Cluster Mailboxes
Shop USPS Approved Cluster Mailboxes backed by our price-match guarantee.*Pedestals are always included.
SHOP NOW4C Horizontal Mailboxes
Shop 4C Horizontal Mailboxes for recessed indoor mail delivery by the USPS. Contact your local post office to confirm USPS approval.
SHOP NOW4B Horizontal Mailboxes
Shop 4B Horizontal Mailboxes for replacement of existing units. Contact your local post office to confirm USPS approval.
SHOP NOWVertical Mailboxes
Shop vertical apartment mailboxes available in 3-tenant and up to 7-tenant door configurations. Recessed mount and surface mount options are available.
SHOP NOWDrop Boxes & Collection Boxes
Keep packages and letters safe in pedestal mounted, wall-mounted, or recessed mounted locking commercial drop boxes and letter lockers.
SHOP NOWPrivate Delivery Commercial Mailboxes
Shop our private delivery commercial mailboxes for centralized mail distribution. Note that you can modify some USPS delivery mailboxes for private distribution applications.
SHOP NOWOutdoor Commercial Mailboxes
Shop our selection of outdoor commercial mailbox applications, including pedestal mounted, USPS approved cluster mailboxes.
SHOP NOWIndoor Commercial Mailboxes
Shop the largest online selection of recessed, wall-mounted indoor horizontal and commercial-grade vertical mailboxes for multi-unit residences and business complexes.
SHOP NOWUSPS Approved Mailboxes
Shop all USPS approved mailboxes. While these commercial mailboxes comply with USPS standards, we encourage customers to check with their local post office for USPS requirements in their area before purchase and installation.
SHOP NOWChoosing the right Commercial Mailbox
We sell commercial mailboxes designed for a variety of applications, including schools, hospital facilities, nursing homes, hotels, residential developments, apartment complexes, and more. The Cluster Box Unit (CBU) "takes the cake" as our most popular mailbox designed for centralized outdoor mail delivery for multiple tenants. Below you'll find a detailed overview of our top commercial categories:
Cluster Mailboxes (a.k.a. CBUs or Pedestal Mailboxes)
Auth Florence and Salsbury Industries, the two leading commercial brands in the U.S., make USPS approved CBUs in 8-Door, 12-Door, 13-Door, and 16-Door configurations and in four architectural colors (you can also purchase Salsbury CBUs in Green and White, in addition to the four traditional colors). All units include a matching pedestal for installation.
Related Commercial Mailbox Categories
Community Mailboxes
Apartment Mailboxes
Commercial Vertical Mailboxes
Vertical Mailboxes are part of the USPS 4B specification. In layman's terms, this means that customers typically only purchase them to replace existing units. You can purchase the vertical as either a surface mounted (on the wall) or recessed mounted unit (in the wall). They come in 3-Door, 4-Door, 5-Door, 6-Door, and 7-Door configurations. Like CBUs, the two mailbox brands we carry in this category are Auth Florence and Salsbury. Both are quality mailbox brands, so the selection is usually a matter of price and preference. You can also purchase private delivery units (for in-house mail distribution) if you do not need the USPS to deliver.
4C Horizontal Commercial Mailboxes
The 4C Horizontal is the industry standard for recessed mounted centralized delivery. Unlike the CBU, the 4C unit is usually recessed in a wall, indoors or outdoors, or in a kiosk (typically outdoors). However, you can purchase the 4C with a surface mount collar or free-standing kiosk if you do not intend to install the units into a wall. These can be purchased with or without parcel lockers for package delivery and can be selected for either USPS or private delivery. Available in a variety of door configurations and architectural colors, the 4C mailbox is an ideal solution for apartment complexes and commercial buildings.
4B Horizontal Commercial Mailboxes
The predecessor of the 4C unit, customers typically purchase 4B mailboxes to replace existing 4B applications. Prior to purchasing new 4Bs to replace older units, we recommend you contact your local post office for approval. Since the post office will need to approve the application before it's installed, this extra precaution can save time and money. Typically, 4Cs will need to replace 4Bs when the wall opening (for housing the recessed units) is modified. For new construction, customers should purchase 4C mailboxes or Cluster Box Units to meet US Postal specifications.
Commercial Specialty Mailboxes
Sometimes customers require more specialized mail delivery products. Our selection of specialty mailboxes includes Salsbury Courier Boxes, Letter Drops, Door and Wall Mail Slots, as well as a variety of centralized mail units for private use (universities, etc.). If you cannot find the mailbox you are looking for, or if you would like more information regarding one of these products, please give us a call at (866) 707-0008 or open up our chat window (bottom left of the site) to speak with one of our customer care reps.
USPS Commercial Mailboxes or Private Delivery?
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Here are the key differences between a USPS approved and a private delivery mailbox:
A USPS approved mailbox meets USPS regulations for height, width, installation location, ADA accessibility compliance, and compartment size. Luckily for you, we already designate the mailboxes that meet these criteria, so all you really need to know are:
- The number of tenants that will need access to the mailbox
- The type of installation: whether the units will be recessed into an existing wall, mounted to an existing wall via surface mounted enclosures, or free standing in a kiosk
A mailbox for private delivery doesn't have to meet any of the USPS regulations since it will be serviced by an in-house mail department. This is most common with universities, dorms, or organizations that distribute mail in-house. If you purchase a mailbox for private use, the appropriate lock will be installed and keys will be included with the unit.
View our selection of USPS Approved Commercial Mailboxes.
View our selection of Private Delivery Commercial Mailboxes.
School & University Mailboxes
Any mailbox in our commercial category can be used at a school or university. Whether you need a pedestal cluster box, a 4C horizontal, a 4B horizontal, or a vertical unit depends on the following criteria:
- Do you need to purchase mailboxes for a new building or a new development, and will the USPS deliver to these mailboxes? If the answer is yes, then you need either a cluster or a 4C horizontal mailbox.
- Do you need to replace existing 4B vertical or horizontal mailboxes serviced by the USPS? If the answer is yes, you can purchase either the 4B vertical or horizontal for replacement purposes. However, we strongly recommend that you contact your local post office prior to purchasing one of these units to ensure that the USPS will deliver.
- Does your school, college, or university have in-house mail personnel that require their own keys to access your mailboxes? If yes, then you can purchase any of the above mailboxes as Private Delivery models.
Still not sure which product you need? Let us help! Call us at (866) 707-0008 or open a chat with one of our customer care reps and let us walk you through the process.
Commercial Mailboxes FAQ
Where to buy commercial mailboxes
Also: Who sells commercial mailboxes? Where to buy commercial mailboxes near me?
You can purchase commercial mailboxes from Budget Mailboxes, of course! We offer USPS approved pedestal mount cluster mailboxes by the top two manufacturers in the U.S. While you may wish to work with commercial mailbox dealers in your area, Budget Mailboxes can provide you with expert service and competitive quotes. We ask that you consider us for your next mailbox project.
How to install commercial mailboxes
If you are installing cluster mailboxes for the first time, we recommend the following pages and articles:
- First, open this installation article.
- Also, you may want to pull up this copy of the manufacturer's installation manual.
- And we recommend opening this specification doc for the concrete pad.
If you are installing recessed 4C horizontal mailboxes, you can read the manufacturer's installation manual here. You may also want to glance at this comprehensive overview of 4C mailboxes.
We strongly advise following the installation requirements provided in the manufacturer's installation manual for your product.
What to cover commercial mailboxes with to guard against rain
Cluster mailboxes are fitted with a sloping hood to facilitate rain run-off. As for 4C, 4B, and vertical mailboxes, the manufacturers advise installing under an awning, within a protected mail kiosk, or inside a building, usually a lobby.
Commercial mailboxes for USPS delivery: How to obtain a key
Our manufacturers ship all commercial mailboxes from the factory floor with three (3) keys per tenant door, which you will find taped to the inside of the mailbox unit. To open the unit and find your keys, see this article.
As for the arrow lock that opens the mailbox master door, your local postal worker will come out to the mailbox and install their proprietary arrow lock.
If you ordered a mailbox from us and it is missing keys, please call us right away.
For replacing keys that are lost or stolen, please view this article.
How to order commercial mailboxes
Ordering commercial mailboxes online is secure and straightforward. We accept the following payment methods:
- Credit and Debit Cards (Visa, MasterCard, Amex, Discover)
- PayPal Express Checkout (pay with your PayPal Account or use your credit or debit card in PayPal's secure checkout window)
- Check or Money Order by Mail (our mailing address is in the checkout)
If you purchase commercial mailboxes through our online checkout, your transaction is secure; even if you opt to save your address for a future purchase, we never store your payment information.
If you prefer to mail a check, we accept that form of payment as well. You can also request a formal and competitive quote tailored to your mailbox project.