Cluster Mailboxes for Sale - USPS Approved

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Are you looking for the right cluster mailbox to fit your needs? We can help! We offer a wide selection of USPS-Approved CBU mailboxes at the lowest prices for your next commercial or residential project.

What is a Cluster Mailbox?

A cluster mailbox or cluster box unit (CBU) is a free-standing, pedestal mailbox with 8, 12, 13, or 16 individually locked mailbox compartments and up to 2 integrated parcel lockers approved by the U.S. Postal Service.

Since all cluster boxes are USPS Approved mail delivery equipment, they are the most common community mailboxes on the market. (To view other commercial mailboxes, click here). They also come in six (6) different architectural colors and can be modified to fit any community design. The colors include Sandstone (our most popular), Black, Bronze, Gray, Green, and White.

Our U.S. mail supply manufacturers equip every cluster box unit with an outgoing mail slot and one to two parcel lockers for package delivery (note: you can purchase an eight-tenant unit with up to four parcel lockers).

The Benefits of Centralized Mail Delivery

Mailbox clusters offer many benefits that can contribute significantly to your residential community. From facilitating efficient mail delivery and pickup to enhancing neighborhood security and aesthetics, these mailboxes are a smart investment for developers and community managers.

Note: While the cluster box units found on this page are pre-approved by the USPS for centralized mail delivery, customers may wonder if the same is true of 4C pedestal mailboxes.

The answer is: No.

4C pedestal mailboxes require pre-approval by the USPS before you purchase and install them if you intend to use them for USPS mail delivery. If you intend to use a 4C pedestal for private use, this should not be a concern. If you have questions about this, feel free to call us at (866) 707-0008.

Update: as of November 2020, all Florence and Salsbury mailbox manufacturers have discontinued 4C Pedestal Mailboxes. The USPS spec cluster box unit is now the industry standard for outdoor pedestal-mounted centralized mail receptacles.

Choosing the Right Cluster Mailbox for Sale (CBU)

Are you looking for the right cluster box to fit your needs? We can help! We offer a wide selection at the lowest prices to meet your next commercial or residential development project's needs. If this is your first time purchasing a cluster box unit, below is some information you may find helpful. Of course, feel free to call us at (866) 707-0008 or open a chat window (bottom left of the site) with one of our reps if you need immediate assistance.

Colors Available:

sandstone
bronze
white
green
black
for replacement units only gray

Options for USPS-approved Cluster Mailboxes

The Standard CBU is USPS Approved

The following cluster box units are already pre-approved by the USPS:

We also offer a 4-Door unit with larger doors (model # 1570-4T5) and an 8-Door unit with four parcel lockers (model # 1570-8T6) that are also USPS approved. If you are unsure which of these options best suits your needs, feel free to call and speak to one of our product experts. They can help you find the right unit within your budget. All clustered mailboxes have an individual compartment lock for complete mail security.

The USPS Approved F-series type CBU mailbox is available here in six different tenant door configurations and in six architectural color options from which to choose. We offer quantity pricing for two or more units in addition to other cluster box unit mailbox features (see individual product pages for details).

We always include pedestals..

You can also see a similar selection in High Security and Decorative options below.

The High-Security CBU (also USPS Approved)

While our manufacturers build the standard cluster box to prevent theft, the High-Security pedestal option can significantly reduce the risk of mail and identity theft. You can purchase vandal-proof fasteners to attach to the unit's anchor bolts for these units. The manufacturer has also designed the master front loading door to prevent prying, making it nearly impossible for mail thieves to break open the master door.

The latest industry-standard cluster box units boast a thicker, reinforced metal gate with a larger diameter hinge rod on all tenant doors.

Ideal for university mailing (and other applications), shop cluster mailbox units approved by the U.S. Postal Service. Both Florence Corp. and Salsbury Industries boast the largest cluster mailbox inventory in the United States, and we are proud to be their online suppliers. The architecturally specced sandstone cluster box units are the most popular among residential developers, HOAs, and property managers.

The Decorative CBU (also USPS Approved)

Decorative CBUs are identical to the standard units, except for the Pedestal and Cap. For Auth-Florence models, you can choose the Classic Decorative or Traditional Decorative units. For Salsbury models, you can select the Regency option. Images of these three options are displayed below. The Florence cluster box unit boasts two decorative styles. Shop Florence Commercial Mailboxes to view these styles and options.

Decorative CBU Accessories

Decorative CBU Accessories

Salsbury U.S.PS. Approved Decorative cluster box unit mailbox and OPL accessories are made of die-cast aluminum and can be ordered separately from Salsbury 3300 series CBUs and OPLs. The five (5) modern colors of decorative accessories with a long-lasting powder coating finish provide cluster box unit and OPL installations with an elegant finished appearance.

With the help of four (4) provided set screws, decorative caps may be quickly attached to the top of cluster box units and OPLs. They have a 3" diameter ball finial and a lovely sloping pattern. The decorative pedestal covers come with a plastic insect guard and installation hardware, and they are simple to put over CBU mailboxes and OPL pedestals.

Pedestal Mailboxes

Note: All manufacturers of 4C Pedestal Mailboxes have discontinued these units. They will no longer manufacture these mailboxes in the U.S. as of 11/30/2020.

The 4C Pedestal mailbox is similar to the CBU, except the 4C pedestal is not pre-approved by the USPS. These units will require USPS approval for USPS mail delivery and outgoing USPS pick-up. We strongly recommend contacting your local postmaster for approval of the 4C

Pedestal Mailbox before purchasing. Feel free to call and speak with one of our product experts if you need more information.

What to Know About Neighborhood Cluster Boxes

Newer neighborhoods and residential developments often utilize CBU mailbox installations at centralized locations. Cluster box units are convenient for the USPS and save postal carriers time. Rather than having to deliver mail to each of your neighbors, the postal carrier delivers mail to a central location.

Checking your tenant boxes may require a short walk from your house to the centralized location, or you can pick up your mail from the cluster box mailboxes on your way in or out of the neighborhood.

Shopping for neighborhood mailbox clusters? Salsbury cluster mailboxes ship fast.

Five Year Warranty

Every CBU mailboxes we sell has a Five (5) Limited Manufacturer’s Year Warranty.

Florence Manufacturing provides a five (5) year Warranty on its products from the date of purchase from an Authorized Florence Dealer. Likewise, Salsbury Industries covers defects in material and workmanship if reported in writing to them within five (5) years of the delivery date for any clustered mailbox.

For more information regarding manufacturer warranties, please see the provided resources below:

Wide Tenant Boxes Accommodate Larger Envelopes and Magazines

tenant compartments for cluster mailboxes

Shown above: the 16 Door CBU Tenant Box (3 in. high)

wide tenant compartment cluster mailbox

Shown above: the 13 Door CBU Tenant Box (4 - ¾ in. high)

The CBU tenant compartment size is the current USPS Standard for centralized mail delivery. Under 4C regulations, the tenant boxes are wider so that all mail, including larger envelopes and magazines, can be delivered flat without folding. There is also enough room in each tenant box for small-sized parcels.

Selecting the Best Governance Option for System Operation and Maintenance.

Operations and maintenance are among the most important aspects of utilizing Cluster Box Units. Depending on the size and scope of your multi-family complex, it may be more cost-effective to conduct regular facility assessments to identify potential problems.

Here are a few examples of specific governance options for system operation and maintenance:

  1. In-house maintenance team: This option involves hiring a team of maintenance professionals to oversee the operation and maintenance of the cluster box unit system. The team is responsible for regular inspections, repairs, and replacements as needed.
  2. Outsourced maintenance: An alternative to an in-house maintenance team is outsourcing the maintenance of the cluster box unit system to a third-party service provider. This provider can regularly inspect, repair, and provide replacements or emergency services.
  3. Self-maintenance by property management: Property managers can also choose to maintain the cluster box unit system. This option is suitable for smaller multi-family complexes with limited cluster box units. Property managers can perform regular inspections, cleanings, and minor repairs to ensure the system functions properly.
  4. Combination approach: Another option is to combine in-house and outsourced maintenance. For example, a property manager may have an in-house maintenance team responsible for minor repairs and regular inspections while outsourcing more complex repairs and replacements to a third-party service provider.

Installing Cluster Box Units Quickly and Safely in Multi-Family Properties.

Installation: If you need someone to install your cluster mailbox, we offer installation options on each product page. Choose the option that best suits your requirements for cluster units. After you place the order, we will send you info regarding the installation process and the next steps.

For more details on our mailboxes installation program, please see this article. Once you install your CBU, you can contact your local postmaster to come out and install their proprietary Arrow Lock, which allows the mail carrier to deliver to all tenants.

Call us if you’re interested in learning more about this unique service.

Installing mailbox clusters involves careful planning and execution. Per the neighborhood’s requirements, you should select a suitable location, prepare the ground, install the mailbox cluster unit, and coordinate with the local post office to activate mail delivery.

Since installing CBUs in multi-family complexes often requires professional cluster mailbox installation, we recommend hiring a reputable installation team who understands USPS requirements and the neighborhood’s specific needs.

Most residential developers install their cluster box units on a concrete pad made to USPS specifications. It is up to the contractor to cover this space with an outdoor gazebo or awning, which may serve as an added benefit to residents when retrieving mail in the rain.

Please also pay special attention to environmental factors, such as moisture and temperature control, and wiring for connectivity between multiple devices. Ultimately, a quality installation will ensure years of reliable service and performance from your cluster boxes.

Pros and Cons of CBU Mailboxes

Pros:

  1. Efficient Delivery and Collection: Centralized locations make it easier and quicker for postal workers to deliver and collect mail, enhancing efficiency.
  2. Improved Security: Mailbox clusters typically come with individual lockable compartments, ensuring only the rightful owner can access the mail.
  3. Space-Saving: Cluster mailboxes save space as they are one unit serving multiple residences, making them ideal for communities with limited available space.
  4. Durability: These units are usually made from durable and weather-resistant materials, meaning they can withstand harsh weather conditions and provide long-term service.
  5. Parcel Lockers: Most cluster mailboxes come with parcel lockers, providing a secure place for larger packages.
  6. Outgoing Mail Slots: Many units have slots for outgoing mail, adding convenience for residents.
  7. Improved Neighborhood Aesthetics: They provide a neat and organized appearance, potentially increasing the curb appeal of a neighborhood or community.

Cons:

  1. Installation and Maintenance Costs: The initial cost of purchasing and installing a mailbox cluster can be high, but ongoing maintenance costs are relatively low.
  2. Limited Personalization: Unlike individual curbside mailboxes, residents cannot personalize their slots in a cluster box unit mailboxes.

Remember, the advantages of CBU mailboxes generally outweigh the downsides, especially for larger communities. They provide an organized, secure, and efficient solution for mail delivery and collection. It's essential to consider your community's specific needs and circumstances before installing a cluster mailboxes system.

FAQ

While the post office is responsible for installing and maintaining their proprietary Arrow Lock on the CBU mailboxes master door, purchasing, installing, and maintaining CBU mailboxes remains the customer's responsibility. If you are a property manager, you are responsible for cluster mailboxes. If you are a member of an HOA, please refer to your HOA's Covenants, Conditions & Restrictions document. Here's a good article with more info.

  • Responsibility: the USPS is responsible for installing and maintaining the Arrow lock. The owner is responsible for installing, maintaining, and preserving the mailbox unit itself.
  • You, the CBU owner, are Accountable for installing and maintaining the cluster mailbox(es).
  • The USPS will install and maintain its proprietary Arrow lock mechanism for the master door.

Cluster box units (sold in our online mailbox retail store) should provide secure mail access to multiple tenants from a centralized location. After the customer installs their CBU and sandstone pedestal, the USPS installs their proprietary Arrow lock to access the entire unit via the master door. Tenants and residents access parcel boxes (or parcel lockers) via a special key left in the tenant's compartment by the postal carrier. Tenants can then retrieve their mail from individual compartments at their convenience. And that's it. For more details, view this article on how cluster box units work.

Looking for a deal? Use a Budget Mailboxes Promo Code in checkout and save.

After the customer installs their cluster mailbox, the postal carrier installs the USPS proprietary Arrow lock to access the entire unit via the master door.

Once you contact your local post office, the USPS or postal service carrier will schedule a time to service the CBU mailbox units and install the Arrow lock on site.

All cluster mailboxes (or cluster box units) are pre-approved by the USPS for incoming and outgoing mail.

The US Postal Service prefers and sometimes requires new residential developments to purchase cluster box units. For installation and maintenance topics, visit this article.

Florence Manufacturing and Salsbury Industries are the two primary manufacturers of USPS-approved cluster box units in the United States. We carry CBU mailboxes by both manufacturers here at Budget Mailboxes. Note: Salsbury cluster box units often ship faster.

Since there are only two main manufacturers of postal-approved cluster box units in the United States, much of the supply chain depends on their mailbox inventory and production at the factory level. If you have questions about which types of cluster mailboxes are pre-approved for centralized mail delivery, contact your local post office.

Cluster mailbox tenant compartments come in three sizes:

  • Standard, 3 in. H x 12 in. W x 15 in. D
  • Large, 4 - ¾ in. H x 12 in. W x 15 in. D
  • Extra Large, 6 - ½ in. H x 12 in. W x 15 in. D

Note: the tenant compartment size directly corresponds to the number of tenant doors available. Standard compartment sizes come in 8, 12, and 16-tenant configurations, while the large compartment size comes in a 13-tenant-door configuration. Finally, the extra-large compartment size is only available in a 4-tenant-door configuration.

For USPS mailboxes and clusters, the standard and large-sized tenant boxes accommodate most daily mail.

The cluster box unit cabinet and pedestal ship in separate packages. Below is a list of components and hardware you will receive in each CBU's package.

The pedestal shipping box includes:

  • Template guide to locating the pedestal base anchors.
  • Rubber Pad to fit between the ground and the pedestal base.
  • The fully-assembled pedestal.

The cabinet shipping box includes:

  • Cluster mailbox and integrated parcel lockers.
  • Hardware kit in a plastic bag (shipped inside the mailbox compartment) that includes:
    • Pedestal hardware.
    • Tenant door keys.
    • Parcel keys and tags.
    • Installation manual.
  • Cleaning instructions.
  • Parcel door hardware (in a plastic bag inside the cabinet), which includes two (2) McGard screws and three (3) two-way screws, four (4) Arrow Lock nuts, and panel lock covers attached by a temporary plastic fastener.

While we do not include them by default, you can also purchase four expansion or L-bolts with your CBU mailbox. Just select the bolts you need from the options menu.

A USPS Approved Cluster Mailbox (a CBU or Cluster Box Unit) is a centralized multi-tenant mailbox system typically used in multi-unit residential or commercial developments, such as apartment complexes, HOAs, or office parks. Please feel free to learn more about how cluster mailboxes work (clicking the link will take you to a different article).

A CBU is usually mounted on a pedestal. It can be mounted by other methods may not be USPS Approved, so we encourage all customers to check with their local post office before installing any custom solutions.

The USPS has specific regulations for the design and placement of cluster box units, including requirements for accessibility, security, and identification. Property owners or managers are also responsible for maintaining their mailboxes, clearing snow and ice around the unit, and repairing any damage.

The outdoor solar lamp from Whitehall may be the closest outdoor lighting solution we have to fit what you describe for your outdoor CBU mailbox. If that does not work, consider this outdoor lamp post.

Yes, you can configure high-security mailbox clusters with optional private locks or purchase the conversion kit for your existing units.

While such a feature is not available for the Cluster Mailbox itself, you can register online with the USPS for Informed Mail Delivery to receive email notifications with snapshots of your mail every time the postal carrier completes a delivery.

The cost of cluster box units for sale can vary widely based on size, features, and manufacturer. On average, they range from $1,000 to $3,000. To find the best prices and options, check out the selection on BudgetMailboxes.

Cluster box units are owned by the property developer, homeowners association (HOA), or property management company of the apartment, condominium, or housing development they serve.

Yes, these are constructed to be weatherproof. They're designed with durable materials to withstand harsh weather conditions, providing reliable, year-round service.

Mailbox clusters offer several benefits. They promote efficient mail delivery, enhance security with lockable compartments, and provide a central, easily accessible location for residents to collect mail. CBUs can also accommodate package delivery, making them a versatile solution for modern mail needs.

Centralized mail delivery is a system where mail for multiple recipients is delivered to a single, central location—like a CBU—instead of individual mailboxes at each recipient's address. It offers efficiency for postal workers and security for users.

Yes, these are designed in such a way that they meet the Americans with Disabilities Act (ADA) guidelines; this means they are accessible and usable by individuals with disabilities, ensuring equal access to mail services.

Parcel lockers are larger compartments in a CBU used for receiving packages that are too large to fit in standard mailbox compartments. View this article for more info.

When a package arrives, the postal worker places it in the parcel locker and puts the locker key in the recipient's mailbox. The recipient then uses the key to open the parcel locker and retrieve their package.

The standard door size for CBU mailboxes is about 3" high by 12" comprehensive, large enough to accommodate most letters and small packages.

Many manufacturers offer options for customizing CBUs, including color choices, decorative accessories, and tenant door identification. Check out the customization options on BudgetMailboxes.

A CBU mailbox configurator is an online tool that lets you build and visualize your customized mailbox unit. You can select the number of boxes, colors, and other features to fit your specific needs.

The 16 Door with 2 Parcel Lockers and the 8 Door with 4 Parcel Lockers are the two largest USPS-approved cluster box units for sale.

If you are a tenant, we advise you contact your property manager. If you are a property manager or owner, we can help you purchase replacement locks or key blanks. Call us at (866) 707-0008, or refer to this article for more information.

Customers Who Trusted Us With Their Projects

NBC
Major League Baseball
Harvard University
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Cisco
caterpillar
U.S. Department of Defense
U.S. Department of State
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Oregon Tech
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