How To Build A Custom DIY Mailbox

How To Build A Custom DIY Mailbox

May 29 2018

DIY Custom Mailbox

Your home is a large investment and as a fellow homeowners, we know the importance of curb appeal. Often, the first thing people see is your mailbox post, so if it is in disrepair, we have a suggestion for a simple 4" x 4" styled mailbox post. It is a great project for the spring or summer and the finished product can be as detailed as you want it to be - let’s get into the materials!

1 - 4" x 4" Pressure Treated or Cedar Wooden Post (10" Foot Long)
1 - Mailbox - can purchase at your local hardware store
Exterior Fasteners (Galvanized or Stainless) / Exterior Stain or Wash
4” x 4” Fence Armor
& Any Personalized Accessories

Step 1:

If you have an old mailbox, be sure NOT to throw it away! It can look as good as new with a fresh coat of exterior grade paint!

Step 2:

This is very important! Before you start measuring and cutting, you need to make sure you are meeting the specifications of the United States Postal Service (USPS). If you would like to read more, head to for further instructions.

If you are in Canada and want to know about the Rural Mailbox Guidelines, visit: .

If you plan to dig on your property, whether you are in the USA or Canada, it is very important to call before you do so! This step can’t be missed because you need to know if there are any unseen utility lines on your property - hitting one can cost you.

Step 3:

Plan..Plan..Plan…It is crucial to plan out EVERYTHING before you make any cuts.

Now, when you begin building, you will need to have a set design you want to follow (as there are endless options). You will need to cut out notches in the horizontal and vertical lumber, so they are able to connect. The notches or mortise will need to be cut at half of the depth of your lumber, so it fits snugly, perpendicular to each other. A circular saw is the fastest tool for this and you will want to step it across the mortise. Then, chisel out the pieces with a hammer. This can also be done with a hand saw, but it will just be more labor intensive.

The rest of the design is where you can get creative and make it personalized to you! When doing this, make sure it adheres to the covenants you have with your HOA or Condo Association.

Step 4:

Once you have the notches and any other lumber cut for your design, you can slide the arm into place with exterior grade glue and the proper fasteners. It is important to know that you must have a 45-degree angle support.

Step 5:

Set your post where you would like it. How you install the post depends on your terrain.

Remember to follow your postal guidelines. For further information, you can visit:

Step 6:

You have crossed the finish line! If your post is near grass that will come in contact with a weed trimmer, we strongly suggest installing Fence Armor.

If you are interested in giving your mailbox post itself some personality, you can personalize it with our Patriotic Edition where we have your house number embedded.

For more information, do not hesitate to call us at (888) 289 - 5617. Ask for Al directly.

You are now left with a beautiful mailbox post and eye-catching curb appeal. We hope you enjoy it for many years to come and can pass on this guide for others to make one for their home.

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