What you will need:

  • 1 1.2m x1.2m x 3.6m piece of wood
  • Skill saw
  • Screwdriver
  • 10 7.5cm wood screws
  • Posthole digger
  • Level
  • Carpenter’s square
  • Wood chisel
  • Tape measure


  1. Τhe most important step is to prepare your materials. If you wish the post box to be a certain colour prime, sand, paint and prep the wood now and then leave to dry.
  2. From the piece of wood you will need to cut 3 pieces of wood. The first, the upright, will need to be 1.8m long, the crosspiece will need to be 72cm’s long and the brace will need to be cut at 76cm’s . Use the saw to cut the wood.
  3. Make your detailed cuts. Make a mark 30cm’s from the top of the upright. Make a second mark below this that directly matches the width of the 1.2 x 1.2 On the crosspiece, make your first mark 15cm from one end with a second mark matching the width of the 1.2 x 1.2. Set your skill saw to a depth of 5cm and cut along each of these marks. Use the wood chisel to remove the section of wood.
  4. Assemble the wooden cuts. Lay the crosspiece on the upright so the two cut notches overlap and fit together. If the two pieces do not fit smoothly, smooth the edges with the wood chisel. Making certain the two pieces are square, install four wood screws where the two boards intersect. Now lay your brace section where it will angle down from the crosspiece to the upright. When you have it in place, mark the cuts you will need to make to have the ends fit flush against the two pieces. Use your skill saw to make these cuts; then install the brace using four wood screws.
  5. Now you need to create a hole in the ground for the mailbox. You will want to dig the hole a minimum of 30cm deep. The deeper, the more stability.
  6. Place the upright into the prepared hole. The bottom of the crosspiece must be no lower than 1 metre and no higher than 1.2 metres. Adjust the depth of the hole until the crosspiece is in the acceptable height range. Use the leveller to make certain the post is level in all directions; then either backfill the hole with dirt and pack it in tightly or fill the hole with cement. It may be necessary to install temporary braces to hold the post in place until the cement sets. Once the cement sets, you are ready to install your postbox on the crosspiece.