What Are the Requirements for a Curbside Mailbox?

Black mailbox with 6093 number on it.

I’m installing a mailbox at the curb. How high should it be, and are there other postal service requirements? -Tom

Hi Tom,

You should start by contacting your local post office to make sure the mailbox and location you would like to install it meets with their approval. Here are some general guidelines for a curbside mailbox:

  • The bottom of the mailbox should be from 41” to 45” above the road.
  • The front of the mailbox should be set back 6” to 8” from the curb.
  • The lettering for the name and address on the mailbox should be at least 1” high.
  • The box must be located on the right-hand side of the road in the direction the mail carrier will be traveling.

Good luck with your project,


Further Information


  1. All curbside mailboxes should be located so when the carrier stops for delivery his/her vehicle will not be blocking a driveway. A safety issue.

    Supervisor, Delivery & Collection

  2. And if you’re in the market for a new home, LOOK TO SEE if the neighborhood has mailboxes. Many new subdivisions are being built with cluster boxes-the Post Office is no longer offering house to house delivery for many new subdivisions. So if no one else has a box, you’ll need to figure out where the cluster boxes are.

  3. While it isn’t a requirement, it’s a good idea to check with the carrier and see if he/she has any ideas. Sometimes a very small adjustment can result in making their job easier, and they don’t forget that.

  4. I have a question about a mail box. We just moved in to this house and the Neighbors across the street has there mailbox behind our driveway and when, we back out we have to avoid hitting it. The driveway is not where the mail box is. Not sure what to do or if there is anything we can do. My brother just hit the mail box backing out of the driveway.

  5. What rights do I have when people across the street keep parking in front of my curbside mailbox not allowing postal service car access to deliver my mail to my mailbox? I live in North Carolina on a private road and no amount of talking to these people gets me anywhere! Thank you.

  6. I have been living in my home 3 years. Never a problem. Numbers on the side of the box 2 inches high. Mail carrier took the liberty if writing the numbers on the front of the box with magic marker. Post Master told me she has the right to write numbers on the box. I asked why this wasn’t a problem for three years? Also said if it was a problem a simple note asking me to apply number on front of the box would have been all it would have taken. He said they have the right to do anything they want to my mail box. After all I bought it, paid to have it installed but I have no rights when it comes to labeling as how the mail box looks now with numbers scribbled on the front.

  7. Thanks for explaining what a curbside mailbox needs to have. I didn’t know that the front should be set back about 6″ to 8″ from the curb. I wonder if it could be set back farther, depending on the layout of the property.

  8. I had 2 mailboxes at my house. One mail goes directly into my house and one by my garage. I kept having my mail stolen so I got rid of the one by my garage. So now they stopped delivery mail to my house. I asked th supervisor why they are holding my mail, she said because I moved that box. Is that correct. Also the box was removed over a year ago.


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