Follow U.S. Postal Service ® guidelines for installing and placing a new mailbox at your home. Get tips on the best materials to use to set up a curbside mailbox and how to keep it in good condition.

Get details on USPS mailbox regulations and specifications for approved residential and commercial mailboxes that meet postal service standards.

Mar 13, 2024 · Understand mailbox regulations and replacements with this simple guide. Learn how to choose the right mailbox and replace it correctly.

Find out important information about USPS mailbox regulations, laws, requirements, and guidelines, and mailbox design standards. Learn more.

Avoid delays and compliance issues. Learn key USPS mailbox rules every builder needs to know—parcel ratios, ADA rules, and site specs.

Aug 13, 2025 · Get familiar with USPS STD-4C mailbox regulations for design standards and accessibility requirements. Follow our compliance tips for secure mail systems.

Explore USPS FAQs for mailbox guidelines, installation tips, maintenance, locks, keys, and secure mail delivery practices.

Feb 6, 2018 · Guide to USPS regulations for mailbox installation of curbside mailboxes, locking mail boxes, wall mount units and residential package boxes.

Sep 16, 2025 · Use this handy guide to find out about mailbox types, materials and more. Plus, get the USPS (United States Postal Service) mailbox regulations.

Our regulations cover what can and can’t be placed in a curbside mailbox or mailbox outside of your house, which generally includes only mail that has been sent through the USPS.