Required Height from the Floor
Install at specified heights AFF (Above Finished Floor) to ensure USPS installation requirements are met:
- If your installation is for USPS delivery and contains any tenant compartments in the bottom row, the minimum height from the floor is 28 inches.
- If your installation contains no tenant compartments in the bottom row, you have the option to install at a minimum of 15 inches from the floor to be compliant with ADA and USPS requirements.
As we mention in USPS Approved or Private Delivery?, any 4C mailbox on Budget Mailboxes listed as USPS approved already meets these specifications, so your only concern would be to ensure that your installation location is configured properly for the specific 4C you intend to purchase and install.
Numbering Your Tenant Doors
Rather than assigning mailbox ID plates that match apartment or house numbers, sequential or standard numbering may help you meet the accessibility regulations related to your project. Standard numbering may also provide greater security and privacy for residents who do not wish for their home or unit address to be displayed on a specific tenant box. Even so, custom numbering and custom engraving are each available as additional options if standard numbering will not suit your needs.
4C Quick Reference Guide
For more information regarding USPS regulations and our available 4C door height configurations, please see this detailed page.