Apartment Building Mailboxes USPS-Approved Multi-Unit Cluster Boxes
US Mail Supply provides a wide selection of USPS-approved apartment mailboxes designed to meet the needs of multi-tenant buildings. From outdoor pedestal CBUs to indoor wall-mounted 4C systems, our units combine security, durability and ADA-compliant accessibility. Property managers, HOAs and developers rely on us to supply apartment mailbox systems to keep residents’ mail safe, simplify delivery for postal carriers and maintain compliance with USPS STD-4C standards. Call our team at 262-782-6510 for more information.
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What Makes a Mailbox Right for Apartment Buildings?
Apartment mailboxes are centralized systems built to serve multiple tenants in one secure, accessible location. Unlike curbside residential boxes, multi-tenant apartment mailboxes are specifically designed for apartment complexes, condominiums, HOAs and student housing communities.
USPS-approved apartment mailboxes improve efficiency by consolidating delivery for carriers and providing tenants with a convenient, protected space to receive letters and packages. Whether installed in a lobby, outdoors on a pedestal or inside a mailroom, the right mailbox balances compliance, tenant security and ease of use.
Styles of Apartment Building Mailboxes
Apartment mailbox systems come in a variety of styles to meet USPS requirements and the unique needs of each property. US Mail Supply offers the following options for apartment buildings:
Outdoor Pedestal CBUs
The standard outdoor solution for apartments, condos and multi-family properties. Pedestal cluster box units are USPS-approved and built for durability in high-traffic areas.
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4C Horizontal Mailboxes
Wall-mounted or recessed options required for new construction and major renovations. 4C mailboxes meet STD-4C standards and provide secure, centralized mail delivery indoors.
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Vaults & Drop Boxes
Vaults and drop boxes provide a secure place for packages, bulk mail or outgoing deliveries. Durable, lockable designs are available in both USPS-approved and private-use models.
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Bulk Mail Collection
Bulk mail collection units manage high volumes of tenant or property-wide mail. Centralized organization improves efficiency for property managers and carriers.
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4C Depot Mailboxes
4C depot mailboxes are freestanding modules built to meet USPS STD-4C standards without wall installation. This style works well in apartments, condos or properties where recessed mounting is not practical.
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4B+ Vertical Indoor Mailboxes
Vertical 4B+ mailboxes remain approved for replacement projects only. 4B+ units are commonly found in older apartment buildings, not new construction.
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Private-use Mailboxes
Private-use mailboxes serve in-house delivery needs instead of USPS service. Centralized distribution supports apartments or properties with internal mail systems.
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Key Keepers
Key keepers give USPS carriers secure access to internal mailrooms or centralized delivery areas. Lockable design simplifies carrier entry while restricting building access.
Learn MoreUSPS Rules for Apartment Building Mailboxes
Apartment building mailboxes must meet USPS STD-4C requirements for all new construction and major renovation projects. USPS standards cover size, security, accessibility and tenant labeling.
Shop Apartment MailboxesTenant Locks
Tenant locks must be no higher than 67 inches above the floor.
Bottom Mailbox Compartments
Bottom mailbox compartments must be at least 28 inches from the floor.
Parcel Lockers
Parcel lockers must be positioned no lower than 15 inches from the floor.
USPS Arrow Locks
USPS Arrow Locks must be placed between 36 and 48 inches above the floor.
