How to Build a Mailbox Post


A mailbox post can be built from brick, cinder block or wood. Of the three, the wooden mailbox post is the easiest to make.The wooden post can be assembled and installed in an afternoon and only a few tools are needed to construct the finished post. Mailboxes are required to be 41 to 45 inches from the bottom of the box to the ground and 6 to 8 inches from the side of the road.

Things You'll Need

  • Railroad tie Saw Treated plywood Tape measure 4 16-penny nails Hammer Drill and screwdriver bit 4 wood screws Rocks or concrete
  • Cut a railroad tie to 60 inches long. You can use a table saw, circular saw or even a chainsaw to cut the proper length. A handsaw will work, but it will take more effort.

  • Measure the bottom of the mailbox you will be using. Most mailboxes have a lip around the bottom of the box. Measure the area inside the lip.

  • Cut a piece of plywood 1 inch smaller than the measured area. You want the plywood to fill the space beneath the mailbox for stability.

  • Nail the piece of plywood on one end of the railroad tie using 4 16-penny nails.

  • Attach the mailbox to the plywood shelf using wood screws and the drill. Use at least four screws, one in each corner of the box. More screws can be used for extra strength, if desired.

  • Install the post and box in the ground by digging a hole 16 to 18 inches deep. Center the post in the ground and fill with rock or concrete and the removed dirt to secure the post in place.

Tips & Warnings

  • If a railroad tie isn't available, buy 4 inch by 4 inch treated lumber, 8 foot long. Measure the final height of your mailbox from the ground before you fill in the hole. This will ensure that your new mailbox meets postal regulations.

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