Brick mailboxes are not universally prohibited by one nationwide criminal rule. A masonry structure can nevertheless violate road-authority, right-of-way, permit, or local safety requirements. Postal approval of the receptacle is not the same as approval of a rigid roadside support. [1]
Distinguish the box from the support
USPS publishes mailbox installation guidance and recommends supports that bend or fall away when struck. It warns against unyielding supports such as concrete posts and heavy metal structures. Those safety recommendations should not be transformed into a claim that every brick enclosure is automatically illegal everywhere. [1]
Ask the road authority
State and local agencies may control structures within a public right-of-way or clear zone. Distance from the traveled way, speed, road ownership, and the structure’s design can matter. An HOA’s approval does not override a road permit or USPS delivery requirement.
For example, a decorative masonry enclosure well outside a regulated roadside area presents different issues from a rigid pillar immediately beside a high-speed road.
Liability is fact-specific
After a crash, negligence and other state-law questions can involve foreseeability, placement, design, permits, and causation. Neither a permit nor the driver’s fault should be assumed to settle every issue.
Before building
Confirm the proposed delivery location with USPS, obtain the road authority’s written requirements, and check local permits. USPS’s curbside standard addresses the receptacle’s design separately. [2]
Ask for the actual roadside standard
Find out which agency owns or maintains the road, whether the proposed structure lies within its controlled area, and whether it has adopted a support or clear-zone standard. A national safety recommendation, an adopted state rule, and a local permit condition can have different legal effects. Keep the written answer rather than relying on a neighbor’s similar structure. [1]
If a masonry enclosure surrounds an approved mailbox, ask whether the whole support arrangement is acceptable; approval of the inner receptacle does not necessarily approve the outer mass. Likewise, moving a rigid support slightly without reviewing the applicable roadside requirement may not resolve the concern. For an existing structure, discuss an approved replacement and delivery continuity before removing or rebuilding it. After a crash, preserve photographs, location measurements, approvals, and design records so a state-law liability review can address the actual condition rather than a generic claim about all brick mailboxes. [2]
See mailbox placement and delivery interruptions before investing in a permanent structure.
Primary sources
Sources checked: October 31, 2026.