Mailbox Installation

What Are the Requirements for Mailboxes for Apartments?

If your new apartment complex still lacks a centralized mailbox system, it's important to understand that USPS regulations must be followed before mail delivery can begin. Cluster box units (CBUs) are now the preferred standard for multifamily buildings. These mailboxes must be secure, accessible, and properly located—both for tenant convenience and postal carrier efficiency.

To ensure USPS approval and avoid mail service delays, we follow key requirements during every mailbox installation:

• ADA accessibility: Mailboxes must be reachable for residents with disabilities.
• Weather resistance: Units must be constructed with materials that protect the contents from rain, snow, and extreme heat.
• Secure locking systems: USPS-approved locks and tenant keys are required for each compartment.
• Correct placement and height: Mailboxes must be mounted at specific heights and distances per USPS and ADA guidelines.
• Master access for carriers: Each unit must have a secure master access panel for postal workers.

What if Your Cluster Mailbox Doesn't Comply With Regulations?

If your cluster mailbox doesn't comply with USPS or ADA regulations, you won't be hit with unexpected, costly fines. That said, mail delivery can be delayed or denied until the issues are resolved. This can frustrate tenants and incur unnecessary reinstallation costs. In our experience, the most common problems we're called in to fix include incorrect height, poor placement, or lack of secure access.