How To Install A Cluster Mailbox

A cluster mailbox is a pedestal-mounted mailbox that consists of multiple compartments, all individually locked. Often found in apartment complexes, hotel guest rooms and military bases, these pedestal units are perfect for providing mail delivery to multiple residences or locations.

The first step in installing a commercial cluster mailbox is to pour a concrete pad that meets USPS specifications. It is also important to consult with your local postmaster about placement rules before installation.

Concrete Pad

Cluster mailboxes are a common feature in apartment complexes, commercial properties, and multi-family homes. They help tenants receive their mail quickly and efficiently, while also reducing fuel consumption by allowing carriers to deliver more mail at once.

They can also reduce overall maintenance costs and save space by freeing up lobbies and hallways. With USPS-approved, high-security cluster mailboxes from US Mail Supply, you can get a cost-effective solution that meets your specific needs and provides convenience for both tenants and letter carriers.

In addition, residential and commercial cluster mailboxes come with a variety of features that improve safety, security, and efficiency. These include captive lock and parcel lockers, which allow tenants to easily retrieve packages that are too large for their individual compartments.

A captive lock means that a tenant can insert their key into the door of the parcel locker and be able to retrieve their package without having to leave the building. The letter carrier will then release the key and re-lock the parcel locker.

Parcel lockers are a feature that most USPS-approved cluster mailboxes have. These are used when the parcel is too large to fit in an individual compartment within the box but are still manageable by letter carriers.

Another advantage of the parcel locker is that it allows customers to collect their parcels in the same location as their other mail, making it easier for them to check their mail. This also helps with curbside management, as it reduces the number of times a letter carrier must go out to collect packages and reduces the amount of time he or she spends on the road.

Typically, parcel lockers are installed inside cluster boxes and are accessed through one or two easy to open master doors. These units are available in a wide variety of sizes to fit the unique needs of your property.

The concrete pad for a commercial cluster mailbox is an important part of the installation process. It must be strong enough to support the unit and keep it level. It must also meet USPS specifications and manufacturer requirements. This is especially true if the CBU is being installed next to a sidewalk.


If you’re a property manager or homeowner association looking for a way to keep your residents safe and secure, installing a commercial cluster mailbox may be the perfect solution. These units are designed to prevent break-ins, vandalism and damage.

They are available in both pedestal and freestanding styles from reputable manufacturers, such as Florence Corporation and Salsbury Industries. USPS-approved cluster mailboxes are designed to stand up to the elements and provide convenient access to mail and packages.

Increasing the use of cluster mailboxes also helps the United States Postal Service reduce carbon emissions, save fuel and improve delivery efficiency. This is especially true if a parcel locker is included with the mailbox unit.

When choosing a commercial cluster mailbox, it’s important to find one that will be easy to maintain and install, as well as have readily available replacement parts in case of any issues. It’s also a good idea to invest in a mailbox that is built to prevent break-ins and vandalism, as these issues are the most common causes of damage and breakdown.

The USPS requires all new housing developments to install a cluster mailbox for quick, efficient delivery of mail and packages. It is the most fuel-efficient delivery method, allowing postal employees to deliver to multiple homes in a single stop instead of going house-to-house.

These mailboxes are used in both residential and commercial settings, including apartment complexes, condos, condominium associations, single-family neighborhoods, and more. They are also popular in college dormitories, where they allow students to keep their belongings secure without needing to sort through the mail each time, they receive a letter or package.

In addition to being a convenient, safe and secure option for residential communities and commercial properties, commercial cluster mailboxes are an attractive amenity that can increase property values. They are also a great way to encourage residents to stay active in their communities by participating in community events and maintaining the neighborhood’s curb appeal.

The best part is that you can easily purchase and install a commercial cluster mailbox yourself! You just need the right posts, hardware and locking components.

Mounting Hardware

Cluster mailboxes are a terrific way to help the environment while also reducing the number of mail delivery stops. With fewer stops, postal services can save fuel and lower carbon emissions. This helps to create greener neighborhoods throughout the country.

A centralized cluster mailbox unit can be installed in residential communities, commercial developments and even on university campuses. These mailboxes can be used for both residential and commercial mail delivery and are a more convenient way to receive mail than individual curbside boxes.

They can also reduce the amount of time postal workers spend on their deliveries. By limiting their stops, postal employees can maximize their efficiency and get more mail delivered to customers in a shorter period of time.

USPS-approved mailboxes have a host of security features, including reinforced compartments and weather-resistant exteriors that protect packages from the elements. They can be customized to your specific needs, including parcel lockers, and feature a variety of colors and styles to complement your building’s decor.

ADA and FHA-approved mailboxes are designed to meet both governing bodies’ standards for access and safety. Cannon can guide you in selecting a mailbox that will work best for your building’s practical, aesthetic and compliance needs.

If you are installing a commercial cluster mailbox in a community that does not use the USPS for mail delivery, a private access mailbox is the ideal solution. These mailboxes require no key deposits and can be duplicated at no cost to the Postal Service. If a customer loses a key, they must return it to the post office and the USPS will replace it before reissuing the compartment.

When it comes to installing a commercial cluster mailbox, you need to be sure to choose the right mounting hardware for your project. At US Mail Supply, we offer a complete range of mailbox mounting options to help ensure you’ll find the right product for your commercial project.

We offer a variety of pedestal and standard outdoor style mailboxes that are ready to be mounted on the post of your choice. These mailboxes are made from durable powder-coated aluminum so you can enjoy a long lifespan without the worry of rain rusting your unit.


Cluster mailboxes are becoming increasingly popular as a way to reduce the number of individual roadside mailboxes. They offer a number of benefits, including security and convenience. They also help to reduce traffic and the amount of time residents need to drive to pick up their mail.

They come in a variety of styles and materials and are usually customized to match the aesthetics of a building or neighborhood. They are also durable and secure, making them an excellent choice for a wide range of residential and commercial applications.

A commercial cluster mailbox is a multi-unit, centralized mailbox that has several locked compartments. Each compartment has its own lock to ensure that only the owner of the unit can access the contents. This is a great way to prevent theft and maintain your privacy.

You can install a commercial cluster mailbox yourself with the right tools and a little practice. However, it is important to know that it is against the law for you to damage the locks or the mailbox itself in any way. This is especially true if you are not a trained locksmith.

Before you begin, it is important to determine who owns the cluster mailbox. This will help you determine who is responsible for repairing it should the mailbox become damaged.

The mailbox is usually owned by the property or building owner, so you can contact them directly if you have any questions. Some are installed privately by the homeowner association, property manager, or the owners themselves. In these cases, the resident makes arrangements for the property owner to provide them with their keys to access their mailboxes.

Once you have determined who owns your mailbox, you will need to find out what type of lock it has. Most residential cluster mailboxes use a combination of key and numerical identification for each compartment.

This allows the USPS carrier to place letters and larger packages inside the proper compartments and then close them up. The carrier then leaves a parcel locker key inside the letter compartment.

When a recipient opens their mailbox, they need to insert the parcel locker key into the lock of the compartment in order to access their package. Once the package is retrieved, they need to leave the key inside of the lock and wait for their next delivery from the USPS carrier.