Mailbox installation may sound straightforward, but did you know that you should consider some USPS guidelines before replacing your old post box?
According to home repair expert Danny Lipford, one has to contact their local post office to get approval for their mailbox's design and location before installation. "The first rule when adding a new mailbox is that your mail carrier has open access to the mail holder at all times." He says that approved mailboxes have "US MAIL" and "APPROVED BY THE POSTMASTER GENERAL" on the front of their door.
This article will provide an overview of USPS mailbox standards for curbside, door slot, and wall-mounted mailboxes that fit the local guidelines.
Size and Construction Standards for Curbside Mailboxes
→ Custom-built mailboxes: If you plan to get rid of your existing post-mount mailbox and build a new metal one, contact USPS to get the approved measurements. Want your mailbox to hold larger packages? Ask about custom package delivery boxes, as they have unique guidelines and may fall under different USPS regulations.
→ USPS post-mount mailbox specifics: The United States Postal Service clearly defines post-mount mailbox placement guidelines here. The proper location for post-mount mailboxes is 6" to 8" back from the curb and 41" to 45" above the road surface. Measure up from ground level to the mail slot to see how high it is. Contact your local post office for guidance if you live in a location with no raised curb.
→ Magnetic mailbox numbers: Attach your house or apartment address to your post-mount mailbox/wall-mount mailbox using magnetic mailbox numbers, which can be found here. If your home is on a different street from your wall or post-mount mailbox, add your full address to the post box to avoid delivery confusion and missed mail. Learn how to install your magnetic house numbers in this blog.
→ Mailbox post requirements: Post-mount mailboxes must have a 4-inch by 4-inch wooden post or at least a 2-inch thick aluminum or steel post for support, as per Federal Highway Administration standards. Materials that offer strong mailbox support but are still breakable in case of damage are recommended, so steer clear of brick, iron, or concrete mixes. Find the approved Post & Porch mailbox post here.
Modern Mailbox Maintenance
As with everything else on their property, homeowners are responsible for maintaining and repairing their mailboxes. As such, it's best to check your modern mailbox yearly!
Has it become difficult to open and close? Does it look worn? Do you need a replacement?
If unsure, then here are some things to remember when you do your mailbox check:
→ Look for loose hinges on the mailbox door and mailbox slot.
→ If some mailbox parts have rusted or come loose, Post & Porch has you covered.
→ Clean up any pesky mailbox stains with products like Wet & Forget Outdoor.
→ Replace magnetic mailbox numbers that have faded or loosened.
→ Keep the path by your modern mailbox clean. Make sure nothing blocks it from view, like shrubs or outdoor curb appeal decor.
→ Add outdoor wall lighting and fake succulents for a bit of visibility and greenery.
→ Contact your local post office before moving or replacing your mailbox entirely.
Want more info on keeping your mailbox clean? Find our easy guide in this blog.
More Mailbox Installation Guides From the Post & Porch Blog
→ The Only Mailbox Installation Guide You Need
→ How to Install a Mailbox Post
→ How to Install The Garden Wall-Mounted Mailbox
→ The Step-by-Step Guide to Installing a Locking Mailbox Insert
→ How to Install Your Post-Mount Mailbox With Concrete
→ How to Install Your Modern Mailbox Post Into the Ground
Shop Post & Porch's Curb Appeal Accessories Today
Your home’s first impression should feel intentional, homey, welcoming, and uniquely yours.
Post & Porch makes it easy with mix-and-match curb appeal accessories that look beautiful together and stand up to real life.
This is what you can expect from Post & Porch products:
→ Thoughtful Design: Clean, modern lines that complement any home’s unique exterior.
→ Durability That Lasts: Powder-coated steel, UV-resistant finishes, and weather-ready 24/7.
→ Easy Installs: Tool-free or simple hardware setups you can do in minutes (or even seconds).
→ Cohesive Styling: Modern mailbox, address plaque, planter pots, outdoor wall lighting, and house numbers are designed to coordinate. Mix and match – play with your curb appeal!
→ Helpful Support: Friendly guidance, fast shipping, and 30-day exchanges.
See what makes Post & Porch stand out against big box stores here.