In this article

Key Takeaways
Lockdown vs. Shelter in Place: Which One Applies
When to Initiate a Lockdown and Who Decides
What Employees and Visitors Do During a Lockdown
Lockdown Roles Your Plan Should Assign
Communication and Accessibility
Ending the Lockdown
Training and Drills
Where Security Staffing and Technology Fit
Folding Lockdown Into Your Emergency Action Plan
Planning Lockdown Coverage With GuardEX
FAQ
Sources
Recommended

An emergency lockdown is a protective action: you secure people inside locked rooms when a violent threat is inside or near your building, and you keep them there until an authorized person gives the all-clear. A workable procedure answers four questions in writing before anything happens. Who calls it? How does everyone hear it? What does each person do? How does it end? This guide walks New Jersey property managers and business owners through each one.

The steps below are general guidance drawn from federal and public-sector emergency planning documents. They are not a statement of New Jersey legal requirements for your building. Confirm local obligations with your municipal fire official, your local office of emergency management and your attorney or insurer.

Key Takeaways

A lockdown responds to a threat from a person, typically inside or near the building. Shelter in place responds to a hazard outside, such as severe weather or a chemical release.
Name the person who can declare a lockdown, name a backup, and decide in advance how the announcement reaches every area, including people with disabilities and non-English speakers.
Occupants lock and cover doors, turn off lights, silence phones, stay low and away from doors and windows, and stay put until an authorized all-clear.
Lockdown is not a stand-alone strategy. Plan for what happens if the threat reaches your room or if a safe exit becomes available.
Train and drill on a regular schedule, keep records, and invite local responders to take part.

Lockdown vs. Shelter in Place: Which One Applies

The two terms are often mixed up, and mixing them up in a real event costs time. The deciding factor is where the threat is and what kind it is.

The Interagency Security Committee’s guide describes a lockdown as generally imposed when an active shooter situation arises from events inside the building, while shelter in place is activated when an event occurs outside, such as severe weather, a hazardous materials release, crime nearby or a mass protest. CISA’s active assailant template adds that lockdown focuses on securing the premises during an immediate threat, while shelter in place focuses on remaining indoors, perhaps for an extended period, until you are told the situation is resolved.

	Lockdown	Shelter in place
Typical trigger	Armed or violent person inside or near the building	Severe weather, hazardous release, or an incident outside
Main goal	Put locked barriers between people and the threat	Keep people indoors and protected from an outside hazard
Doors	Locked, covered, often barricaded	Closed; building systems may be adjusted
Movement	Stay hidden, quiet and still	Staff may keep working in a safe interior area
Duration	Usually shorter, until responders clear the area	Can be extended

The two can also connect. The ISC’s earlier guide notes that a shelter-in-place event can turn into a lockdown as the situation changes. Your plan should say who makes that switch and how the new instruction is announced.

When to Initiate a Lockdown and Who Decides

Put the decision in the hands of a named role, not a committee. The Columbus, Ohio emergency operations plan template has the Incident Commander announce the lockdown by public address system, two-way radio, telephone or megaphone and designate employees to call 9-1-1.

FEMA’s IS-360 course material lists the situations that call for lockdown: sounds similar to gunshots inside or near the facility, any indication someone is brandishing or using a weapon, a report that a weapons assault is about to occur, or evacuation that does not look safe. Write these triggers into your plan in plain language, so a receptionist or site supervisor who sees one of them knows they can act without waiting for a more senior person.

For a multi-tenant building, settle this ahead of time:

Who in the building management can declare a lockdown for the whole property?
Can an individual tenant lock down only its own suite?
How does a tenant tell management, and how does management tell every tenant?
Who speaks to responders when they arrive?

Once police arrive, command of the scene changes. The Columbus template states that the law enforcement officer becomes the Incident Commander with jurisdiction over the scene. Your people shift from directing to supporting, and they follow responder instructions.

What Employees and Visitors Do During a Lockdown

Public agencies give very similar instructions. Condensed into a checklist you can post and train on:

Move to a securable room. CISA’s template tells employees to find a room with a lockable door or a designated safe room and lock, cover or block door windows and glass inserts.
Lock and barricade. Salt Lake County Emergency Management advises employees to close and lock the door and barricade it if that can be done quickly.
Darken the room. Turn off lights, cover automatic light sensors and close blinds.
Get out of sight. Stay low and away from doors and windows, behind cover where possible. Oregon State University’s procedure says to seek cover behind or under solid objects.
Stay silent. Silence phones and other devices.
Clear what you can’t secure. Seneca County, NY guidance tells people to clear hallways and bathrooms and to help people with access and functional needs if it is safe to do so.
Open the door for no one. Wait for an authorized all-clear.

People in open areas such as lobbies, hallways and stairwells are the hardest to account for. The ISC’s earlier guide tells occupants to get out of open areas and make offices look unoccupied by locking the door and turning out the lights. Tell front-desk staff and visitors’ hosts what to do with guests: bring them into the nearest securable room.

Lockdown is not the last step

The Columbus template cautions that lockdown is the initial physical response, meant to create a time barrier. It is not a stand-alone defense. Plans should include barricading the door and being ready to evacuate or take other action if circumstances change. Train people that the situation can change and that they will need to judge it. This is also why drills should include a discussion of exits and alternatives, not just locking doors.

Lockdown Roles Your Plan Should Assign

When a plan lists tasks without names, nobody does them. Assign each of these to a person and a backup, for each shift:

Decision-maker. Declares the lockdown and the all-clear.
Caller. Phones 9-1-1 and stays on the line if safe. The Columbus template assigns this to employees designated by the Incident Commander.
Announcer. Delivers the message through the channel you have chosen.
Area leads. Clear general areas, lock doors, move large objects in front of doors and take attendance, which is the Facility Safety Team’s job in the same template.
Responder liaison. Meets police outside, with a floor plan, a key or access credential, and a list of who may be where.
Outside coordinator. The Columbus template also notifies employees who are outside to move to an off-site assembly area. Name that location in advance.

The NYS Fire Code’s lockdown planning elements, as summarized in CISA’s guide, include emergency reporting, accountability, an all-clear signal, two-way communication, training frequency and occupant notification that is separate from the fire alarm. That last point matters: a lockdown message should never sound like a fire alarm, since a fire alarm sends people into hallways.

Communication and Accessibility

Decide how the message goes out, and then test every channel. A public address system works only where speakers reach, so check stairwells, restrooms, loading docks and parking areas. Radios, text alerts, desk phone paging and door-mounted indicator lights each cover gaps the others miss.

Staff member checks radio coverage beneath stairwell speaker

Set one clear phrase and use it every time. A short, unambiguous instruction beats a technical code that visitors and new hires have never heard.

Accessibility belongs in the plan from the start. CISA’s template states that lockdown and shelter-in-place directives should be receivable by non-English-speaking personnel, people with disabilities and people with access and functional needs. It also says procedures should account for people who need regular medication, use medical equipment or need personal assistance. In practice:

Pair employees who need help with a named colleague on each shift.
Use visual alerts such as strobes or text messages alongside audio.
Offer the instructions in the languages your workforce speaks.
Identify rooms that can accommodate mobility devices and medical equipment.
Include visitors, contractors and delivery drivers, who do not know your building.

Ending the Lockdown

The end of a lockdown is as risky as the start, because people want to leave. The rule is simple: stay until an authorized person says it is over. The Columbus template says employees may not leave the safe area until the Incident Commander gives the all-clear, unless a life-threatening situation exists and a safe exit is available.

Decide how the all-clear will be verified. Oregon State’s procedure lists several channels, including an alert system, a hallway announcement, a phone notification or the university website, and tells occupants not to leave until allowed. Your plan should name its own channels and warn staff that anyone knocking or calling out at the door could be a threat. Only the agreed method counts.

After the all-clear, plan for accountability (a headcount against your roster), a place for people to gather, support for those affected, and a written after-action review.

Training and Drills

A plan that has never been practiced will not work under stress. Ready.gov says everyone needs training in protective actions such as evacuation, shelter, shelter in place and lockdown. It recommends regular drills and keeping records of the scope, participants, instructor and duration.

CISA adds that training, exercises and drills build the muscle memory needed for an effective response, and that organizations should include local or regional emergency responders so they become familiar with the facility.

A practical annual cycle:

New-hire briefing. Ten minutes on triggers, rooms and the lockdown phrase.
Talk-through. Walk each team through its own area and identify its securable room.
Announced drill. Run the procedure with warning, and check that every channel reaches every area.
Unannounced practice. Vary the time, shift and location of the declared threat.
Debrief. Record what failed: doors that don’t lock from inside, speakers that don’t reach, missing rosters.

The legal question of how often your type of building must drill varies. Ask your local fire official or OEM about it. Schools, healthcare and other regulated settings can have separate requirements.

Where Security Staffing and Technology Fit

A lockdown procedure depends on the physical site. Doors that lock from the inside, controlled entrances and visibility into the property give your plan more to work with. Planning these elements is where a security provider can help alongside your emergency planning.

Some practical connections:

Doors and locks. Rooms that can be secured quickly from the inside make lockdown steps realistic. Our guide to commercial door security for NJ properties covers common door and hardware issues.
Access control. Credentialed entry limits who gets in and records who is in the building, which helps with accountability. See our access control systems.
Video and remote monitoring. Cameras and remote security monitoring can help staff and responders understand what is happening on a property, depending on how the system is designed and staffed.
On-site officers. Guards at an entrance or lobby can be assigned lockdown tasks in the written plan: making the announcement, locking an entrance, meeting responders. These tasks must be defined and trained before the day they are needed.

Specific settings have their own layouts and risks. If you manage one of these, see our pages on healthcare facility security, distribution center security or security guards for manufacturing plants.

No security measure can promise to prevent an incident. The point of layered planning is to give people more time, better information and clearer roles.

Folding Lockdown Into Your Emergency Action Plan

Lockdown should not live in a separate binder. It belongs in the same emergency action plan as evacuation, fire, severe weather and medical emergencies, with consistent terminology and the same roles where possible. The Occupant Emergency Programs guide treats active shooter scenarios as one of the factors that contribute to a decision to activate the plan alongside other immediate threats to life or property.

Check how your alarm systems interact with your procedures. A fire alarm that sounds during a lockdown can pull people out of safe rooms, so your building’s alarm design and notification zones matter. A discussion of fire alarm zoning design helps clarify how zones are organized, though the codes and authorities in New Jersey are your own. Your fire official and licensed design professional can confirm what applies to your building.

Then conduct a short annual review:

Update the roster of decision-makers and backups.
Re-check which rooms lock from the inside.
Re-test every notification channel.
Revise for any renovations, new tenants, or staffing changes.
Share the updated plan with local responders.

Planning Lockdown Coverage With GuardEX

We are a locally owned New Jersey security company. We provide armed and unarmed security guards, mobile patrols, remote monitoring, access control and video security, and we build security plans around each property’s specific risks and operations. If you are writing or revising lockdown procedures, we can discuss how guard coverage, entrances and technology at your site fit into that plan.

To talk through your property, see our security guard services or contact us through securityguardex.com.

FAQ

What is the difference between lockdown and shelter in place?

A lockdown responds to a person-based threat, usually an armed or violent individual inside or near the building. Shelter in place responds to an outside hazard such as severe weather or a chemical release. Lockdown means locked doors, hiding and silence, while shelter in place means staying indoors, sometimes for a long time.

Who should call a business lockdown?

A named decision-maker, with a trained backup, should call it. In the Columbus template, the Incident Commander announces it and designates employees to call 9-1-1. Write the triggers into your plan so staff can act on them without delay.

Do I have to run lockdown drills at my New Jersey business?

Requirements depend on your type of facility and your local authorities, so confirm with your municipal fire official or local office of emergency management. As general guidance, Ready.gov recommends regular lockdown drills and keeping records of each one.

When can people leave a locked-down room?

Only when an authorized person gives the all-clear through the channel your plan names. The exception in the Columbus template is a life-threatening situation where a safe exit is available. Don’t open the door for knocking or voices alone.

How do I include employees with disabilities in a lockdown plan?

Use both audio and visual alerts, assign a buddy to each person who needs help, and identify rooms that suit mobility devices and medical equipment. CISA’s template also asks that directives be receivable by non-English-speaking staff and that procedures account for medication and personal assistance needs.

Emergency Lockdown Procedures for New Jersey Businesses