Our Services
Last updated October 2026 by the Douglas Security System team, licensed and insured NYC intercom specialists with over 35 years of experience.
Douglas Security System (DSS) repairs and installs intercoms, security cameras, access control systems, smart locks, roof alarms, and door strikers, and we run network cable throughout the tri-state area. We’ve been doing this work in New York for over 35 years, from our office at 1541 E 46th Street in Brooklyn.
Most of our calls come from property managers, co-op boards, landlords, and homeowners who need something fixed fast or want to upgrade an old system. We handle both. Every job starts with a free quote, and we only recommend a replacement when a repair doesn’t make sense for your building.
Below you’ll find each service we offer, the brands we install, how our process works, and answers to the questions we hear most. For prices and legal requirements, see our intercom cost guide and NYC intercom requirements. If you’d rather talk to someone, call us at (212) 262-2820.
| If this is your situation | Start here |
|---|---|
| The buzzer does not ring or the door will not open | Door buzzer repair |
| The intercom is not working or is unreliable | Intercom repair |
| You want a new video intercom for a building, house, or office | Video intercom installation |
| You have an audio system and want video without rewiring | Audio-to-video upgrade |
| You want to avoid monthly fees | No monthly fee intercom systems |
| You want to know what an intercom costs | Intercom cost guide |
| You are not sure what the law requires | NYC intercom requirements |
A dead buzzer or a lobby panel that won’t release the door is more than an inconvenience. Tenants can’t let in guests or deliveries, and the building may be out of compliance. Under the NYC Housing Maintenance Code, buildings with eight or more apartments built or converted after January 1, 1968, must keep a working intercom. It also needs two-way voice and door release. That’s why we treat intercom repair calls as urgent.
We repair existing intercoms of every age. That also includes older 5-, 4-, and 3-wire audio systems, Aiphone GT and IP series, Comelit, Elvox, Leedan, and 2Easy systems. The most common problems we fix are:
A DSS technician tests the system from the entry panel to the apartment units. Next, the technician finds the failed part and gives you a price before any work starts. Most single repairs, like replacing one apartment unit or fixing a door release, cost about $250 to $600. Replacing an entry panel or power supply usually runs $500 to $1,500. These are average NYC prices, but your final price depends on what we find. We carry common parts like the PK-543A intercom amplifier and handset-style apartment stations. As a result, we finish many repairs in one visit. Read our full guide to intercom repair in NYC.
Buzzer ringing but the door won’t open? See door buzzer repair in NYC.
When the intercom goes down, a few quick checks help us fix it faster:
In the meantime, put up a note with a phone number so visitors and deliveries can still reach tenants.
Is your intercom old, always breaking, or audio-only? Then an upgrade usually costs less over time than repeated repairs. We install brand-new video intercom systems, both Wi-Fi and hardwired. We do this in apartment buildings, co-ops, offices, and private houses.
For many buildings, we can upgrade to video without new wiring. Our Comelit video intercom works alongside your existing intercom units. So tenants keep their apartment units, and they can also see and talk to visitors on their cellphones. That way, the job stays faster and more cost effective.
With a modern system, you and your tenants get:
Most of our Comelit systems are a one-time investment with no monthly payment. On Comelit video intercom installs, we offer a 3-year guarantee on Comelit material. We also give a 1-year guarantee on service and labor. Besides Comelit, we install Aiphone GT Series multi-tenant systems, DNAKE smart intercoms, Akuvox, and ButterflyMX. See the Comelit Ultra Touch entry panel and our full intercom product list.
See our full guide to video intercom installation in NYC.
No two buildings need the same system. So before we recommend anything, we look at a few things. We check how many units you have, how old the wiring is, and who uses the entrances. We also ask how you want to manage access.
If you’re not sure what fits, we’ll walk the property with you. Then we’ll explain your options in plain words, with prices for each.
We install HD and IP camera systems for residential houses and commercial properties. A good camera system helps you see who comes and goes and check on deliveries. It also lets you hand clear footage to the police or your insurance company if something happens.
We plan every camera system around your property. First, we walk the site. We pick camera spots for entrances, lobbies, hallways, parking areas, and storefronts, and we choose the right lens for each view. Then we run the cable, mount the cameras, set up the recorder, and connect everything to your phone.
Some buildings need more. For those, we install cameras with human and vehicle detection. We also install facial recognition with a compatible NVR, like the PAR 4MP turret camera and the PAR 2MP bullet camera. We also install Invid security camera systems.
Access control lets you decide who gets in, and when, without handing out keys. It’s a good fit for apartment lobbies, office suites, storefronts, gyms, and busy back doors.
We install and repair keypads, key fob readers, card readers, and door strikers. When it makes sense, we also connect them to your intercom. With a keypad like the Aiphone AC-10S, you can set up to 100 codes. With a cloud system, you can add or remove users from your phone. You can also see a log of every entry.
We work with Linear access control systems, DoorKing entry panel systems, ButterflyMX, and Aiphone access products. Say a key fob is lost or a tenant moves out. Then we can turn off access in minutes instead of changing the locks.
We install security locks and smart locks for apartments, offices, and retail spaces. That includes keyless electronic door locks like Yale NexTouch. They combine a modern look with the durability a busy multi-family or mixed-use property needs.
Smart locks let you use a PIN code instead of a key. You can give temporary codes to cleaners or contractors, and you can stop worrying about copied keys. We also install and replace door strikers and magnetic releases, so your intercom, keypad, and lock all work together.
Intercoms, cameras, and access control all depend on good wiring. We run network cable for new systems. We also replace old cable when it causes problems. We install both Wi-Fi and hardwired systems. Where we can, we use PoE (Power over Ethernet), so one cable carries both power and data.
Clean, labeled cabling makes your system more reliable. It also makes repairs much easier later. We handle the wiring in apartment buildings, offices, storefronts, and private houses across the tri-state area.
We don’t push new systems when a repair will do. Here’s how we help you decide:
When it’s a close call, we’ll give you both prices. Then you can choose what fits your budget.
We install, repair, and upgrade systems from all of the brands below, so you’re never locked into one manufacturer.
We work on private houses, office spaces, storefronts, apartment buildings, co-ops, condos, and commercial properties. Many of our customers are also property managers who look after several buildings. They call us because we show up, explain the problem in plain words, and fix it.
Maybe you manage a large apartment building in Queens. Maybe you own a two-family house in Brooklyn. Either way, you still get the same DSS technicians and the same free quote. Read what our customers say on our homepage, or learn more about DSS.
Property managers and building owners have plenty of choices in New York. Here’s why many of them have worked with DSS for years:
DSS is headquartered in Brooklyn and serves all five boroughs: Manhattan, Brooklyn, Queens, the Bronx, and Staten Island. We also work across Long Island and the rest of the tri-state area. See all of our service areas.
We know the building types here. They range from pre-war walk-ups with decades-old wiring to new condo buildings that want app-based entry. Because of that local experience, we find problems faster. We also recommend systems that fit how your building is actually used.
We can only give you an exact price after we inspect the work. Every building is different. The price depends on the number of apartments and entrances. It also depends on the age and condition of the wiring, the door hardware, and the equipment you choose. Two buildings with the same number of apartments can need very different work. So a price given over the phone would be a guess.
That’s why every job starts the same way:
The price ranges on this site are average NYC prices from published installer pricing. They give you a starting point, but they are not a DSS price list. Call (212) 262-2820 to schedule an inspection.
We repair and install intercoms, video intercoms, security cameras, access control systems, security locks and smart locks, and network cabling. We work on homes, apartment buildings, offices, and storefronts across NYC and Long Island. Repair work covers dead door releases, failed panels, and tired wiring. New installations include keypads, key fobs, and card readers for controlled doors, plus cabling to carry the signal for cameras and intercoms.
Most single intercom repairs in NYC, like replacing one apartment unit or fixing a door release, cost about $250 to $600. Replacing a part such as an entry panel or power supply usually runs $500 to $1,500, and a dead lobby panel with a new transformer runs about $1,200 to $2,800. A diagnostic visit averages $150 to $300. These are average NYC prices. We give you a free quote after we inspect your system.
Call us as soon as the problem starts. We treat a broken intercom or door release as urgent because tenants can’t get in, and we schedule a technician as quickly as we can. We carry common parts, so many repairs are finished in one visit. Early calls help, since a failing amplifier or loose connection can grow into a bigger fault. Tell us the symptoms: no sound, no buzzer, one apartment, or all of them.
Yes, in many buildings. Our Comelit video intercom works alongside your existing intercom units, so tenants keep their apartment units and can also answer the door from their cellphones. Reusing the wiring that already runs to each apartment avoids opening hallway walls and keeps disruption low for residents. Whether it works in your building depends on the type and condition of those old wires, which we check during the inspection before giving you a quote.
No. Our Comelit systems are a one-time investment with no monthly payment. Property management software and call-log servers are optional and sold separately. Some cloud intercoms charge a recurring subscription for hosted service, which is where the monthly-fee worry comes from. With Comelit you can skip the extra software and still have a fully working system. Add it only if your manager wants something like a record of which apartment was called and when.
We work with Aiphone GT and IP series, Comelit Ultra Touch, DNAKE, Akuvox, ButterflyMX, DoorKing, Linear, Leedan, Elvox, and 2Easy systems. That range covers older audio panels as well as newer IP and app-based units. For repairs, we first identify the make and model of your entry panel and apartment stations, because parts and wiring differ from brand to brand. For new installations, we install Comelit, Aiphone, and DNAKE.
Yes. We install HD and IP camera systems for private houses, apartment buildings, offices, and storefronts, with remote viewing from your phone and cloud storage options. IP cameras send video over network cable, and the same cable can often carry power, which makes placement easier. Camera positions matter most. Lobbies, entrances, and mailrooms need different angles and lighting than a store counter or a driveway, so we plan the views before mounting anything.
Yes. We can connect keypads, key fob readers, and door strikers to your intercom, so visitors call from the entry panel while tenants and staff use a code or fob. Both paths end at the same door release, so the strike is wired to respond to either signal. Fobs have one clear advantage: a lost one can be deactivated alone, while a shared code must be changed for everyone.
We serve all five boroughs (Manhattan, Brooklyn, Queens, the Bronx, and Staten Island), Long Island, and the tri-state area from our office at 1541 E 46th Street, Brooklyn, NY 11234. Rules change outside the city. The NYC intercom rule does not apply directly on Long Island, where local town or village codes and state codes govern. Coverage on Long Island means Nassau and parts of Suffolk.
Yes. Many of our customers are property managers and co-op boards who look after several buildings. We handle repairs, upgrades, and new installs, and we give each building its own quote. Separate quotes make sense because each address has its own wiring age, apartment count, and number of entrances. They also let a board approve work one property at a time and compare costs between buildings.
Yes. On Comelit video intercom installs, we offer a 3-year guarantee on Comelit material and a 1-year guarantee on service and labor. For other jobs, we explain the warranty that comes with the parts we install before we start. In practice, a defective Comelit part falls under the 3-year term, while a problem with workmanship, such as a loose connection we made, falls under the 1-year term.
Call (212) 262-2820 or send us a message with the form on this page. Your final price depends on an inspection of your wiring, entry panel, and door striker. Those three items drive most of the cost, since damaged wiring or a failed panel can turn a small repair into a larger one. After the visit, the written quote is free, and work begins only once you approve it.
Yes. Douglas Security System is licensed and insured, and our technicians install and repair intercom, camera, and access control systems across NYC and Long Island. That matters because this work touches building power, door hardware, and shared hallways. Co-op boards and management companies often want that coverage in place before anyone enters a building. The company also has more than 35 years of intercom and security work in New York, and its technicians hold certification.
We can share average NYC price ranges over the phone, but we can only quote an exact price after we inspect the work. The price depends on the number of apartments and entrances, the condition of the wiring, the door hardware, and the equipment you choose. For reference, a diagnostic visit averages about $150 to $300 in NYC; that is an average, not a quote. After the inspection, you get a free written quote and you approve it before any work starts.