Locked Inside Your NYC Apartment: What to Do Right Now

If your apartment door will not open from the inside, stop pulling on it. The usual causes are a latch jammed against a misaligned strike, a double-cylinder deadbolt with no key within reach, a jimmy-proof rim lock whose bolts have bound, a broken interior thumb turn or handle, or a key snapped off in the cylinder. If there is any smoke, fire, gas smell, or a medical emergency behind that door, call 911 first. If nobody is in danger, call a locksmith, because an apartment door can almost always be opened from the hallway side without destroying it.

Being stuck on the inside feels worse than a normal lockout and it is handled differently. In a lockout you are in the hallway with the hardware in front of you. Here the hardware is in front of you too, which is exactly the problem, because the instinct is to keep working it, and forcing a bound lock is how a thirty-minute visit turns into a new door.

First: is this an emergency or an inconvenience

Make this call before anything else, because the two situations have completely different answers.

Call 911 if there is smoke or fire, a smell of gas, a medical problem, a child or vulnerable adult who needs to get out, or any reason you cannot safely wait. The Fire Department can force a door, and a damaged door is an acceptable price in that situation.
Call a locksmith if you are simply stuck, the apartment is safe, and there is time to do it properly. That is the path that ends with a working door instead of a broken one.

One thing to settle while you are thinking clearly: do not create a second exit through a window, over a railing, or down a fire escape unless you are in actual danger. More people are hurt improvising an exit than by waiting. The rules about what may block a window and a fire escape exist for the same reason, and our guide to window gates and fire escape requirements explains that line.

Why a New York apartment door can trap you

Most interior doors in the world cannot hold a person in. A New York apartment entrance can, because of what tends to be mounted on it.

A double-cylinder deadbolt. A deadbolt with a keyway on both faces instead of a thumb turn inside. Without the key in your hand, that bolt does not move. This is the single most common reason somebody is stuck inside.
A jimmy-proof rim lock, often called a police lock. The vertical surface-mounted lock with two bolts into a jamb-mounted strike. Reliable, but if the door has shifted the bolts can bind hard enough that the turn knob will not move them.
A mortise lock with an interior thumb turn. Common in prewar buildings. When a part inside the case breaks, the handle, the latch and the bolt can all stop responding at the same moment.
A multi-point lock. Several bolts driven by lifting the handle. If one point jams, the handle will not complete its travel and nothing retracts.
A door and frame under pressure. Steel doors in masonry openings move with heat, humidity and settlement. A latch that was fine last week can sit tight against the strike this week.

If you are not sure which of these you are looking at, our guide to identifying your door lock type names the shapes. For the two specific designs most often involved here, see double-cylinder deadbolts and jimmy-proof and police locks.

A New York City apartment door fitted with two separate locks above the handle

Diagnose it in two minutes without breaking anything

Work through this in order and stop at the first answer that matches. Use light pressure only.

Count the locks. Touch each one and confirm which are engaged. People routinely fight a stuck latch while a second lock above it is still thrown.
Try each lock on its own. Retract one, then the next, in order from the top down. Do not try to open the door until every bolt is back.
Does the thumb turn or knob rotate at all? If it rotates freely with no resistance and no bolt movement, something inside has broken. If it will not rotate, the bolt is bound or there is no inside release at all.
Does the handle move the latch? Watch or listen at the door edge. A handle that turns with nothing happening is a broken connection inside, which is covered in loose and broken door handles.
Is the door under load? Push the door firmly toward the frame, or lift it slightly by the handle, while you turn the lock. If a bolt suddenly frees, the door had shifted and the bolt was pinched in the strike.
Is there a key in the cylinder that will not turn? Stop. Do not apply force, because a key that snaps inside turns a simple job into an extraction. See why a key will not turn and what to do when a key breaks in a lock.

If step five frees the door, you have a working door and a real underlying problem. Read why a door will not lock properly, because a bolt that pinches today will pinch again, and next time it may not let go.

What not to do

Every item here makes the outcome worse and the repair more expensive.

Do not force the handle or the turn. Cast parts snap, and a snapped internal part removes the one working path out.
Do not pry at the door edge. You will deform the frame, and a deformed frame holds the bolt tighter.
Do not pull the hinge pins on a steel apartment door. The door is heavy, the pins are often not removable, and many apartment entrance doors have security pins that stop exactly this.
Do not take the lock apart from the inside unless somebody competent is telling you to. A half-disassembled lock is harder to open than an intact one.
Do not kick a steel door in a masonry frame. It will not move, and you will get hurt.
Do not climb out. Not a window, not a balcony, not a fire escape, unless you are in real danger.

The double-cylinder deadbolt problem

This deserves its own section because it is both the most common cause and the most preventable.

A double-cylinder deadbolt is attractive for one reason: a burglar who breaks the glass beside the door cannot simply reach in and turn a thumb turn. The cost of that benefit is that the people inside also cannot open the door without a key. The principle that building and fire codes work from is straightforward, and the full guide to double-cylinder deadbolts covers it: a door in a means of egress has to open from the inside without a key, a tool or special knowledge. Whether a particular door is classed as a required exit is a determination for the building department or the fire official with jurisdiction, not for a resident and not for a locksmith. The practical rule is simpler than the legal one. If a person could end up behind that door needing to get out, do not put a key on the inside.

If you have one on your apartment door right now, the sensible move is to change it to a single-cylinder deadbolt with an interior thumb turn. If you believe you need the glass protection, the answer is laminated or reinforced glazing and a better frame, not a lock that holds you in. Until the hardware changes, keep a key for that bolt where everyone in the household can reach it, hung inside the apartment and nowhere near the outside of the door. A key left in the cylinder defeats the burglary protection you installed it for, and a key hidden outside defeats everything, which is the point made in key lockbox safety.

The same principle applies to interior gates and secondary hardware. Anything that needs a key to open from the inside is a liability on an exit path. Fire escape and exit door lock requirements covers how this reasoning applies to the rest of a building.

Getting a locksmith to you when you are the one inside

This is the part people get wrong, because the lockout they picture is the opposite of the one they are in. A few specifics make it go smoothly.

Say that you are inside. It changes the approach. The work is done from the hallway side, so the locksmith needs building access, not apartment access.
Arrange the building entrance. You cannot come down and buzz anybody in. Call the super or a neighbor, or have the locksmith call you at the intercom so you can release the door if your intercom works from inside the apartment.
Describe the hardware. How many locks, where they sit on the door, whether there is a keyway on the inside face, and whether a key is stuck in one. That determines which tools come up the stairs.
Say whether the door is a steel apartment door or a wood door, and whether the building is prewar. Those two facts predict most of what is behind the face.
Mention anyone vulnerable inside, including a child, an older adult, or anybody who needs medication, so urgency is understood correctly.

From the hallway side almost every apartment lock can be opened nondestructively, which is covered in how a locksmith opens a door without damage. The honest exceptions are a bolt that is physically bound by a shifted door, and a lock with a broken internal part, where a drilled cylinder or a removed lock body is sometimes the only route. In those cases you should be told before it happens, along with what the replacement will be. How long it takes a locksmith to open a door sets expectations on time.

Fix the cause once you are out

Getting the door open is the emergency. Not having it happen again is the actual job.

Replace a double-cylinder deadbolt with a single-cylinder deadbolt and an interior thumb turn. This is a short, inexpensive visit and it removes the whole failure mode.
Correct the door and frame. If the bolt was pinched, the door has moved. Tightening hinges, resetting the strike and adjusting the frame is what stops the pinching. See strike plates and frame reinforcement and door hinge security.
Service or replace worn hardware. A thumb turn that spun freely, a handle that turned without effect, or a gritty mechanism has reached the end. Signs a lock needs replacing lists the rest.
Make the hardware easier to operate if anyone in the household struggles with small knobs or tight turns. Easy-to-use locks for seniors covers lever handles and thumb turns that need less grip strength.
Keep it maintained. Almost nothing on this page happens to a lock that gets checked twice a year. Door lock maintenance covers the routine.
Tell the building if the failure is on hardware the building owns, or if the entrance door of the building has the same problem. A broken building front door lock is a shared problem with a different owner.

If the hardware change needs doing, lock change and rekey service handles the swap, and residential locksmith service covers the door, the frame and the alignment in the same visit. If you are the one in the hallway rather than the apartment, apartment lockout service is the page you want.

A short household checklist

Every adult in the home knows how to open the entrance door, in the dark, without looking for anything.
No lock on the exit path needs a key from the inside.
Nothing is stored against the door or on the fire escape.
A trusted neighbor or the super can reach your floor if you cannot come down.
A locksmith number you have already checked is saved in your phone, not searched for in a panic. How to choose a locksmith in NYC explains what to look for before you need one.

Frequently Asked Questions

What should I do if I am locked inside my apartment and cannot get out?

If there is smoke, fire, a smell of gas, a medical emergency, or anyone who cannot safely wait, call 911 first. If the apartment is safe, stop forcing the lock and call a locksmith, and say clearly that you are inside, because the work is done from the hallway side and the locksmith needs building access rather than apartment access. Forcing a bound lock is what turns a routine opening into a new door.

Why will my apartment door not open from the inside?

The common causes are a latch jammed against a misaligned strike, a double-cylinder deadbolt that needs a key you do not have in hand, a jimmy-proof rim lock whose bolts have bound because the door shifted, a broken interior thumb turn or handle, or a key snapped off in the cylinder. Touch each lock in turn and confirm which are still engaged before you try the door again.

Can a locksmith open my door if I am inside the apartment?

Yes. Almost every apartment lock can be opened nondestructively from the hallway side. The practical problem is building access, since you cannot come down to let anyone in, so arrange the entrance through your super, a neighbor, or the intercom. Tell the dispatcher how many locks there are, where they sit on the door, and whether a key is stuck in one.

Is it legal to have a deadbolt that needs a key on the inside?

Building and fire codes work from the principle that a door in a means of egress has to open from the inside without a key, a tool or special knowledge. Whether a particular door is classed as a required exit is a determination for the building department or the fire official with jurisdiction, not for a resident or a locksmith. The practical rule is that if a person could end up behind that door needing to get out, there should be no key on the inside.

Should I climb out a window or down the fire escape instead of waiting?

No, unless you are in actual danger. More people are injured improvising an exit than by waiting for the door to be opened. If the apartment is safe, the right move is to stop working the lock and get a locksmith to the hallway side of the door.

How do I stop this from happening again?

Replace a double-cylinder deadbolt with a single-cylinder deadbolt and an interior thumb turn, which removes the whole failure mode in one short visit. If a bolt was pinched, the door has moved, so tighten the hinges and reset the strike. Service or replace hardware that spun freely or felt gritty, and check every lock in the home twice a year.

Locked Inside Your NYC Apartment: When the Door Will Not Open From the Inside