Apartment Buzzer: Your Complete Buyer’s Guide for 2026

Also known as an apartment intercom system, apartment buzzer systems are installed worldwide. Most commonly seen in big cities, apartment buzzers enable tenants to open the building’s front door for guests without leaving their apartment. But how do they work, and how do you buy the best video intercom system for your building?

Below, we’ll explain:

• What is an apartment door buzzer
• Types of apartment buzzer systems
• How an apartment buzzer works
• How to use an apartment buzzer
• Connect an apartment buzzer to a phone
• How much does an apartment buzzer system cost?
• Replacing an apartment buzzer
• Alternatives to apartment buzzers
• Apartment buzzer FAQs

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What is an apartment door buzzer?

An apartment buzzer is a building entry system that allows visitors to alert residents and enables residents to unlock the front door remotely, typically through an in-unit intercom or phone connection.

Apartment buzzers achieve two things:

1. They alert tenants to a visitor
2. They enable tenants to open the door for visitors from their units

Door buzzer systems can also be used in commercial buildings and offices. Like apartment buzzers, commercial door buzzers empower visitors to communicate with building tenants. Tenants can then grant access to their visitors — from delivery couriers to business associates to prospective employees — without leaving their desks.

Types of apartment buzzer systems

There are several types of apartment buzzer systems, each offering different levels of convenience, security, and property management functionality. The best option depends on your building’s size, existing wiring, access needs, and whether you want basic visitor entry or a more modern access control solution.

Types of apartment buzzer systems include:

• Traditional wired apartment buzzers
• Telephone entry systems and call boxes
• Wireless apartment buzzer systems
• Smart video intercoms

Traditional wired apartment buzzers

Traditional wired apartment buzzers connect each apartment unit to the building’s front entrance through physical wiring. When a visitor presses a resident’s button at the entry panel, the system sends an alert to the resident’s in-unit buzzer. The resident can then speak with the visitor and press a button to unlock the door.

These systems are simple and familiar, but they often lack modern features such as video calling, mobile access, remote management, and access logs. They may also be expensive or disruptive to repair if the building’s wiring is outdated.

Telephone entry systems and call boxes

Telephone entry systems, also known as call boxes, allow visitors to call residents from an entry panel using a directory. Instead of ringing an in-unit device, the system places a call to the resident’s phone number. The resident can then speak with the visitor and press a key on their phone to unlock the door.

Call boxes are common in apartment buildings, gated communities, and commercial properties. However, they may rely on landlines, cellular service, or internet connectivity, depending on the system. Many also offer limited visibility into who is requesting access.

Wireless apartment buzzer systems

Wireless apartment buzzer systems reduce the need for extensive building wiring by using wireless signals, internet connectivity, or cellular networks to connect the entry panel with residents. These systems can be useful for retrofits, smaller properties, or buildings where running new wiring would be difficult.

However, wireless systems vary widely in reliability and functionality. Before choosing one, property managers should consider connectivity strength, power requirements, building layout, device compatibility, and whether the system can scale as access needs grow.

Smart video intercoms

Smart video intercoms are modern apartment buzzer systems that allow residents to see, speak with, and grant access to visitors from a smartphone or other connected device. Many systems also support features such as video calling, remote door unlock, virtual keys, delivery access, and cloud-based property management.

For multifamily buildings, smart video intercoms offer more functionality than traditional buzzers because they combine visitor communication, access control, and remote management in one system. As a result, they’re often the best fit for properties looking to replace outdated buzzers with a more convenient and scalable solution.

How does an apartment buzzer work?

Apartment buzzer systems include two hardware devices: one at the building’s entrance and one inside each apartment. Wiring between these devices enables communication between apartment tenants and visitors at the front door. Smart apartment buzzers even have a built-in camera, microphone, and speaker. This way, tenants and visitors can see, hear, and speak to each other.

Watch how ButterflyMX works:

Apartment buzzer hardware may include:

• Call buttons: Buzzer systems usually have multiple call buttons on the hardware at the building entryway, each assigned to a specific tenant. The call button sends a signal to the residents’ in-unit device, creating a buzzing sound in their apartment.
• A door-release button: Apartment buzzers with door-release buttons allow tenants to open the door remotely. Pressing the button unlocks the front door for a set period, allowing visitors into the building.
• A talk button: Some buzzer systems require users to hold down a talk button to engage the microphone and speak to the person on the other end.
• A listen button: Some buzzer systems require users to hold down a listen button to hear the other person.

How to use an apartment buzzer

Throughout the history of intercoms, the buzzer system has been one of the most prevalent devices in apartment buildings. If you’ve never encountered an apartment buzzer system, here’s how to use one.

Using a buzzer system as a visitor

If you visit a building with a door buzzer system, you’ll usually find the device right by the front door. In most cases, you must find the name or unit number of the person you are visiting and press the corresponding call button. You may or may not hear a buzzing sound, but the resident will hear one in their unit.

If the resident speaks to you and the buzzer system has two-way audio, you can reply by simply speaking or pressing a talk button if needed. You’ll know when the tenant has unlocked the door for you because you’ll hear a buzzing sound in your apartment. Open the door quickly because it will only remain unlocked temporarily.

Using a buzzer system as a tenant

If you live in a building with an apartment buzzer system, your in-unit device is probably mounted on the wall by your front door. When a visitor calls you, you’ll hear a buzzing sound from the device.

To speak with the visitor or ask who is there, press and hold the talk button (if your device has one). Some systems require you to hold a listen button to hear the visitor’s reply. If you want to open the door for the guest, press the door release button to unlock it for a short period. Most buzzer systems alert guests when the door has been unlocked with a buzzing sound.

Apartment buzzers eliminate two pain points for residents and guests:

1. Visitors can let tenants know they are at the front door without needing the resident’s phone number
2. Residents can open the front door for guests without going downstairs or leaving their apartment

How to connect an apartment buzzer to a phone

Traditional apartment buzzer systems were not designed for mobile access, but some buildings use workarounds or upgrades to enable phone-based entry.

If you want to connect your apartment door buzzer to your cell phone, you have three options:

1. If you have a telephone entry system, you can program your cell phone number into the system. When a visitor ‘buzzes’ your apartment, you’ll receive a call on your phone. From there, press ‘9’ to open the door for the guest.
2. If you don’t have a telephone entry system, try connecting a Nuki to the buzzer hardware in your apartment. The Nuki device lets you open the door with your smartphone by sending a notification to the app on your phone when a visitor buzzes for you.
3. If you don’t have a telephone entry system and the Nuki is not an option, consider upgrading your apartment intercom system altogether.

How much does an apartment buzzer system cost?

The cost of an apartment buzzer system depends on the type of system you choose, the size of your building, and the complexity of the installation. A basic wired buzzer kit for a small property may cost significantly less upfront than a commercial multifamily access system, but it may also offer fewer features, less scalability, and limited property management functionality.

When budgeting for an apartment buzzer system, consider these cost factors:

• Hardware. Entry panels, in-unit devices, cameras, speakers, door release hardware, keypads, card readers, and other access devices all affect the total cost.
• Installation. Labor costs vary based on the property’s layout, the number of entry points, and whether the system requires professional low-voltage installation.
• Wiring or retrofit needs. Buildings with outdated wiring may need repairs, replacements, or a retrofit-friendly system that reduces the need to run new wires throughout the property.
• Software or subscription costs. Modern apartment buzzer systems may include cloud-based software, mobile apps, video calling, remote management, access logs, and ongoing support.
• Building size and number of units. Larger multifamily properties typically require more users, entry points, credentials, and integrations than a small building with only a few apartments.

Small wired buzzer kits sold online may be sufficient for duplexes, small walk-up buildings, or single-entry properties with limited access needs. However, commercial multifamily properties usually require more than basic visitor communication. They often need scalable resident directories, remote access management, delivery access, audit trails, mobile credentials, and integrations with other property systems.

As a result, commercial apartment buzzer systems are priced differently than small consumer-grade kits. While a lower-cost wired kit may solve a simple doorbell or intercom need, a multifamily access solution is designed to support long-term property operations, resident turnover, multiple entry points, and a better access experience for residents, staff, visitors, and delivery drivers.

Replacing an apartment buzzer

Has your old buzzer broken down? Are you looking to upgrade to a more advanced apartment building entry system? Sounds like it’s time to replace your apartment buzzer.

If your old system is beyond repair or unable to meet your building’s needs, the first step is to consider your priorities. Keep in mind that the intercom will serve your residents, your property staff, and your visitors. As such, you need a system that benefits all parties.

When replacing an apartment buzzer, ask yourself:

• What is your budget for hardware and installation?
• Do you want an apartment intercom buzzer that connects with smartphones?
• Do you want a system with a camera to enable video capabilities?
• Which property access methods do you want the system to offer?

The next step is determining which entry system you want to install. You could install a new buzzer system or an entirely different type of system.

Alternatives to apartment buzzers

Traditional apartment buzzers are still common, but they offer limited functionality compared to modern access control systems. Most buzzer systems support only basic audio communication and door release, which can create friction for residents and pose operational challenges for property teams.

One major drawback is buzzer bombing—when a delivery driver or visitor buzzes multiple units in the hope that someone will grant access. This can frustrate residents and create security risks, as entry may be granted without knowing who is entering the building.

ButterflyMX provides a modern alternative to apartment buzzers by replacing in-unit hardware with a smartphone-based video intercom system. Residents can see and speak with visitors, grant remote access, and manage deliveries from anywhere, while property teams gain centralized control and visibility into building entry.

For properties with frequent deliveries, high visitor volume, or residents who expect smart technology, upgrading from a traditional apartment buzzer to a modern video intercom provides a more secure, convenient access experience.

How the ButterfluMX Video Intercom can replace apartment buzzers

• Two-way video and audio communication, allowing residents to see and speak with visitors before granting access. This helps residents verify who is at the door and reduces the risk of unauthorized entry caused by buzzer bombing or missed calls.
• Smartphone-based access control, so residents can open doors remotely from anywhere. This is especially useful for deliveries, guests, and service providers when residents are away from home.
• A cloud-based property management dashboard, giving property teams centralized control over doors, users, and permissions. Staff can update access credentials, monitor entry points, and manage building access without being on-site.
• Detailed door-entry and release logs that provide visibility into building access activity for both residents and property managers. These logs create accountability, support security investigations, and help properties better understand how their entrances are used.

Apartment buzzer FAQs

• Why are apartment buzzers considered less secure than modern systems?
• Can apartment buzzers be replaced without rewiring the entire building?

Why are apartment buzzers considered less secure than modern systems?

Apartment buzzers rely on residents answering calls without visual confirmation, which can lead to issues like buzzer bombing. Modern systems improve security by enabling video verification, remote access control, and audit trails that show who entered the building and when.

Can apartment buzzers be replaced without rewiring the entire building?

Yes. Many modern apartment entry systems, including smartphone-based video intercoms, are designed to replace traditional buzzers without extensive in-unit wiring. This speeds up upgrades and makes them less disruptive for both residents and property managers.

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