Local Guide
Can a Landlord Change the Locks in New York? What Westchester Landlords and Tenants Each Need to Know
This is one of the most common calls we get, and it is almost always someone who is upset. A landlord wants a unit back. A tenant came home and the key no longer turns. Both are asking the same question: who is actually allowed to change this lock? Here is how it works in New York, and what a locksmith needs to see before touching a cylinder.
A lock is a small piece of hardware carrying a surprisingly large legal question. Changing one at the wrong moment can turn an ordinary property dispute into a criminal matter, and the locksmith who turns the screwdriver can end up part of the problem. This guide separates what is allowed from what is not, for both sides, in plain language.
The Short Answer
If someone is lawfully living in the property, a landlord in New York may not change the locks to remove them. Not for unpaid rent, not for a lease violation, not because the tenant is difficult. Eviction in New York runs through the courts, and the final step is carried out by a marshal, sheriff or constable. Changing a lock to shortcut that is called a self-help eviction, and New York does not allow it.
If the unit is legally vacant, the owner may change the locks freely. Turnover between tenants, a completed eviction, a property the owner occupies. That is ordinary maintenance and a good idea.
A tenant usually may rekey their own door, subject to what the lease says, and normally has to give the landlord a copy of the key so the landlord keeps lawful access for repairs and emergencies.
Please read this part
This is general information written by a locksmith, not legal advice, and it does not create an attorney-client relationship. Landlord and tenant law is fact-specific and it changes. Before you act on a lockout, an eviction or a lease dispute, speak to a lawyer or your local housing court. If you believe you are in immediate danger, contact law enforcement.
When a Landlord May Change the Locks
There are four ordinary situations where changing the cylinder is entirely proper, and we do this work for Westchester owners and managing agents constantly.
- Turnover between tenants. Once the previous tenant has surrendered possession, rekey before the next one moves in. New York does not require it, which surprises people, but the previous tenant, their guests, cleaners and contractors may all still hold working keys. A rekey resets that in one visit without replacing the hardware, and a tenant mailbox lock change can be done at the same appointment.
- After a completed, lawful eviction. When the warrant of eviction has been executed by the marshal or sheriff, possession is legally restored to the owner and the locks get changed on the spot. This is normally the same appointment.
- At the tenant's request, or with their consent. A tenant who lost their keys or had a break-in can ask for a change, and often the landlord arranges it.
- To secure the property in a genuine emergency. After a fire, a flood or a forced entry, an owner may need to secure a door immediately. Securing a damaged unit is not the same as excluding the tenant, and the tenant should get access and a new key without delay.
For owners running several buildings, this is also the moment to think about whether every door should be on its own key at all. A master key system lets a superintendent carry one key for common areas while each unit keeps its own, which removes most of the reason people improvise with lock changes in the first place.
When a Landlord May Not: Illegal Lockouts
This is the part that costs people money. In New York, removing an occupant by changing the locks, taking the door off, removing their belongings or shutting off essential services is unlawful. The Housing Stability and Tenant Protection Act of 2019 sharpened this considerably: unlawful eviction of someone who has occupied a dwelling for thirty days or more is a criminal offence in New York, and it carries civil exposure on top of the criminal side.
Three points that catch landlords out:
- Unpaid rent does not change the answer. A tenant genuinely owing months of rent still cannot be locked out. The remedy is a nonpayment proceeding in court, not a new cylinder.
- There does not have to be a written lease. Occupancy, not paperwork, is what matters. Someone who has lived there thirty days generally has possession rights even with no lease, no rent receipts and nothing in writing.
- A tenant locked out unlawfully can be put back. New York gives a locked-out occupant a route back into the property through the court, and the landlord can end up paying for the privilege of having tried.
If you are the one who has been locked out, document it. Photograph the door, keep the messages, and go to your local housing court or a tenant advocacy service quickly. We cannot let you back into a property on your say-so, and no honest locksmith will, but a court order changes that in an afternoon.
Can a Tenant Change the Locks?
Usually yes, with conditions, and the conditions are in the lease. Read it before you call anyone.
Most Westchester leases take one of two positions. Either they permit the tenant to change or rekey the lock provided the landlord receives a copy of the key, or they require written permission first. Very few flatly forbid it, because the landlord's real interest is not the cylinder, it is keeping lawful access for repairs, inspections and emergencies.
Practically, a rekey is the smoother option in a rental. The existing hardware stays exactly where it is, the door and frame are untouched, and at move-out there is nothing to restore. A full residential lock change replaces the hardware itself, which is the better choice when the lock is worn, damaged or simply bad, but it is the one more likely to need written sign-off.
One geographic note, because it comes up constantly: New York City has its own rules about tenant-installed locks in larger buildings. Westchester County is not New York City and those particular provisions do not apply here. If your property is in the five boroughs, check the city rules rather than assuming what applies in White Plains applies in the Bronx.
Unauthorized Occupants
The question we get in its rawest form is whether an owner can simply change the locks on someone who was never supposed to be there. The honest answer is that it depends almost entirely on how long they have been there, and the threshold is lower than most owners expect.
Once a person has occupied a dwelling for around thirty days, New York generally treats them as having possession rights that have to be ended through a court proceeding, regardless of how they got in. Before that point an owner has more room, but more room is not the same as certainty, and the penalty for getting it wrong is the criminal exposure described above.
This is exactly the situation where a phone call to a lawyer is cheaper than a lock change. We will not change a cylinder on a unit we can see is occupied without documentation, and you should be suspicious of anyone who offers to.
Separations and Shared Homes
People ask constantly whether they can lock a spouse or a partner out of their own home. It is a painful question and it deserves a straight answer.
If both people are on the lease or the deed, one generally cannot exclude the other by changing the locks. Both have a right to be there, and a unilateral lock change tends to make the situation legally worse for the person who did it. That remains true when the relationship has ended and one person has moved out voluntarily.
What changes the answer is a court. An order of protection, or an order granting exclusive occupancy of the home, can give one party the legal right to exclude the other. If you have that order in hand, we can usually help the same day. If you do not, the route is through the court, and if you are in danger, through law enforcement first.
What We Need Before We Change a Lock
Every reputable locksmith in Westchester asks some version of these questions, and it is worth explaining why rather than making it feel like an interrogation. A locksmith who changes a lock for someone without authority can end up a participant in an illegal lockout. Checking protects you, the occupant and us.
For a property you own or manage, we ask to see one of:
- A deed, a recent property tax bill or a mortgage statement in your name
- A lease or management agreement showing you have authority over the unit
- Photo identification matching that paperwork
For a unit currently occupied by someone else, we additionally need the legal basis for the change: an executed warrant of eviction, the marshal or sheriff present at the appointment, or a court order granting you exclusive occupancy. For a tenant changing their own lock, we ask to see the lease, or the landlord's written permission where the lease requires it.
None of this slows a legitimate job down much. A landlord turning over an empty apartment in White Plains or Greenburgh is usually done in half an hour. The paperwork question only becomes an obstacle when the answer is the one that should stop the job anyway.
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Frequently Asked Questions
Can my landlord change the locks if I am behind on rent?
No. Unpaid rent does not give a landlord in New York the right to lock a tenant out. The landlord has to bring a nonpayment proceeding in court, and only a marshal or sheriff acting on a warrant of eviction can actually remove a tenant. A lock change used to force someone out is an unlawful eviction regardless of what is owed.
Can I change the locks in my apartment without telling my landlord?
Check the lease first. Most Westchester leases either allow it provided you give the landlord a copy of the new key, or require written permission beforehand. Rekeying the existing cylinder is generally the easier option because the original hardware stays in place. Changing the lock with no notice, where the lease requires notice, puts you in breach even if your reason was a good one.
Does a landlord have to rekey between tenants in New York?
State law does not require it. That is exactly why it is worth doing, and worth asking about. If nobody rekeyed the unit, the previous tenant, their family and anyone who held a copy may still have a working key, and neither you nor the landlord can prove otherwise. It is inexpensive and it takes one visit.
What can I do if I have been locked out illegally?
Document the lockout with photographs and keep any messages about it, then contact your local housing court, a tenant advocacy organisation or a lawyer promptly. New York provides a route for an unlawfully excluded occupant to be restored to possession. A locksmith cannot let you back in on your word alone, but a court order changes that quickly.
Will you change a lock if I tell you I own the property?
We will ask to see documentation first, such as a deed, a recent tax bill, or a lease or management agreement, along with matching identification. If the unit is occupied we also need the legal basis for the change. It is a short conversation on a legitimate job, and it is the step that keeps everyone out of trouble.