April 23, 2017 11:36pm
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USPS Mailbox installation Guidelines

Mailbox Guidelines

Installing a New Mailbox

Look for Postmaster General's Seal

Every new mailbox design should be reviewed and receive the Postmaster General’s (PMG) seal of approval before it goes to market. If you opt to construct your own mailbox, it must meet the same standards as manufactured boxes, so show the plans to your local postmaster for approval.

Placing the Mailbox

Here are some helpful guidelines to follow when installing your mailbox:

  • Position your mailbox 41" to 45" from the road surface to the bottom of the mailbox or point of mail entry.
  • Place your mailbox 6" to 8" 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.
 

Installing the Post

The best mailbox supports are stable but bend or fall away if a car hits them. The Federal Highway Administration recommends:

  • A 4" x 4" wooden support or a 2"-diameter standard steel or aluminum pipe.
  • Avoid unyielding and potentially dangerous supports, like heavy metal pipes, concrete posts, and farm equipment (e.g., milk cans filled with concrete).
  • Bury your post no more than 24" deep.

Door Slots

Approved Door Slots

Some homes and apartments have a slot in the door for receiving mail rather than a mailbox. The standards for an approved door slot are:

  • The opening must be at least 1 1/2" x 7".
  • The bottom of the slot must be at least 30" above floor.
  • Horizontal slots must have a flap hinged at the top.
  • Vertical slots must be hinged on the opposite side from the door’s hinges.
 

Inside Door Slot Hoods

The standards for approved inside door slot hoods are:

  • The hood should not project more than 2 1/16" beyond the inside of the door.
  • On a horizontal slot, the hood should not extend below the bottom of the outside plate.
  • On a vertical slot, the hood should not extend beyond the side of the outside plate on same side as the door’s hinges.

 

Maintenance

Mailboxes take a beating from the weather, so we recommend an annual mailbox checkup to avoid damage to your mail or difficulty identifying your address.

 

     

     

  • Tighten loose hinges on the door
  • Take care of rusty or loose parts
  • Replace missing or faded house numbers
  • Keep the path to your mailbox clear


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