a security system?

Yes. A traditional alarm system with door sensors will detect the breach, but only after entry. By then, the intruder is already inside. That's why physical barriers and video monitoring are so important—they prevent or deter entry before it happens.

Is a video doorbell enough to stop tailgating?

A doorbell camera is a strong deterrent and excellent for evidence collection, but it's not a complete solution by itself. Criminals know cameras record after the fact. Combine it with visible deadbolts, smart locks, and good lighting to create a harder target that discourages attempts altogether.

What should I do if I see someone tailgating into my building?

Don't confront them. Report it immediately to your building management or local police. Provide any video footage from your doorbell camera. Document the time, date, and description of the person. Law enforcement can follow up and investigate.

How often should I review security camera footage?

Set up motion alerts on your doorbell or security camera so you're notified instantly when someone approaches. You don't need to watch footage 24/7, but you should check it regularly—at least a few times per week. Many modern systems offer cloud storage and searchable archives, making it easy to spot patterns or suspicious activity over time.

Bottom line: Tailgating security isn't complicated, but it requires consistent effort and multiple layers. Lock your doors, monitor your entries with video, control access with smart systems, and stay aware. A thoughtful, multi-layered approach makes your home a much harder target and gives you peace of mind.