16 Door Cluster Mailbox CBU with 2 Parcel Lockers, Pedestal Included - USPS Approved

This unit ships with every component needed for a complete installation. Here's what's included and how it's built:

• Finish: Powder-coated, corrosion-resistant aluminum.
• Colors: Green, White, Sandstone, Dark Bronze, Black, and Grey.
• Assembly Required: Yes: the CBU cabinet and pedestal ship in two separate boxes
• Arrow Lock for USPS: Yes: the master-loading door is prepped for the USPS-provided Arrow lock, installed by postal officials after placement is confirmed
• Dimensions: 30.5 in. W × 18 in. D; 62 in. total installed height with pedestal; crown measures 30.5 in. W × 18.5 in. D
• Outgoing Mail: Yes: solid aluminum outgoing mail compartment with a 12 in. W × 3/4 in. H weather-protected slot
• Number of Keys Included: 3 keys per tenant door; a 16-door unit ships with 48 keys total
• Master Lock: Prepped for USPS Arrow lock; the USPS provides and installs the master lock (not included with purchase)
• USPS Approved: Yes. Postmaster confirmation of placement is required after installation before mail delivery can begin.
• Parcel Lockers: 2 fully integrated parcel lockers with captive key system
• Warranty: 5 years against manufacturer defects
• Origin: USA-manufactured

Every CBU sold on BudgetMailboxes.com is built to deter mail theft at the construction level. These aren't add-on features—they're engineered into the unit itself.

The cabinet uses high-precision robotic welding and aircraft-quality aluminum throughout. Security is built in at every access point:

• Anti-pry master door: A vertical bridge with an interlocking overlap eliminates the gap between the two master-loading doors, leaving no pry points on the exterior
• Cam locks: Heavy-duty, tamper-proof locks latch through the aluminum frame on every tenant door, each fitted with a dust and rain shield
• Five-pin cylinder lock: Each tenant door uses a heavy-duty five-pin cylinder cam lock with 3 keys. Individual locks can be replaced in minutes if needed
• Anti-fish outgoing mail slot: A sloping weather hood over the solid-aluminum slot frame blocks hand insertion and shields deposited mail from prying tools
• No exterior removable fasteners: The unit's exterior is designed without accessible removable fasteners, eliminating a common tamper point
• Sloped roof with drip-edge: Channels water away from the front slots and prevents moisture buildup that degrades door seals over time
• Parcel locker captive key system: Once a tenant inserts the key to open a parcel locker, the key cannot be removed. Only the postal carrier retrieves it during the next delivery, preventing unauthorized locker access between visits

Required: USPS STD-4C compliance is confirmed at the unit level. Placement and final Arrow lock installation require local postmaster approval after the CBU is installed.

Who This Unit Serves

Property managers, developers, and HOA boards choose the 16-door CBU when a project requires centralized mail delivery for exactly 16 units. It's the right fit for:

• 16-unit residential developments
• Apartment complexes requiring centralized delivery
• HOA communities with shared mail infrastructure
• New subdivisions under USPS STD-4C requirements
• Commercial properties with multi-tenant mail needs
• Any site where the local postmaster requires a CBU over individual curbside mailboxes

How Budget Mailboxes Outperforms Comparable Retailers

This is a USPS-approved Type III cluster box unit built for 16 tenants. The unit itself is the same wherever it's sold online. What sets Budget Mailboxes apart is what comes with the purchase:

• Price-match guarantee: Found the same unit cheaper at another online retailer? Budget Mailboxes will match it. Send us the competitor's price and we'll verify and match it, backed by our CBU Price Match Guarantee.
• Transparent volume pricing: Budget Mailboxes publishes tiered volume discount pricing directly on product pages—no phone call required. For developers managing multi-building installations, that's a meaningful planning advantage.
• Professional installation at checkout: Licensed, insured installers are available as an add-on within the 48 contiguous states. We are proud to be one of the few providers offering this service.
• Pro-Rewards Loyalty Program: Free to join. Members earn 1 point per dollar spent plus a 500-point sign-up bonus. First orders of $3,000 or more earn a 2,500-point bonus, and members receive a $50 coupon every year on their account anniversary.

Builders and property managers should review these requirements before the unit arrives.

The CBU cabinet and pedestal ship in two separate boxes via freight carrier. The freight carrier will call to schedule delivery, and someone must be present to inspect the shipment and sign for it.

Installation requires a flat, poured concrete pad meeting USPS specifications. For a newly poured pad, the pedestal is secured with stainless steel L-bolts (1/2 in. diameter, 7 in. overall) set into the wet concrete. For an existing slab, galvanized steel masonry anchor bolts (1/2 in. × 5.5 in. minimum) are the approved hardware. Two people should mount the cabinet onto the pedestal. One person holds the cabinet in place while the other fastens it. Slide out the parcel locker access plates to reach the four top bolts, tighten the nuts with a 9/16 in. socket wrench, and then replace the access plates.

After installation, contact your local post office. The USPS will schedule Arrow lock installation for the master-loading door. Mail delivery cannot begin until the postmaster confirms placement and completes that step.

For a complete step-by-step walkthrough, see our full Cluster Mailbox Installation Guide.