Door Buzzer
Installation in
Homecrest

Quick answer: door buzzer installation in Homecrest runs $400 to $900 on our Brooklyn list for an audio buzzer with a new door release on a two-family, a one-story row house or a single store door, $700 to $1,800 for a video door station with indoor monitors or phone answering on a house or a very small building, and from about $2,500 to past $10,000 for a full entry system with a lobby panel and a station or app answering for every apartment in a walk-up or elevator co-op. Each price covers the door station, the answering units, the power supply, the electric strike or approved lock, the cable and the labor, and it is fixed in writing after a walkthrough, with any possible extra, such as an apartment line that might fail its test or a lobby closer that has to be replaced before the release can work, named and priced before you order. Homecrest is billed at the Brooklyn rate. Send photos of the lobby panel and one apartment station to (347) 934-8335 or on WhatsApp, and we reply with the range that fits, usually within two hours of your message during working hours.

• Looking at your photos and quoting a new system costs nothing. If an existing system has to be diagnosed in person first, that is the $250 service call booked online, and the $250 is applied toward the work.
• All work falls under New York State license #12000287431. We install low-voltage entry equipment; if the panel's power supply needs a new 120-volt outlet or circuit, a licensed electrician does that part, and you know before the job is priced.
• We work for whoever controls the door: the owner, the managing agent, a co-op or condo board or, for a store or office, the tenant with the landlord's written approval.

Need Repair in Homecrest? One Dead Station, a Failing Line or a Worn-Out System: Telling Them Apart Before You Buy Anything

Owners usually call us about one apartment. A tenant on the fourth floor cannot hear the lobby, or the release in 3C has stopped working, or the panel downstairs rings the wrong door. Sometimes that really is one station, and a repair is the right answer. ButterflyMX's October 2026 guide to small-building buzzers puts it well: repair "when the fault appears localized, compatible parts are available, and the rest of the system still does what the building needs," and "do not replace a system based on age alone." A sound 1960s audio system with one broken station can be worth keeping.

The same guide lists when replacement becomes the better spend: "when service calls keep coming back, parts are no longer supportable, inspected wiring cannot support the desired equipment, or the property needs functions the existing system cannot provide." In Homecrest, the first of those shows up in the HPD record before it shows up anywhere else. If the building's violation history lists several different apartments over two or three years, each one fixed and then followed by another, the stations are not the only thing wearing out. The power supply, the pairs in the riser or the panel's own electronics are usually failing underneath.

We sort it out with three questions before quoting. How many different apartments have failed in the last few years? Can parts still be bought for the panel and stations on the wall? And when the lines are tested from the cellar, how many pairs are sound? Photos of the lobby panel, the power supply and one apartment station, sent to (347) 934-8335 or on WhatsApp, usually answer the first two. The third needs a technician with a tester in the cellar, which is part of the walkthrough for a new installation, or the $250 service call when the owner wants a diagnosis before deciding.

If the answer is a repair, our Brooklyn door buzzer team handles that too, and we will say so plainly rather than sell a system. This page is about installing: a full replacement for a building whose system has run out of life, a first buzzer for a house that never had one, a new door for a cellar apartment, or a separate system for a store or office.

Door Buzzer Installation for Homecrest's Architecture

Six kinds of building make up nearly every buzzer installation we plan in Homecrest. They differ in where the old wire runs, how many doors people use, who has to approve the work and how the cable can reach each household without opening finished walls.

Walk-ups of the 1920s: a hundred-year-old pair and a station that has been painted over five times

Homecrest's oldest apartment buildings went up in the 1920s. Their entry systems have been replaced more than once, but the wire usually has not. Each apartment's pair runs from a terminal block in the cellar, up a chase beside the stair or behind the public hall wall, to a box in the apartment's foyer or kitchen. Over the decades the boxes have been reused for every new generation of station, and the stations themselves have been painted over along with the walls they hang on.

That gives a walk-up two kinds of fault at once. Some lines are electrically bad: cracked insulation where the pair passes a radiator riser, a splice in a ceiling that somebody made with tape, a pair cut during a kitchen renovation and twisted back together. Others are fine electrically, but the station's speaker is under layers of paint and the household cannot hear it. HPD records both as a broken intercom. Telling them apart takes a pair test from the cellar to each apartment, which is the first thing we do on every walk-up installation, and it decides how many lines can be reused.

Where pairs pass, a two-wire system runs on them; Aiphone describes its GT Series as built for "new builds and retrofit projects" and notes the advantage of "using existing wire and infrastructure." Where they fail, new cable goes up the same chase or, if that is blocked, up a painted raceway in the public hall, which is far cheaper than opening plaster in every apartment. In buildings this old, the written price names each failing line separately, so the owner sees exactly what the new cable is for.

One more point applies to the walk-ups in particular. HPD's guidance on lead-safe work says that in buildings put up before 1978, work that disturbs 2 square feet or more of paint in a single room should follow lead-safe work practices. Mounting a station over an existing box disturbs very little paint, and we plan walk-up jobs to stay that way, with surface raceway rather than channels cut into old plaster. Where a job would cross that line, the owner knows beforehand, and that part of the work goes to a contractor with the right certification.

Mid-century elevator co-ops: sixty apartments, one panel, and a board that wants the whole picture

The six-story elevator buildings of around 1960 are the co-ops most Homecrest shareholders live in. Brick Underground's neighborhood guide describes examples on East 13th and East 14th Streets with 64 and 66 apartments, elevators, live-in supers and, in one case, an upgraded lobby and security system. Their intercoms usually date from either the original construction or a replacement in the 1980s or 1990s, and the apartment stations are often recessed into the foyer wall in a metal box sized for the original handset.

In these buildings the decision belongs to the board, and the board needs more than a price. It needs to know how many lines pass their test, what the new apartment stations will look like over the old recessed boxes, how long the lobby will be without a working panel (it should never be without one) and what the system will cost to keep running. We give the board a line-by-line test result, a sample of the station and trim plate, a schedule that installs the lobby side first, and a quote that shows any subscription beside the hardware, so the vote is about the building and not about guesses.

The live-in super matters too. We walk the building with the super before quoting, and leave the labeled wiring record afterward, because the super is the first person a tenant calls when a station stops working.

Condos on Ocean Avenue: the system came with the building

The condominiums along Ocean Avenue, such as the eight-story building from 2006 and the eight-story, 16-apartment building that opened in 2019, came with modern panels picked by their developers. Their problems are rarely wiring. They are accounts and contracts: the admin login belongs to someone who no longer manages the building, the app subscription renews without anyone reviewing it, or the panel's maker has moved on to a new model.

Two-families on the side streets: one door, two households, one bell in the wrong place

Homecrest's side streets are full of two-family houses, many of them renovated or rebuilt much larger than the houses they replaced. The usual entry problem is simple: a single bell by the front door that rings in the downstairs hall, so whoever lives upstairs either hears every visitor for both apartments or hears nothing at all, and either way walks down to open the door.

The fix is a two-button station at the door, an answering unit with a release key on each floor, a fail-secure strike in the door frame and a small battery-backed power supply in the cellar. Each button rings only its own household, each household opens the door for its own visitors, and the door locks again behind them. This is the bottom of our Brooklyn list, $400 to $900 for audio or $700 to $1,800 for video, depending on the station and how the cable reaches the second floor.

One-story rows and bungalows: the side door and the shared driveway

South of Avenue V the houses get lower and closer together. Rows of one-story brick houses share community backyards and driveways, and bungalows sit on narrow lots. In these houses, the front door is rarely the problem. The question is the second door: a side or rear door onto the shared driveway that a cellar tenant, a relative or the household itself uses every day.

Anything mounted for that door goes on the house's own wall or door frame, never on the shared ground or a neighbor's fence, unless every owner who shares it has agreed in writing. A single-button station by the side door, an answering unit inside, and a strike on the door frame cover it; if the front door also needs a station, both can ring the same indoor unit with different tones.

Shop buildings on the avenues: two systems that should never meet

On Kings Highway, Avenue U, Coney Island Avenue and Neck Road, the typical building has a store on the ground floor and two or four apartments, or an office, above a narrow door beside the shopfront. The apartments need a small entry system of their own; the store may want a buzzer at its side or rear door for deliveries. We keep the two completely separate, with their own panels, power and releases, so nobody in the store can open the apartments' door and no tenant can let a stranger into the store.

HPD treats the apartments' side of these buildings exactly as it treats a walk-up: in 2023 it wrote a class B violation for the "building entrance intercom at public hall, 1st story" of a Kings Highway building. The fact that a store occupies most of the frontage does not change the duty to the apartments upstairs.

Fourteen Notices at One Address: How Homecrest Buildings Fail One Apartment at a Time, and Why a Full Installation Ends the Cycle

HPD's violation records for the Gravesend (East)-Homecrest area tell a story that anyone who has managed an older building will recognize. Between January 2023 and November 11, 2026, inspectors wrote 35 intercom violations in the area. Fourteen of them were at one building on Ocean Parkway. They were not 14 copies of one complaint. They named apartment A2, then A52, then A55, B5, C2, C21, C61, D4, D21, D35 and D54, across four sections and six stories, and some apartments more than once. The most recent, dated November 6, 2026, orders the owner to "properly repair or replace the broken or defective return bell buzzer intercom system from the building entrance door to the apartment wall panel."

Read the statuses beside those violations and the cycle becomes clear. Several are marked closed or dismissed: an apartment's station was fixed, or the inspector found it working on the return visit. Then another apartment was cited a few months later. The owner was not ignoring the system; it was being repaired one apartment at a time while the rest of it kept aging. That is the most expensive way to own an old intercom, because every repair is a separate visit, a separate violation and a separate tenant left without a working station while it waits.

Other buildings in the area show the same shape on a smaller scale. A Gravesend Neck Road building was cited three times between 2023 and 2025, for a basement apartment and then a cellar apartment. An East 13th Street building was cited twice in 2024 for the same second-floor apartment, first for a station that did "not return buzzer" and then for an "inoperative intercom system." Statuses elsewhere include "not complied with" for buildings on Coney Island Avenue and East 13th Street, and "first no access to re-inspect" where the inspector could not get back in.

What actually fails in a building that fails this way

When failures move around a building, four things are usually wearing out together. The power supply loses capacity and the stations farthest from it go weak first. The pairs in the risers develop faults where they pass hot pipes, damp walls or old splices. The panel's call buttons and relays wear unevenly, so some apartments ring and others do not. And the apartment stations themselves, many decades old, fail one by one. Replacing a station fixes only the last of those four, which is why the next violation arrives somewhere else.

ButterflyMX's repair guide lists the symptoms that go with each part: "Continuous buzzing may indicate a stuck button or another entry-panel issue"; "No audio or one-way audio may point to an apartment station, audio path, connection, or shared-equipment fault"; "Static, humming, or intermittent calls may indicate wiring or interference problems"; and "A door that does not release may involve a relay, power supply, electric strike, magnetic lock, or the door hardware itself." A building whose tenants report all of those in different apartments is a building where the shared parts are failing.

How a full installation breaks the cycle

A full installation replaces the shared parts and tests every line once, together. The new lobby panel and power supply go in first. Every pair is tested from the cellar; the sound ones carry the new system and the failing ones get new cable. Every apartment gets a new station, mounted where the household answers. At the end, every apartment is called from the street side of the door and released while the door is watched relocking, and the results go on a dated test sheet with the apartment numbers HPD uses.

That sheet is what changes the owner's position. When the next tenant complaint comes in, the owner can show that the station was installed and tested on a given date and that every other apartment passed with it, and the managing agent knows to look at that one station rather than the whole building. When a co-op board budgets for the following year, it is budgeting for a system with a known start date rather than for a stream of repair calls.

Compared with the repairs it replaces, it is often the better use of the money. A building of sixty-odd apartments sits inside our $2,500 to $10,000-plus building range, and where it lands depends mostly on how many lines pass their test and whether residents want video. Against several years of single-station visits, each with its own violation and its own wait, the full installation is usually the cheaper path, and it is the only one that ends with every apartment working at the same time.

Which Homecrest Buildings Must Have a Buzzer, What It Has to Do, and How Doors and Paint Come Into It

Homecrest's housing runs from one-story houses that no entry rule touches to co-ops with more than a hundred apartments. These are the rules that decide what an installation has to deliver, in plain terms. They are not legal advice; an owner facing a violation or a tenant dispute should talk to their own lawyer or managing agent.

Larger buildings need a talk-and-release system. New York's Multiple Dwelling Law §50-a says that every Class A multiple dwelling erected or converted after January 1, 1968, with eight or more apartments, must have a self-locking main entrance door and an intercommunication system that lets a resident talk with a visitor and release the door from the apartment. For older buildings, which in Homecrest means nearly all the 1920s walk-ups and the elevator co-ops of around 1960, the owner must install the door and the intercom when the tenants of a majority of the apartments request it in writing, starting within 90 days and finishing within six months.

Once there is a system, it has to work. Every violation in the area's record cites the city's housing maintenance code, section 27-2005, which puts the duty to keep the building's systems in good repair on the owner. That applies to each apartment's station, which is why HPD writes violations apartment by apartment. One 2024 violation in the area cites a "tele communication intercom system from the building's vestibule to tenant's tele devices," a reminder that a system which answers on residents' phones carries the same duty as one with wall stations.

Video is a choice, not a requirement. ButterflyMX's guide to New York intercom law notes that the statute "does not, by itself, require video, mobile access, or remote management." Voice and remote release are the legal core. Video is worth paying for in many Homecrest lobbies, but it should be chosen on its merits.

Violations come with deadlines. The same guide sets out HPD's correction periods: 90 days for a class A violation, 30 days for class B and 24 hours for most class C. Nearly all the intercom violations in the area's recent record are class A or class B. An owner planning a full installation to clear a class B violation should tell us its date at the first contact, so the walkthrough, the equipment order and the installation can be scheduled inside it.

The door matters more than the buzzer. Self-closing door violations outnumber intercom violations in the Gravesend (East)-Homecrest area by about 25 to 1 since 2023: 361 in 2023, 344 in 2024, 378 in 2025 and 289 in 2026 through November 11. A new buzzer on a lobby door that does not shut and latch by itself is a release for a door that was already open, so every building installation we quote includes a check of the closer, the latch and the strike.

Everyone must be able to get out. A buzzer-controlled door still opens from inside without a key, a code or special knowledge. With an electric strike, Allegion notes, people inside leave by turning the lever whether the strike is fail safe or fail secure. Magnetic locks are different: they hold the door only while powered, so the building code requires a release sensor on the inside, a push-to-exit button and release on power loss and fire alarm activation.

Buttons within reach. The 2010 ADA Standards set the high forward reach at 48 inches and the low at 15 inches, and require operable parts to sit within those ranges. We mount lobby panels with their buttons inside that band, which also suits residents and visitors who use wheelchairs or walkers.

Door Buzzer Installation in Homecrest: Questions Answered

Questions Homecrest owners, co-op boards and residents bring to us, plus ones raised in ButterflyMX's repair guide, Brick Underground's intercom guide and the city's own records, answered for the buildings here.

Reading a building's record

HPD has cited three different apartments in our building for dead intercoms within a year. Does that point to the stations, the wiring or the panel?

Usually to something the apartments share. Three separate stations failing in a year can happen by chance in a building with sixty old stations, but if the three are in different lines and on different floors, the first suspects are the power supply and the panel, and the second is the wiring in the risers. A tired power supply makes the farthest stations go weak first; a failing panel drops some calls and not others.

We check in that order: the power supply's output under load, the panel's call circuits, then each pair from the cellar. If the shared parts test well and only those three stations are bad, a repair makes sense. If the shared parts are failing, replacing stations one at a time will keep producing violations, and a full installation is the better plan.

Tenants' 311 complaints keep closing with no violation because the intercom happened to work when HPD came. How do you find a fault that comes and goes?

By testing under the conditions in which it fails. Intermittent faults in old buildings usually come from three places: a power supply that sags when several stations are in use, a pair with damaged insulation that shorts when the wall is damp or the heating pipes are hot, and a loose connection in a splice or terminal block. Each can pass a quick test on a dry afternoon.

We load the power supply, test each pair with a meter rather than just listening, check the terminal block for corrosion and loose screws, and ask the tenants who complained when it fails. If the pattern is weather or heat, the suspect is the cable; if it is busy times, it is the power. The finding goes on the written price, and the full installation replaces or retests the part responsible.

HPD cited the intercom in our building's cellar apartment. Does a new system have to include that unit?

If people live in the apartment and it is on your list, the new system should include it, with a tested line, a station in the apartment and a button or directory entry on the panel. HPD writes intercom violations against occupied apartments, including basement and cellar units, as the Gravesend Neck Road citations in the area's record show.

Whether the unit may be occupied is a separate question for the owner and the Buildings Department, and Homecrest's community district is outside the city's basement legalization pilot. We install for the apartments the owner lists in writing; if the owner later takes a unit out of use, we remove its button and mark its line out of service.

Inside the apartments

The old stations in our 1960s co-op sit in recessed metal boxes in the foyer walls. Will the new stations cover those openings cleanly?

Yes, with a trim plate sized to the old box. Modern stations are usually smaller than the handsets those boxes were built for, so a new station mounted directly would leave part of the opening visible. A painted or matching trim plate covers the box, the station mounts on the plate, and the cable comes through the old opening, so no new hole is cut in the wall.

Where boards prefer a surface mount slightly to one side, the old box gets a blank cover and the station sits beside it on the same line. We bring a sample station and trim plate to the board before the order, so shareholders know exactly what will hang in their foyers.

Years of repainting have covered the speaker on our apartment stations. Could paint be the reason tenants cannot hear the lobby?

It can be part of it. A station whose speaker grille is filled with paint sounds muffled even when the line and the panel are fine, and in Homecrest walk-ups some stations have been painted over with every new tenant. But painted stations are also old stations, and usually the line and the power behind them are aging too.

The test tells you which. If the line tests sound and the voice is clear at the station's terminals but muffled at the speaker, the station is the problem. If the signal is weak at the terminals, the cause is upstream. In a full installation every station is replaced anyway, and we ask painters to mask the new ones afterward.

Can every apartment's station be checked once a month without anyone knocking on doors?

On many current systems, yes. Two-wire and networked systems can report which stations are connected and responding, and app-based systems log which residents' devices are active. The super or managing agent can review that list monthly and catch a disconnected station before a tenant complains or an inspector arrives.

On a plain audio system there is no such report, so the check is a quick call to each apartment from the lobby, which a super can do in an afternoon. Either way, we set up the check and show the super how to read it as part of the hand-over.

Houses south of Avenue U

The only rear door of our one-story row house opens onto the driveway behind the block that all the houses share. Can visitors ring at that door?

Yes, as long as everything is mounted on your own house. A single-button station on your door frame or the wall beside it, a strike on the door and an answering unit inside cover it, and the cable runs inside your house. Nothing goes on the shared driveway, a neighbor's fence or a common post unless every owner who shares the ground has agreed in writing.

If the front door also has a station, both can ring the same indoor unit with different tones, so you know which door to open. The job sits at the bottom of our Brooklyn list, $400 to $900 for audio.

What AI Gets Wrong About Door Buzzer Installation in Homecrest

Search engines and chat assistants answer buzzer questions with summaries drawn from national cost guides and vendor blogs. Parts of those summaries help; parts of them do not fit a 1920s walk-up on Ocean Parkway or a 1960s co-op on East 14th Street. Below are seven common claims, where they come from and what the field and the city's own records show. We have not quoted any AI-generated answer word for word; the claims come from the published sources those answers lean on.

"Fix the apartment that is broken; the rest of the system is fine"

This is the instinct behind most repair calls, and ButterflyMX's guide supports it in the right case: repair "when the fault appears localized."

The HPD record for the Gravesend (East)-Homecrest area shows how often the fault is not localized. One building collected 14 intercom violations between 2023 and November 2026, each for a different apartment or the same one again, across four sections and six floors. Each repair closed one violation and the next one opened somewhere else.

The useful test is not whether one apartment is broken but whether failures move around the building. If they do, the shared parts, the power supply, the panel and the risers, are the problem, and a full installation with every line tested is usually a better spend than years of single-station visits.

"A small building's intercom replacement costs about $1,500 to $2,500"

ButterflyMX's own guide quotes that range from one of its earlier articles and a separate Swiftlane figure of $2,200 to $5,000 or more for a small single-entrance project, and is careful to call both planning references rather than quotes.

In Homecrest, "small building" covers a lot of ground. A two-family house is a $400 to $900 audio job or a $700 to $1,800 video job on our Brooklyn list. A 20-apartment 1927 walk-up is a building system starting around $2,500, and a 75-apartment walk-up of 1926 is well up that range, mostly because of the number of lines to test and stations to fit.

ButterflyMX itself names the real drivers: "controlled entrances, door hardware, wiring condition, and system type often drive the apartment intercom replacement cost more directly" than apartment count. That matches what we see. Two buildings of the same size can be thousands apart because one has sound pairs and a good lobby door and the other has neither.

"The average intercom installation costs $2,500"

HomeAdvisor's national guide gives that average, with a range of $1,500 to $15,000 and an estimate of one to two hours of labor per station.

The per-station figure is the part worth keeping. In a 60-apartment co-op, an hour or two per station plus the lobby, the power and the testing adds up to several days of work, which is why the building lands well above a national average built mostly from houses.

The national average says nothing about the door. In this area, where self-closing door violations outnumber intercom violations about 25 to 1, the closer and strike on the lobby door are often part of the job and part of the price.

"Old buzzer wiring is obsolete and should be replaced"

Summaries often assume decades-old bell wire has to go.

Brick Underground's NYC intercom guide says older systems may be outdated while the core wiring is typically fine, and Aiphone's upgrade guidance says "if the existing wires are in good condition, they can be reused." In a Homecrest walk-up, reusing sound pairs avoids opening plaster in apartments where paint may be decades old.

The key word is "good condition," which only a test can establish. A century-old pair can be perfect or can short every time the radiator riser beside it gets hot. We test each one, reuse the sound ones and price new cable only for the ones that fail.

"Replacing a building's intercom takes a day or two"

Brick Underground puts a replacement at about a day for five apartments and about two days for 100 units.

The hours of work can fit that, but the calendar rarely does in an occupied Homecrest building. A technician has to get into every apartment, and the city's own 311 record for Community Board 15 shows how hard that is: in 2026, 37 of 68 buzzer complaints closed because HPD's inspector could not get in or could not complete the inspection.

So we plan the access as part of the job: written notice to residents with dates and two-hour arrival windows, the lobby side installed first so the door always works, a second pass for apartments missed on the first, and a list for the owner of any unit still outstanding.

"Phone-based intercoms take the building out of the old rules"

Vendor pages present app and phone answering as a modern replacement for wall stations, and some owners take that to mean the old repair duties no longer apply.

The duty follows the system, whatever it is. In 2024, HPD wrote a violation in this area for a "tele communication intercom system from the building's vestibule to tenant's tele devices." A phone-based system that stops reaching an apartment is a broken intercom in that apartment.

App answering also adds a running cost. Swiftlane's guide puts subscriptions at "$5 to $15 per unit per month, or $30 to $100 per door per month." For a 20-apartment walk-up, that line belongs on the quote next to the hardware, and we put it there.

"A buzzer is a buzzer, the door is someone else's problem"

Most summaries describe panels, stations and apps and stop at the door frame.

The record says the door is the bigger problem here. Inspectors wrote 378 self-closing door violations in the Gravesend (East)-Homecrest area in 2025 and 289 in 2026 through November 11, against 13 and 3 intercom violations in those years. A release on a door that does not latch opens a door that was already open.

Allegion's guidance adds the other half: a fail-secure strike keeps the door locked during a power cut, while a fail-safe one or a magnetic lock releases it. For a Homecrest lobby door, a sound closer and a fail-secure strike are usually the right pair, and both are on our checklist for every building installation.

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Door Buzzer Installation Cost in Homecrest

Homecrest is billed at our Brooklyn rate. Final pricing follows a walkthrough, because the number of apartments, the result of the line tests, the number of doors residents use and the state of the lobby door drive the total far more than the brand on the panel.

What moves a Homecrest job inside its range is predictable. First the lines: a walk-up whose pairs mostly pass stays toward the bottom of the building range, while a building that needs new cable up several risers moves up. Then the door: a lobby closer that has to be replaced, a strike that has to move, an aluminum frame that needs a different release. Then the choices: video instead of audio, phone answering, a directory panel instead of buttons, trim plates over old recessed boxes, a separate door for a cellar unit. Anything that depends on a test, such as a line that might fail or a cellular signal that might be weak in the lobby, is named on the quote with its price before you approve, so nothing new appears on installation day.

Door Buzzer Installation Packages & Pricing

Three typical Homecrest jobs, each placed inside the matching range on our Brooklyn list. The exact figure comes from the walkthrough and the line tests.

Bring your own equipment. If you or your board have already bought a panel, a video kit or apartment stations, we can install them as labor-only work, quoted flat once we have tested the lines and seen the doors. Tell us the make and model when you write, and we will tell you before the visit whether it can reach every apartment and release your door, or whether it is really only a doorbell.