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Commercial Mailboxes

Commercial Mailboxes

Commercial Mailboxes

Commercial Mailboxes are designed for a variety of applications. They can be purchased for schools, hospital facilities, nursing homes, hotels, apartment complexes, and many other applications. Our most popular commercial item is the Cluster Box Unit (CBU), designed for centralized outdoor mail delivery for multiple tenants. Below is a detailed overview of our top commercial mailbox categories:

Cluster Mailboxes (CBUs)

Auth Florence and Salsbury Industries CBUs are approved by the USPS and are our most popular product when it comes to centralized mail delivery. They are available in 8-Door, 12-Door, 13-Door, and 16-Door configurations and come in four architectural colors (Salsbury CBUs can be purchased in Green and White, in addition to the four traditional colors). All units include a matching pedestal for installation.

Cluster Mailboxes Sandstone Cluster Mailboxes Bronze Cluster Mailboxes Gray Cluster Mailboxes Black

Vertical Mailboxes

Vertical Mailboxes are part of the 4B category and can be purchased as surface mounted (on the wall) or recessed mounted units (in the wall). They are available in 3-Door, 4-Door, 5-Door, 6-Door, and 7-Door configurations. The two mailbox brands we carry in this specific category are Auth Florence and Salsbury. Both are quality mailbox brands, so the selection is usually a matter of price and preference. Vertical mailboxes can also be customized according to your specifications.

3 Door Vertical Mailbox Gray - Surface Mount 3 Door Vertical Mailbox Gold - Recessed Mount 3 Door Vertical Mailbox Bronze - Surface Mount 3 Door Vertical Mailbox Sandstone - Recessed Mount

4C Horizontal Mailboxes

The 4C Horizontal unit is the industry standard for recessed mounted centralized mail delivery. Identical to the CBU, the 4C unit is a cluster mailbox designed to be mounted in a wall, indoors or outdoors, or in a kiosk (typically outdoors). Units 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 providing new developments with centralized mail delivery.

Front Loading 4C Horizontal Mailbox 20 Doors and 2 Parcel Lockers - Aluminum Rear Loading 4C Mailbox Maximum Door Height Front Loading 4C Mailbox Maximum Height Sandstone Rear Loading 4C Mailbox Maximum Door Height Gold

4B Horizontal Mailboxes

The predecessor of the 4C unit, 4B mailboxes are purchased to replace existing 4B mailbox applications. Prior to purchasing new 4Bs to replace older units, we recommend that customers contact their local US Post Office for approval. 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.

Specialty Units

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 institutional use (universities, etc.). If there is a specific mailbox you are looking for but cannot find, or if you would simply 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 site) to speak with one of our customer care reps.

Have a question about this product?
Frequently Asked Questions
Question: I need a 4-door pedestal unit. Do you have them in stock?
Answer: Yes, we have the Front Loading 4C Pedestal Mounted Mailbox w/4 doors as well as a selection of 4-door Pedestal Mount Horizontal Mailboxes to choose from.

Question: I need a pedestal unit for 3 tenants.
Answer: We do carry a 3-tenant pedestal unit. Please view our Front Loading 4C Pedestal Mounted Mailbox w/3 doors for more details. Thank you.

Question: Do you have any cluster box accessories?
Answer: Yes, please view our Cluster Box Accessories for more details. Thank you.

Question: Would you quote a mailbox for six unit condo? Six 4c horizontal boxes with one outgoing with key and slot. Please include metal covering, black powder coat, and wall mounted.
Answer: The cost of the item would be $857.00 with free shipping. This includes the surface mount collar for wall mounting the Front Loading 4C Horizontal Mailboxes w/ 6 Tenant Mailboxes.

Question: I need a 4-unit exterior wall-mounted cluster box with a parcel locker.
Answer: The 4-Door 4C with surface mount collar meets all current regulations.

Question: I need a two-unit pedestal mailbox that is USPS approved with two separate key-ways. Do you have them?
Answer: The 2 Door 4C Pedestal Mailbox mount is currently the only thing on the market of this size. Also, it does require local pre-approval.

Question: I need a two-business mailbox that wall mounts for as cheap as possible.
Answer: The smallest wall mount unit available is the 3-Door Vertical Mailbox. However, the third door can be used as an outgoing mail slot.

Question: I am looking for apartment mailboxes with 4 units.
Answer: The 4-Compartment Vertical Apartment Style Mailboxes can be recessed, semi-recessed, or surface mounted.

Question: I am looking for a 9-door mailbox for a 4-plex. It must be front loading for USPS.
Answer: Please view the items listed for our 9 Door, front loading, USPS-approved mailboxes. Thank you.

Question: Which USPS mailboxes are the tallest with rear loading? Either 20 or 40 doors?
Answer: The tallest USPS approved, rear loading mailbox is going to be the Rear Loading 4C Horizontal Mailboxes  w/ 20 Tenant Mailboxes and 2 Parcel Units.

Question: How high and how low can the mailslots be installed to meet USPS regulations?
Answer: The bottom of the slot must be at least 30 in. above floor.

Question: I need a "Snow bird" mailbox deep enough to hold mail for 4 months and lockable from the back.
Answer: The Large Black Locking Mail-Guard Plastic Mailbox may fit your needs.

Question: Do you have replacement parts for cluster boxes, I can't seem to get a direct search result.
Answer: Yes we do sell parts. What Part are you looking for?

Question: I need a pedestal box for 5 units. What is the cost?
Answer: You can choose from a few options. We offer the Front Loading 4C Pedestal from Auth Florence, the 5-Door 4C Pedestal Mailbox from Salsbury, and the 5-Door 4C Pedestal Mailbox - 3407S-05 also from Salsbury. Note: these units require USPS Approval. However, the 8-Door Cluster Mailboxes are already USPS approved.

Question: I have an existing brick mailbox, do you make a locking cover that will bolt to the brick to cover the front?
Answer: Not sure exactly what you are looking for. Please call for further assistance.

Question: looking for lockable horizontal units capable of holding fair quantity of mail. I need 2 in one stucco unit
Answer: How many tenant doors do you need?

Question: Is there an installation kit for a cluster box with 8 units?
Answer: There is no installation kit. What parts are you looking for?

Question: We need a 40 door pedestal unit, can you give us a price
Answer: There is not a 40-door CBU. You can purchase two 20 doors. For buying two, you will get a discount at $1,616.00 per mailbox.

Question: I need a replacement steel post for a cluster box post is 4" x 6" x 31"
Answer: We will need to know what model you have to get you the proper pedestal. Please call.

Question: Who manufactures your cluster units?
Answer: We have cluster box units made by Auth-Florence and Salsbury.

Question: I am looking for a one-door mailbox for a commercial building. I have a picture of the old one. Could you please send me an email and I will forward you the picture?
Answer: Please email your request to

Question: Do you have 8-door roadside locking boxes?
Answer: Please click the link to see 8-Door Standard CBU Mailboxes. Thank you.

Question: I need a 12-bay mailbox with stand.
Answer: Please click the link to view the 12-Door CBUs. Thank you.

Question: I only need a 2-unit pedestal or wall-mount box.
Answer: Please search this SKU: WL-3406S-02SANBM

Question: We are interested in putting a 25-package locker in our building. Can someone come and give us information about pricing and installation?
Answer: We do not have any field service technicians.

Question: I need a 4-door model that has an area below or above for bulk mailers.
Answer: Please search this SKU:WL-3411S-04SANBM

Question: I should have explained that I need a recessed wall mount with four doors and a bin for mailers.
Answer: Please take a look at this 4 Door Recessed 4C Mailbox. It has four tenant doors, a parcel locker for receiving large packages and an outgoing mail slot

Question: Owner is specing a Model 3308Type1 ,8 compartments, 1 outgoing mail receptacle, 2 parcel lockers; and Model 3312, Type II, 12 compartments, 1 outgoing mail receptacle, 1 parcel locker. Are these available? We have 20 total units. Is there anything else available for this many units. They will be mounted outdoors.
Answer: We have less decorative options. You can check out these commercial options here: commercial cluster boxes

Question: I need a cover plate for outgoing mailbox.
Answer: We do not sell that part. Please contact the product manufacturer.

Question: What is the ratio of parcel boxes to mailboxes?
Answer: The USPS recommends that you have 1 parcel box for every 10 tenants. Thank you.

Question: Do you have a 20-door, 2PL outdoor unit for USPS delivery?
Answer: Yes, here is the SKU: WL-3416D-20SANBM

Question: Do you sell the medeco locks for the commercial boxes?
Answer: We do sell Medeco Locks. They are not for a particular commercial mailbox. Here is the SKU:WL-LOCK-MEDECOBM

Commercial Mailboxes
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Wall Mount Mailboxes Locking Mailboxes Commercial Residential