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Install a Mailbox

Boost your home’s curb appeal with a stylish new mailbox. Installation is relatively simple. All you need are a few hours and some basic tools to get a great new look for just a little bit of money.

Tools & Materials

Product costs, availability and item numbers may vary online or by market.

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Roadside Mailbox Replacement

Keep federal regulations in mind when placing your new mailbox. Whether you're replacing an existing mailbox or installing for the first time, make sure it will be easily accessible for your mail carrier. Here are the guidelins for placing a mailbox, directly from the USPS

  • Position your mailbox 41 to 45 inches from the road surface to the bottom of the mailbox or point of mail entry.
  • Place your mailbox 6 to 8 inches back from the curb. If you do not have a raised curb, contact your local postmaster for guidance.
  • Put your house or apartment number on the mailbox.
  • If your mailbox is on a different street from your house or apartment, put your full street address on the box.
  • If you are attaching the box to your house, make sure the postal carrier can reach it easily from your sidewalk, steps, or porch.
Good to Know

Before beginning any excavation, call 811 to check for underground utilities.

Step 1

Dig your post hole deep enough to hold 6 inches of gravel and set the post to support the mailbox at the correct height.

Step 2

Pour about 6 inches of gravel into the hole to allow water to drain properly.

Step 3

Prepare the concrete mix according to manufacturer's instructions.

Step 4

Set the post and fill the hole with the prepared concrete mix. See Setting a Post with Concrete for instructions. Tamp the mix while filling to eliminate air pockets. Make sure the post is plumb.

Watch our DIY Basics videos:

What Do Level and Plumb Mean?

Step 5

Slope the concrete around the base of the post to allow for water runoff. If you want to conceal the concrete, pour it within a few inches of the top of the hole and cover it with soil after the concrete has set.

Step 6

Attach the mailbox to the post. Attachment brackets designed to fit a standard 4 x 4 post are available, but check to see if they come with your mailbox before purchasing them separately.

Step 7

Check that the mailbox assembly is level. Adjust as needed.

Step 8

Label the front and side of the box with your house numbers and name, if you wish. The numbers should be at least 1 inch high.