Standard Cluster Mailboxes (CBUs)

High Security 1570 F-Series from National Mailboxes (USPS Approved & Postal Certified)

Explore our Standard Cluster Mailboxes (CBUs)—USPS-approved, secure, and durable mail delivery solutions perfect for multi-tenant properties. Designed to meet the highest standards, these mailboxes offer customizable options, parcel lockers, and easy installation, ensuring convenience and compliance for property managers and developers.CBU $200 off coupon

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High Security Standard Cluster Box Units 1570 F-Series from National Mailboxes (USPS Approved & Postal Certified)

The Standard Style Cluster Box Units (CBU) from National Mailboxes are designed to meet or exceed the new USPS Security Standards. They are made entirely of heavy-duty extruded aluminum, along with stainless steel components and hinges. These high-quality cluster mailboxes are front-loading style and include all tenant door locks and keys.

Parcel locker compartments for packages, outgoing mail compartments for outgoing mail, and pedestal stands are also included. All CBU mailboxes are offered and available in a selection of protective and durable powder-coated finish colors. Optional private master locks for private use or private access delivery are also available upon request.

Product Line Features

  • USPS-approved (postal certified)
  • Meets or exceeds USPS security standards
  • Front-loading
  • Pedestal included
  • Includes a heavy-duty tenant cam lock with three keys for each tenant’s door
  • Includes parcel locker compartments for packages
  • Parcel lockers include a key trapping lock for secure package delivery
  • Consists of an integrated outgoing mail slot with a weather protection hood
  • Includes standard silver adhesive identification decals with black numbers
  • Heavy-duty aluminum and stainless steel construction
  • Rugged, weather-resistant powder coat finish resists scratching and vandalism
  • Master front loading door designed to prevent prying with interlocking overlap seams and tight clearances
  • FREE shipping/freight (via truck) promotional-this month

CBU Colors: Sandstone (Standard Color), Black, Dark Bronze, Postal Grey, Forest Green, and White.

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Standard Cluster Box Unit FAQs

Are There Requirements for Standard Cluster Mailbox Units?

Standard cluster mailboxes must meet specific requirements to ensure they meet USPS regulations for accessibility, security, and efficiency. They must be USPS-approved and constructed according to strict standards, including installing an arrow lock between 36 and 48 inches from the ground to allow easy access for postal carriers.

Additionally, to accommodate larger deliveries, there must be at least one parcel locker for every ten tenant compartments. Mailboxes must be installed between 28 and 67 inches, with at least one compartment no higher than 48 inches, to ensure compliance with ADA regulations and accessibility for all users.

Each tenant compartment must be clearly labeled with an apartment number or tenant name, and the minimum compartment dimensions are 3 inches high, 12 inches wide, and 15 inches deep. Proper installation is crucial, with freestanding units requiring a concrete slab and wall-mounted units adhering to USPS and manufacturer guidelines.

To maintain service, landlords or property managers must promptly repair broken locks or inoperable units, as mail cannot be delivered to unsecured compartments. These requirements are designed to create a secure, user-friendly mail delivery system for multi-tenant properties.

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Can Standard Cluster Mailboxes be Customized?

Yes, Standard Cluster Mailboxes (CBUs) can be customized. While they are less customizable than residential or wall-mounted mailboxes due to their durable design, they offer various options to suit specific needs.

Customization options include a range of colors such as cream, black, gray, white, and green and the choice between standard adhesive numbering or engraved numbers for tenant compartments. CBUs also come in different sizes, with configurations ranging from 4 to 16 customer compartments and 1 to 4 parcel lockers.

Additional parcel lockers can be purchased separately to increase package delivery capacity. For added versatility, high-security models with reinforced doors and decorative models designed to complement a property’s aesthetics are available. These options make CBUs adaptable to various requirements while maintaining their robust, USPS-approved design.

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How are Standard Cluster Mailboxes Installed?

Standard cluster mailboxes are installed following a straightforward process that requires preparation, proper tools, and coordination with USPS. First, you must select the right unit based on the number of customers needing mail delivery.

Next, choose a centralized location where customers can access their mail without walking more than one block, and ensure the site is USPS-approved before proceeding. A concrete pad must be prepared according to specific requirements—typically 48×48 inches and at least 4 inches thick, although smaller pads require greater thickness, up to 8 inches.

The pad must also be free of damage and have intact anchor bolts. Once the pad is ready, the pedestal is installed by drilling holes, placing a gasket on the concrete, and securing the pedestal in a level position. With the help of at least two people, the cluster mailbox unit is then mounted onto the pedestal and secured with the provided hardware.

Finally, USPS must be contacted to install the master arrow lock and parcel locker locks. The keys to customer units should be tested to ensure proper functioning before the USPS completes its part of the installation. These steps ensure the mailbox is installed correctly and compliant with USPS requirements.

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What are Standard Cluster Mailbox Units, and How Do They Work?

Standard cluster mailbox units (CBUs) are outdoor mailboxes designed to serve multiple families or businesses. They consist of 8 to 16 locked compartments for mail and up to two parcel lockers for packages.

Mounted on pedestals secured to concrete slabs, these durable units are commonly used in apartment complexes, business areas, and newer neighborhoods. USPS employees use a master key with an arrow lock to access all compartments for delivery.

For packages, a key to the parcel locker is left in the customer’s mailbox, and the key remains in the locker for retrieval by USPS the next day. CBUs must meet USPS regulations to ensure secure and efficient mail delivery.

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What is the Cost of Standard Cluster Mailboxes?

Standard cluster mailbox units (CBUs) range from just over $1,000 for smaller units with four doors and one or two parcel lockers to around $2,200 for larger units with up to 20 doors.

Additional costs may include pouring concrete slabs for installation, purchasing extra parcel lockers to meet USPS requirements (if needed), and professional installation. Optional security features, such as vandal-proof fasteners, may add minimal costs.

Despite the upfront expense, CBUs are durable, require little maintenance, and offer long-term savings due to their resistance to weather, tampering, and vandalism.

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Why Invest in Standard Cluster Mailboxes?

Despite their higher upfront cost, investing in standard cluster mailboxes offers numerous benefits. They provide a durable and low-maintenance solution for centralized mail delivery, saving time and money in the long run.

CBUs simplify installation compared to individual mailboxes, requiring only a concrete slab and minimal labor. They enhance mail security with locking compartments and parcel lockers, reducing theft risk.

Additionally, they improve delivery efficiency for USPS carriers and offer convenience for users, who can access their mail anytime. Built to withstand weather and physical damage, CBUs require minimal maintenance and last for years, making them a cost-effective choice for landlords and property managers. Moreover, they can replace outdated units to meet modern standards.

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CBU Feature and Maintenance Videos

Watch informative videos that will help you understand the full potential of cluster box units (CBUs). Whether for commercial or residential use, CBUs are versatile for any property.

Standard-style Cluster Box Units (CBUs) from National Mailboxes represent the latest in secure, efficient mail delivery systems for multi-tenant properties. These high-quality commercial mailboxes, part of the NEW 1570 F-Series Type, are USPS Approved and postal certified and designed to meet or exceed the latest USPS Security Standards.

Key Features

  • Constructed entirely of heavy-duty extruded aluminum with stainless steel components and hinges
  • Front-loading design for convenient access
  • Available in four types (I, II, III, IV) to suit various property sizes
  • Includes individually locked tenant compartments with keys
  • Features parcel locker compartments for secure package delivery
  • Incorporates outgoing mail compartments
  • Comes complete with pedestal stands for easy installation
  • Offered in a wide selection of durable powder-coated finish colors

These Standard CBUs provide enhanced security features, ensuring the safety of residents’ mail and packages. The robust construction and high-quality materials contribute to the units’ longevity and resistance to tampering.

The 1570 F-Series offers flexibility in installation, with options for pedestal and wall mounting, depending on site requirements. Each unit is designed to comply with USPS regulations, making it ideal for use in apartments, condominiums, office complexes, and other multi-tenant properties.

These Standard CBUs offer a low-maintenance, centralized mail management solution for property managers and owners. Optional private master locks for private use or private access delivery are available upon request, adding an extra layer of customization and security.