**Not all mailboxes are USPS Approved for all applications!
Some older style mailboxes, such as the 4B+ compliant 1400 Series 4B+ Horizontal mailboxes and Vertical mailboxes, are only USPS Approved for replacement purposes. For any mailbox project that will involve U.S. Postal Service mail delivery, it is important to consult with the local Postmaster prior to ordering to make sure that it will meet with their approval.
All new construction and renovation designs REQUIRE U.S. Postal Service STD-4C compliant mailbox systems.
As of October 5, 2006, all new construction and renovation designs REQUIRE U.S. Postal Service STD-4C compliant mailbox systems.
If your existing commercial mailbox meets USPS specifications, you can have it approved by your local postmaster. We carry new USPS-approved STD-4C mailboxes for new buildings or businesses that are renovating. USPS-approved mailboxes from U.S. Mail Supply are available in a variety of styles.
Buying a new mailbox might seem easy, however, there are regulations enforced by the United States Postal Service regarding mailbox specifications. Many postal customers aren’t aware of these regulations, then become confused when their mailbox isn’t approved.
The USPS has to regulate the types and styles of mailboxes allowed for residential and commercial use to prevent delays and accidents when delivering mail. US Mail Supply offers a wide variety of USPS-approved mailboxes for homes and businesses. Residential and commercial mailboxes must meet specific USPS requirements, including box size, location, mail slot dimensions (when applicable), and identification information.
Depending on where you live, some of these restrictions and rules may not apply. To find out exactly what is and isn’t approved for use by the USPS, contact your local post office for clarification or visit the official USPS homepage.
**Not all mailboxes are USPS Approved for all applications! Some older style mailboxes, such as the 4B+ compliant 1400 Series 4B+ Horizontal mailboxes and Vertical mailboxes, are only USPS Approved for replacement purposes. For any mailbox project that will involve U.S. Postal Service mail delivery, it is important to consult with the local Postmaster prior to ordering to make sure that it will meet with their approval.**
A residential mailbox on a curbside post must meet certain distance restrictions. All mailboxes must be 41” to 45” above ground level for easy delivery by foot or vehicle. The post must be 6” to 8” from the curb to avoid being a hazard for drivers or pedestrians. The posts themselves can be made of wood, steel, or aluminum. A post should go no deeper than 24” into the ground.
These mailboxes can be either traditional, contemporary, or locking. Both traditional and contemporary mailboxes can be made in three different sizes, depending on your needs. The approved sizes reach up to 22.8” x 11” x 15”. Locking mailboxes are allowed more size dimensions due to their security features, though it is always recommended to check with your local postmaster before installing your own locking mailbox.
Indoor mailboxes can be horizontal, vertical, or custom-made to meet your facility's needs. All indoor mailboxes have available locks and keys to protect your correspondence and prevent identity theft. US Mail Supply even has USPS-approved drop boxes for safe package and parcel delivery.
Buying and installing the right mailbox for your home or business is easy with US Mail Supply. All our mailboxes are made to USPS specifications and include easy-to-follow installation instructions to help ensure you meet all official guidelines.
Before installing a wall-mounted mailbox in your residential areas, you must check with your local post office to determine the height and position for approval. Postal carriers must be able to easily reach your mailbox from the sidewalk, your front steps, or your porch.
If you choose a mailbox with a lock, only your incoming mail will be secure as USPS workers are not allowed to take your mailbox key. This can limit the size of parcels you will be able to receive based on your mail slot size.
Cluster mailboxes and neighborhood delivery and collection box units (NDCBUs) make for easy delivery to multiple residences at once. Since NDCBUs were transitioned out in favor of cluster boxes, there are more rules about their use by the USPS. New NDCBUs cannot be purchased or installed unless it is to replace an existing or damaged unit.
Cluster mailboxes from US Mail Supply are USPS approved and include a host of security features. Compartments are reinforced, weather resistant, and accommodate larger parcels than the previous NDCBUs. Please note, your local post office must be consulted before installation due to specific placement rules.
USPS mailbox regulations state cluster mailboxes installed in all new construction and major renovations of multifamily buildings must meet STD-4C specifications. New specifications dictate minimum compartment size, parcel locker ratio, standardized tenant design, ADA compliance, and more. US Mail Supply is here to help you find the right 4C mailboxes for your building.
Don't worry, we can help you figure out what's best and most cost efficient for your space. A representative at U.S. Mail Supply will help you figure out what is required for USPS or private delivery, the number of units you need and any information required for installation.