USPS Clarifies Cluster Mailbox Guidance

For more than 10 years, confusion over U.S. Postal Service (USPS) requirements for cluster mailbox units (CBUs) in new housing development has challenged builders nationwide. This issue recently resurfaced in Greensboro, N.C., as developers in the area faced a lack of communication and arbitrary rules from local USPS representatives.

In response to outreach from Sen. Ted Budd’s office, the USPS issued a response letter clarifying its policies in an encouraging move for builders and developers seeking clearer standards.

Since 2012, CBUs have been the default method of mail delivery for the USPS. It claims this method increases efficiency, safety and cost savings. However, there has been inconsistent guidance and enforcement from local post officials about placement, design and surrounding infrastructure (e.g., parking, lighting, awnings). The uncertainties have delayed projects and added unnecessary costs to projects.

Within the letter, USPS apologized for inconsistent or incorrect local guidance and committed to improving communication, while reaffirming that that all new developments should use centralized (CBU) delivery as outlined in the PO-632 National Delivery Planning Standards: A Guide for Builders and Developers (or Builders Guide). USPS also confirmed that local postal officials are being retrained and directed to adhere to the Builders Guide moving forward.

For developers:

• CBUs do not require awnings or lighting (though both may be beneficial).
• CBUs do not require dedicated parking for carriers.
• Larger developments may have multiple CBU locations to balance resident convenience and carrier efficiency.

This clarification can be used to streamline development planning and hopefully will reduce future uncertainty during site design and permitting. It can be used in situations where local postmasters are not following the Builders Guide nor the guidance, but also reinforces the importance of consulting USPS early in the process to identify appropriate CBU locations. Finally, this demonstrates that industry collaboration and direct engagement with policymakers can produce practical outcomes for NAHB members.

NAHB extends sincere thanks to Kim Phillips, regulatory affairs director for the Triad Real Estate and Building Industry Coalition, for involving Sen. Budd’s office in the effort to request federal clarification on CBUs, and the subsequent action by Sen. Budd’s office, and USPS officials on this important issue. We greatly appreciate local advocates who elevate builder concerns to the national stage and help drive constructive dialogue.

NAHB remains committed to advancing clear, consistent and builder-friendly regulations. We encourage members to review the USPS Builders Guide and share any ongoing challenges with our land use team to ensure consistent national guidance.