My NYC Apartment Door Won't Lock. Who Has to Fix It?
Your landlord. If you rent in a New York City multiple dwelling and the lock on your apartment door is broken, stuck, or will not throw, fixing it is the owner's legal obligation, not yours, and not a cost you are supposed to absorb.
That is the short version. The useful part is which law actually applies, because nearly every guide on this question cites the wrong section, and the difference decides how fast your landlord has to move.
The two sections that matter
The first is NYC Administrative Code § 27-2043, which says what has to be on the door in the first place:
The owner of a dwelling shall provide a key lock in the entrance door to each dwelling unit and at least one key. In a class A multiple dwelling such door shall be equipped with a heavy duty latch set and a heavy duty dead bolt operable by a key from the outside and a thumb-turn from the inside.
The second is § 27-2005(a), the general repair duty, and it is one sentence:
The owner of a multiple dwelling shall keep the premises in good repair.
A lock that exists but does not work fails the second one. That is the whole legal argument, and it is short because it does not need to be long.
The section almost every tenant guide gets wrong
Search this question and you will find page after page citing § 27-2043 for a broken lock. That is the section that says the lock must exist. It is not the section HPD writes you up under when the lock stops working.
We checked the city's own enforcement records to be sure. In the NYC Open Data housing violation dataset, a broken apartment lock is recorded under § 27-2005, and the inspector's text reads like this:
§ 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE LOCK AND ASSEMBLY AT DOOR IN THE ENTRANCE LOCATED AT APT 3, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTH
There is a trap in that dataset worth knowing about, because it is why bad numbers circulate. Search it for "27-2043" and you get well over a hundred thousand records, which looks like a staggering number of lock violations. Almost none of them are locks. They are § 27-2043**.1**, a different subsection entirely, and it is about window guards. If you see a huge lock-violation statistic quoted somewhere, that is probably where it came from.
What class your violation gets, and why it sets the clock
When an HPD inspector confirms the condition, the violation is given a hazard class, and the class sets the correction deadline. From HPD's own ABCs of Housing:
| Class | Meaning | Time to correct |
|---|---|---|
| A | Non-hazardous | 90 days |
| B | Hazardous | 30 days |
| C | Immediately hazardous | Immediate |
Broken locks land high on that scale. Of the defective-lock violations recorded since August 2024:
| Class | Count | Share |
|---|---|---|
| C, immediately hazardous | 3,370 | 56% |
| B, hazardous | 2,458 | 41% |
| A, non-hazardous | 168 | 3% |
97% are written as hazardous or immediately hazardous. A landlord who tells you a broken entrance lock is a routine maintenance ticket is describing the 3% case.
Which class you get depends mostly on which door. An apartment entrance door that will not lock is the strong Class C candidate. An interior door, a bathroom privacy lock, a foyer door inside the unit, those are where the B and A classifications tend to show up.
How to report it
- Tell the landlord or super in writing first. Text or email, not a hallway conversation. You want a timestamp. Say which door, what it does, and since when.
- Give it a short, reasonable window. For a front door that will not lock, that is days, not weeks.
- Call 311 or file online at nyc.gov/311 if nothing happens. Ask for a housing maintenance complaint and describe it as a broken entrance-door lock, not "a door problem." The wording steers the inspection.
- Be reachable for the inspection. HPD has to get inside to see the condition. A missed inspection closes the complaint and you start again.
- Keep the complaint number. It is the reference for everything that follows.
What if you just want it fixed tonight
There is a legitimate middle path, and it is worth knowing before you spend a night behind a door that will not lock.
Under Multiple Dwelling Law § 51-c, a tenant in a multiple dwelling may install their own lock on the apartment entrance door, in addition to the one the owner supplied. The lock must be no more than three inches in circumference, and you have to give the landlord a duplicate key if they ask. Any lease clause charging you for that right is void as against public policy. We covered the full rule in can a tenant change the locks in NYC.
That gets you a working lock the same day. It does not cancel the landlord's obligation to repair the broken one, and it does not automatically mean you can deduct the cost from rent. Rent withholding and repair-and-deduct have their own rules and their own risks, and that is a conversation for a tenant attorney or your local housing clinic, not a locksmith.
What is actually wrong with the door
Most "won't lock" calls in NYC come down to a handful of causes, and the cheap ones are more common than people expect.
The deadbolt will not throw, or only goes partway. Usually the door and frame have shifted, so the bolt no longer lines up with the strike plate. Old buildings move. This is frequently a strike-plate adjustment, not a new lock.
The key turns but nothing happens. The cylinder is turning without driving the bolt. A worn or broken tailpiece, or a failed cam. A repair, not a replacement.
The lock is stiff or sticks halfway. Worn pins or a worn key. A key cut from a copy of a copy drifts far enough that it stops working. Sometimes the fix is a fresh key cut from the original code.
It will not lock from the outside but works from inside. Often a latch or closer problem rather than the lock body.
The whole assembly is loose. Mounting screws have pulled out of a soft old jamb. Common in pre-war stock, and repairable.
Full detail on each of these is in lock installation and repair NYC. If a key snapped off inside, that is a different job and we wrote it up in broken key in a lock.
What it costs
If you are a tenant, you should not be paying this. The figures are here so you can tell whether a quote your landlord got is reasonable, and because owners read this too.
| Job | NYC cost |
|---|---|
| Strike plate realignment or latch adjustment | from $125 |
| Cylinder repair or tailpiece replacement | from $125 |
| Rekey, per cylinder | from $75 |
| Grade-2 deadbolt, supplied and installed | from $150 |
| Full lock and assembly replacement | $150 – $450 per opening |
A broken entrance lock is rarely a $500 job. If someone is quoting that for a door that simply will not latch, get a second opinion. Our lock change and rekeying service covers all five boroughs, and we give a firm price before any work starts.
Frequently Asked Questions
Is my landlord legally required to fix a broken apartment door lock in NYC?
Yes. NYC Administrative Code § 27-2005(a) requires the owner of a multiple dwelling to keep the premises in good repair, and § 27-2043 requires a working key lock on the entrance door of each unit. A lock that no longer works fails both. HPD records these violations under § 27-2005, and 97% of defective-lock violations since August 2024 were classified hazardous or immediately hazardous.
How long does my landlord have to fix it?
It depends on the hazard class HPD assigns. Class C, immediately hazardous, means immediately. Class B, hazardous, is 30 days. Class A, non-hazardous, is 90 days. A broken apartment entrance lock is usually Class B or C.
Can I just change the lock myself and send my landlord the bill?
You can install your own additional lock under Multiple Dwelling Law § 51-c, up to three inches in circumference, giving the landlord a duplicate key on request, and no lease clause can charge you for it. Billing the landlord is a separate question. Repair-and-deduct and rent withholding have specific requirements, and getting them wrong creates a rent arrears problem. Ask a tenant attorney before you take that route.
What if the landlord changed the lock and did not give me a key?
That is not a repair issue, it is an illegal lockout, and it carries criminal and civil exposure regardless of what you owe in rent. We covered it separately in locked out by your landlord in NYC.
Does this apply if I live in a two-family house?
Section 27-2005 has separate provisions for one- and two-family dwellings, and Multiple Dwelling Law applies only to buildings with three or more independent families, so § 51-c does not give a two-family tenant the statutory right to install their own lock. If you are in a small house and unsure which rules reach you, ask a housing attorney before relying on either section.
The super says it is my fault because I broke the key off. Does that change anything?
It can change who pays, but it does not remove the owner's duty to keep the lock in good repair. Damage caused by a tenant is a cost-allocation argument between you and the landlord. It is not a reason for the door to stay unlockable while that argument runs.
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