Can You Put a Smart Lock on a NYC Rental Apartment?

Usually yes. New York Multiple Dwelling Law section 51-c gives tenants in most New York City apartment buildings the right to install and keep one extra lock on the apartment entrance door at their own expense, as long as it is no more than three inches in circumference and you hand the landlord a duplicate key when they ask for one. What the law does not give you is the right to rip out the lock the landlord installed. So the safe path for a smart lock in a NYC rental apartment is one that adds to the door, or clips onto the inside of the deadbolt you already have, and comes back off in ten minutes at move-out.

I get this question every August and September, when half of New York moves on a September 1 or October 1 lease start. Three problems come up on almost every one of these jobs: the lease says no alterations, the landlord still wants a key, and the door is out of alignment. Here is how each one gets solved, which keyless entry options work in a rental, and what to do if you also need to rekey after moving in.

Can You Legally Add a Smart Lock to a NYC Rental Apartment?

Yes, within limits set by the state. Under New York Multiple Dwelling Law section 51-c, titled "Rights of tenants to install and maintain locks in certain entrance doors," a tenant may install and maintain a lock on the entrance door of their apartment in addition to the lock supplied by the owner. The statute sets three terms that matter for smart locks:

• The lock must be separate from the lock the owner installed, and no more than three inches in circumference.
• A duplicate key goes to the landlord or their agent on request.
• Any lease clause charging you extra rent, a bonus, or a fee for that additional lock is void as against public policy under the same section.

The duplicate key line is where smart locks get interesting. The New York Attorney General's Residential Tenants' Rights Guide states that failing to give the landlord a duplicate key can be construed as a violation of a substantial obligation of the tenancy and can lead to eviction proceedings. A keypad-only lock has no keyhole, so there is no key to hand over. That is why I steer renters toward a smart lock that leaves the original keyed deadbolt in place and working: the landlord keeps the key they always had, you get the keypad.

Two limits worth knowing. Section 51-c does not cover buildings run by a municipal housing authority, hotels, motels, or dormitories. And the same guide confirms a landlord may enter with reasonable prior notice, and without notice in a real emergency such as a fire or a leak, so whatever you add has to leave that access intact. This is general information, not legal advice. Read your own lease, and ask the managing agent in writing if the wording is unclear.

Which Smart Locks Are Renter-Friendly and Reversible?

A renter-friendly smart lock is one you can take off without leaving a mark. Three types show up on real NYC jobs, and they are not equally safe choices for a lease.

• A retrofit smart lock (interior only). A motorized module that mounts on the inside face of your current deadbolt, in place of the thumb turn, using the screw holes already there. The outside of the door does not change and the landlord's key still works. August lists its Wi-Fi retrofit model around $200 on august.com as of July 2026 and describes it as installing over the existing deadbolt so you keep your existing keys. In a rental, this is the one I recommend first.
• A full smart deadbolt swap. The whole deadbolt comes off and a smart one goes on. Schlage lists its smart deadbolts from $199 to $399 on schlage.com as of July 2026. This changes the landlord's hardware, so it needs written permission, and the original lock goes in a labeled bag for move-out day.
• A keypad add-on. A coded lockbox, or a keypad lever on an interior door, in the $30 to $120 range. Nothing on the entrance door changes, which makes it the fallback when a building says no to everything else.

What a Smart Lock Costs in a NYC Apartment

Hardware runs about $150 to $400 based on the manufacturer list prices above. Professional installation in New York City typically runs $75 to $300 per lock plus a service call fee of roughly $25 to $50, in line with our own NYC locksmith pricing. Those are July 2026 estimates, not a quote, and they move with the lock, the door, and the hour of the visit. A retrofit on a door that already closes properly is the cheap version of this job. A door that needs its strike plate reset costs more, and skipping that fix is how a $250 lock ends up jamming twice a week.

What to Check in Your Lease and With Your Building Before Installing

Check four things before a screwdriver comes out, in this order.

• The alteration clause in your lease. Most New York City leases bar alterations without written consent. Adding a lock is protected by statute, changing the landlord's lock is not. Get the yes in writing, email is fine, and keep it.
• House rules in a co-op or condo. Boards regulate anything visible in a shared hallway, and some require an alteration agreement or a specific hardware finish. A retrofit lock usually clears this easily because nothing on the hallway side changes.
• The door itself. Apartment entrance doors here are often fire-rated with self-closing hinges. Boring a new hole in a fire-rated door can compromise its rating, which is not a risk worth taking on someone else's door. If the job needs new holes, it needs a pro and the landlord's sign-off.
• The building's own access system. Under New York City's Tenant Data Privacy Law, Local Law 63 of 2021, an owner running a smart access system needs your express consent to collect your data, must collect only the minimum needed, and cannot sell it. Worth knowing before you enroll in a building app.

One thing renters forget: a smart lock on your apartment door does nothing for the front door or the buzzer. If getting into the building is the real problem, that is a building intercom conversation with management.

Installation, Batteries, and Lockouts, and When to Call a Licensed Locksmith

A retrofit install is a screwdriver job on a healthy door. The trouble usually starts with the door. Four things my technicians see go wrong on rental installs:

• Alignment beats everything. If you have to lift or shove the door to throw the bolt today, a small motor will not do it tomorrow. Manual force hides misalignment, a smart lock exposes it. Fix the strike plate first.
• Batteries fail on a schedule, not by surprise. These locks run on AA cells for months and warn you in the app long before they quit. Change them at the first warning.
• Keep a physical key. When batteries die or the Wi-Fi drops, your original key still opens the door, which is the whole argument for the retrofit style. Leave a spare with someone you trust rather than under the mat.
• Bag the original hardware on day one. Thumb turn, screws, plates, all in one labeled bag. Refitting takes ten minutes at move-out. A missing part costs you deposit money.

Call a licensed locksmith when the job goes past a screwdriver: boring a door, anything fire-rated or metal-clad, hardwired or access-controlled hardware, a door that binds, or a landlord who wants proof a pro did the work. Top Notch Locksmith & Security is a licensed and insured locksmith company serving all five boroughs of New York City since 2010, and apartment, co-op, and condo doors are our daily work. We handle lock installation, a full lock change, and residential locksmith jobs across the city, including reversible installs that keep a lease intact.

Frequently Asked Questions

Get It Installed Without Risking Your Lease

If you want a keypad on your apartment door and your original key still in the landlord's hand, we do that install every week. Tell us the building type and what your lease says, and we will spec a lock that comes back off cleanly when you move. Call us any hour, or request a free quote and we will come look at the door.