These are the questions that come up when the door is in a Manhattan building with staff, a platform and a managing agent, grouped by situation: living alongside the building's own entry system, the paperwork before the visit, doormen and service providers, owners who are often away, short-stay hosting, office suites and landmark shopfronts. General renter and co-op rules are covered on our New York City smart lock page; cost, scheduling and coverage are in the FAQ further down. None of this is legal advice.
Living with the building's entry platform
My building already opens the lobby with an app — will a second app on my own door clash with it?
It will not clash electrically, because the building's system and a stand-alone unit lock do not talk to each other unless someone connects them. The practical issue is daily life: two apps, two sets of guest codes and two places to revoke access. A visitor you let into the lobby from the building's app still needs a separate code or an unlock from your lock's app to get through your door, and when your cleaner leaves you have to remember to remove them twice.
There are three ways to handle that. If the building's platform supports your lock model, the managing agent can enrol it, and the same app then opens the lobby, the elevator and your unit. ButterflyMX, for instance, says its platform connects with more than 80 smart lock styles and finishes, and that its door PINs and Bluetooth credentials keep working through a building-wide internet outage once a Wi-Fi lock has been integrated. If the building will not integrate, or you would rather the managing agent not administer your front door, a separate lock is perfectly reasonable — we simply set it up so the codes you hand out mirror the building's, with the same start and end dates.
The third option is the one most people overlook: a building whose units already have platform locks, such as many Latch buildings, may not allow a second lock on the door at all. Latch rebranded as DOOR in August 2025 and says it continues to support existing Latch hardware, so those locks are not going away. Before buying anything, ask management whether the unit door is yours to change. We are glad to put that question to them in writing.
Can my unit lock be enrolled in the building's system so the front desk can see it?
Sometimes, and it is worth thinking about whether you want that. Enrolment means the building's dashboard holds your lock: the desk can issue a one-time code for a delivery or a repair, see when the door was opened, and in some systems unlock it remotely. That is convenient for owners who are away, and it is the kind of arrangement many condos already expect for emergencies. It also means building staff and the platform company hold data about your comings and goings.
If you rent, the city's Tenant Data Privacy Act already limits what an owner can collect through a smart access system and bars making it the only way into your apartment, so enrolment should be your choice rather than a condition. If you own, the condo or co-op's own rules decide what the desk is entitled to. Either way, we recommend agreeing in writing what the desk can do with your lock — issue codes, view logs, unlock — before we enrol it.
Technically, enrolment depends on the lock's radio and the platform's integration list, not on how well it is installed. We check the model against the building's list, install it, and then hand over to the managing agent's administrator to complete the enrolment on their side, so nobody is guessing who controls what.
The paperwork before the visit
What should the scope letter to the managing agent say about the lock and the door?
Managing agents approve paperwork, not intentions, so the letter should answer their questions before they ask them. We draft it for you and include the lock's make and model with its specification sheet; whether the work is a retrofit on the inside only, a deadbolt swap in existing holes, or a change that needs new preparation; whether anything changes on the corridor side; how the door will still open from inside with one motion; and what emergency key or code the building will hold.
Where the door carries a fire-rating label, we say so and state that no preparation beyond what the label and the hardware listings allow will be made. On powered suite or lobby doors we add the release arrangement and whether the fire alarm is involved. We name the date window we are asking for, the number of technicians and the tools — drill, hole saw if needed, no wet work — and confirm the debris leaves with us.
Attach the insurance certificate the building asks for and the letter usually comes back in days rather than weeks. When it comes back with conditions, such as matching hallway finish or working only on Tuesdays, those go straight onto the work order.
Whose insurance answers if the door or the hallway is damaged during the installation?
Ours, for damage we cause. That is what the certificate of insurance is for: Brick Underground describes a COI as proof that the contractor carries a policy covering liability and loss, and co-op buildings routinely require one before any work starts. Many buildings also ask to be named as additional insured; we arrange that wording to match the managing agent's request.
What the certificate does not cover is a pre-existing problem we uncover — a door already warped, a frame already cracked, a strike already loose. That is why we photograph the door, the frame and the corridor finish when we arrive and show you anything we find before we start. If the door is not fit for the lock, we say so and stop, rather than turning a lock job into a door replacement without your agreement.
Your own homeowner's or renter's policy, and the building's master policy, sit behind ours for everything else. If your proprietary lease or condo by-laws say alterations must be insured in a particular way, send us that clause and we will check our certificate matches it.
Doormen, concierges and service providers
How should the doorman, the dog walker and the cleaner get in once the door has a code instead of a key?
Give each of them their own credential and decide how far each one goes. A dog walker's code might work weekdays from 11 to 3; a cleaner's only on Thursdays; the doorman's emergency access might be a code kept sealed at the desk, or the building's own key held under the board's rules. Everyone gets a different code so the lock's log shows who came in, and so one person can be removed without changing everyone else's.
Most Manhattan buildings will still want the desk involved: staff announce or log service providers on the way up. A smart lock does not replace that; it removes the step where the desk hands over your key. That matters, because the weak point in a doorman building is the key cabinet — in August 2026 FOX 5 reported that a concierge at a Long Island City tower handed a vacationing couple's keys to a woman who claimed to be their dog walker. With personal codes, nobody at the desk is holding a key to your apartment for a stranger to talk their way into.
We set up the schedules with you at handover, label each code by person in the app, show you how to suspend one in seconds, and leave a short written sheet you can share with the desk so they know who is expected.
Should packages still go to the desk if a smart lock could let couriers into the apartment?
For most buildings, yes. Some smart lock makers offer in-home delivery with a one-time unlock while you watch on a camera, but in a building with a package room, the desk is already doing that job with less risk. Letting a courier past the desk and into your unit means the building has to allow it, and many do not. It also means the delivery is now inside your home rather than in a monitored room.
Where there is no package room, or the desk is part-time, a one-time code for a specific delivery window is safer than leaving keys with a neighbour. Pair it with a doorbell camera or an indoor camera facing the door, and keep the code single-use so it expires as soon as the door closes.
If you want in-unit grocery or laundry drop-offs on a schedule, set them up as a named recurring code rather than a shared one, so the log shows exactly which service came and when. Our doorbell camera installation in Manhattan covers the camera side.
What stops someone who talks their way past the lobby from getting through my door?
The lock itself, if it is set up properly. A person who gets past the desk on a story still faces a door that only opens with a personal code, a phone credential or a key held under controlled conditions. That is a big improvement over a building where the desk can simply hand out a key. The details that make the difference are auto-lock, so the door never sits unlatched after someone leaves; tamper lockout, so repeated wrong codes freeze the keypad and alert you; and no default or shared codes.
Keypads have a known habit of showing wear on the numbers that are used most. Locks with a scramble feature let you type extra digits before or after the real code, which hides the pattern. Fingerprint models avoid the issue entirely for the household, with codes kept for visitors.
Finally, the alerts have to reach you. A lock that is offline cannot tell you anything, so we confirm notifications arrive on your phone over mobile data, not just on the home Wi-Fi, before we leave.
Owners who are often away
If the batteries die while we are out of the country, how does anyone get in?
Plan for it on day one, because it is the most common pied-à-terre call we get. Smart locks warn of low batteries well before they fail, but the warning only helps if it reaches you and someone can act on it. Schlage, for example, quotes up to six months of battery life for its Encode locks with typical use; heavy daily use, an exposed cold corridor or a lock that strains against a sticky strike shortens that.
The fallbacks, in order: many keypad locks have external contacts for a temporary nine-volt or USB-C power boost, which lets you key in a code and get inside to change the batteries; a keyed override, if the building holds a key under its emergency rules; and a trusted person — often the super or a resident manager — who has instructions and, if you agree, an admin role in the app. We test whichever of these your lock supports before we leave and write it down for you.
Owners away for months can also ask the desk or a cleaner to change the batteries on a schedule. Lithium AA cells are rated by Energizer to work from minus 40 to 140 degrees Fahrenheit, but alkaline cells are what most locks are specified for — follow the lock maker's instructions, and change all of them at once.
Can a renovation crew work in the apartment for a week without being given a key?
Yes, and in Manhattan this is often the main reason owners add a smart lock. The contractor gets a code that works only on the agreed days and within the building's permitted hours — for example 9 to 5 on weekdays, which is what Brick Underground notes most alteration agreements allow. When the job ends, the code expires on its own; no keys to collect, no locksmith to call because a key went missing.
Give each trade its own code if the job has several. The log then shows who arrived when, which helps if the building questions noise outside the permitted hours or a neighbour reports damage in the corridor. Pair the lock with an indoor camera if you want to see progress, and tell the crew it is there.
One caution: some renovation work involves taking the door off or replacing it. If that is planned, install the smart lock after the new door is hung, or have us remove and refit it so the door supplier does not have to deal with electronics.
Short-stay hosting and the city's rules
Can a keypad let us rent the apartment to visitors while we are away?
Not for stays of under 30 days. NYC311's guidance on Local Law 18 is plain: hosts, whether owners or tenants, cannot rent an entire apartment or home to visitors for fewer than 30 days, even if they own or live in the building, and this applies to all permanent residential buildings regardless of the number of units. Registered hosts must stay in the unit with the guests and may have no more than two guests. A keypad makes the hand-off easier; it does not make the rental legal.
Rentals of 30 days or more fall outside the short-term rules, subject to your lease, your proprietary lease or the condo's by-laws, many of which set their own minimum terms or require board approval for any rental. For those, a smart lock is genuinely useful: a code that starts on move-in day and ends at checkout, with a separate one for the cleaner between tenancies.
We install locks for owners and hosts who are doing it legally. If you are not sure which side of the line your plan falls on, the Office of Special Enforcement's registration pages and your building's managing agent are the people to ask before you buy a lock for the purpose.
We host a registered guest while we are home — can the guest bedroom get its own smart lock?
Not a lock that keeps the guest out of the rest of the apartment, or you out of the guest's room in a way that splits the home in two. NYC311's guidance says a host must ensure every guest has access to all parts of the dwelling unit and to each exit, and NY1's coverage of the rules when enforcement began in September 2023 summed it up as “no locked doors.” Turning a bedroom into a self-contained, separately locked suite is exactly what the rule is written to prevent.
What remains useful is the front door: a guest code that starts and ends with the stay, so you are not cutting keys for someone who will be gone in a week, and that you can cancel instantly if the stay ends early. Privacy for a guest inside the home can come from an ordinary privacy latch that opens from the corridor side with a tool in an emergency, which is not a smart lock at all.
Interior smart locks have legitimate uses — a home office with work files, a storage room, a wine room — and we fit them often. They are just not the tool for a short-term rental arrangement.
Key lockboxes keep appearing on the railings outside our building — what can the building do?
Start with the lobby door. Lockboxes clipped to tree guards and railings are usually there because someone needs to give a visitor a building key without being present. Chelsea residents complained about exactly this in 2016, when the local paper counted eleven of them on one block of West 21st Street; the Parks Department said lockboxes on tree guards are not an authorised use of its property. If the building's front door accepts personal codes or phone credentials, there is no building key for anyone to leave in a box.
For a co-op, condo or rental building, that means a keypad or fob reader on the street door, codes issued per resident and per authorised visitor, and a log the managing agent can check. It also means the building can see when a single unit's credentials are being used by a stream of strangers, which is a far better signal of an illegal hotel than a box on the fence.
Remove the boxes you can lawfully remove, report the rest to the Office of Special Enforcement if you suspect illegal short-term rentals, and fix the door. Our building-door pricing is in the cost section below, and our door buzzer installation in Manhattan covers older entry panels.
Office suites in towers
Our suite is in a Midtown tower with its own card system — can our door have a different lock?
Usually, with the landlord's agreement. Most Class A leases let the tenant secure its own premises but require approval for anything that touches the base-building system, the corridor or the life-safety wiring, and many landlords keep a list of approved access vendors. The cleanest answer is often a suite lock on its own controller or a cloud platform the tenant administers, with the landlord's base-building credential still opening the lobby and the elevator.
The alternative is to put the suite door on the landlord's platform. Some platforms are designed for this — Kastle, for example, advertises a single mobile credential that moves between base building and tenant spaces — and it saves staff carrying two credentials. It also hands control of your door to the landlord's system and its fees, which not every tenant wants.
We will walk the suite, read the relevant lease clause with you, and put a short proposal to the property manager. The aim is a door your team can manage day to day that the building's engineer is comfortable with.
Can an electric strike be cut into the labelled steel frame of a suite entrance?
Only within what the frame's and the strike's listings allow. NFPA 80, the fire-door standard, limits job-site preparation of fire door assemblies to round holes for listed hardware; a rectangular strike cutout in a rated frame is a field modification unless the listing permits it, and otherwise needs the listing laboratory's approval. If an alteration is made without approval, the door or frame may need to be re-labelled after a site visit by the lab, which is slow and expensive.
So we read the label before choosing hardware. Often the answer is a frame that was factory-prepared for a strike, a fire-rated electric strike in an existing prep, an electrified lockset with a power transfer hinge, or a surface-applied solution listed for the assembly. Where none fits, we tell you before anyone picks up a saw.
Non-rated suite doors, such as many glass fronts on interior corridors, give far more freedom — but we still confirm with the building which doors are rated, because a corridor that looks like ordinary office space can be part of a rated exit path.
Does a magnetic lock on our glass suite door have to release when the fire alarm goes off?
The release rules depend on the arrangement. NYC Building Code section 1010.1.9.9 permits electromagnetic locks on doors to tenant spaces in business occupancies where the door has hardware with a built-in switch that is obvious, operable with one hand under all lighting conditions, interrupts power to the magnet directly, and where loss of power unlocks the door. Where panic hardware is required, operating it must also release the magnet. Separate provisions in the code govern sensor-release arrangements, and those tie release to the building's fire alarm and sprinkler systems.
In practice, many Manhattan towers also require tenant locks on egress paths to drop on a fire alarm signal regardless, because that is how their fire safety plan works. That means coordination with the building's fire alarm vendor and the building engineer, and sometimes a filing, before the lock is live.
If your glass door is not on an egress path — the suite has another exit and the door is not required for egress — the options widen. We map the suite's exits with you and the building before recommending maglock, electric strike or electrified lever.
Our team works late — how does after-hours access fit with a suite smart lock?
Most Manhattan towers run the lobby on staffed hours and require a base-building credential, sign-in or advance notice after hours and at weekends. The suite lock should follow the same rhythm: schedules that unlock the suite during business hours and require a personal credential outside them, and an after-hours list that matches the one the building's security desk holds.
Keep the two lists in step. When an employee leaves, remove them from the suite system and ask the building to cancel their lobby credential the same day. Cloud-managed suite locks make that a one-click job; key-and-cylinder suites mean a re-key.
For the cleaning crew, which in many towers is the landlord's contractor, give the suite a code limited to the cleaning window, and check the log the first week to make sure the window is right.
Shopfronts in landmark districts
Can the reader sit behind the glass so nothing new goes on a cast-iron facade?
Often, yes, and that is our first choice on SoHo, NoHo and Tribeca storefronts. Many card and phone readers will read through a single pane of glass at short range; others mount on the interior jamb, visible from the street but fixed inside. Staff present a card or phone to the glass, the strike or electrified lock on the door frame releases, and the facade is unchanged. The NoHo BID's guidance notes that most window and door work needs an LPC permit but that repairing or replacing hardware such as knobs, hinges and handles does not; a reader inside the shop keeps the job as close to the second category as it can be.
Not every reader works through every glass. Coated, laminated or very thick glazing can kill the signal, so we test on site with the actual reader before committing. If an exterior reader turns out to be the only way, the job pauses while the owner or tenant confirms with the landlord and the Landmarks Preservation Commission what is approvable.
Remember that the whole designated property, including the sidewalk, is landmarked in a historic district — not just the facade — so nothing goes into the sidewalk or the stoop either without the same check.
