Installing a double mailbox post is a practical solution for homeowners who share an entrance with a neighbor or manage multiple delivery points without sacrificing curb appeal. This setup allows two separate mailboxes to hang from a single, sturdy structure, maximizing utility while maintaining a cohesive look along the street. The process involves careful planning, the right materials, and precise installation to ensure long-term stability and compliance with local postal regulations.
Planning Your Double Mailbox Post Layout
Before driving a single post into the ground, you must evaluate your space and understand the requirements set by your local postal service. Measure the distance between existing fixtures, check for underground utilities, and confirm the recommended spacing to avoid delivery issues. A solid plan at this stage prevents rework and ensures that both boxes remain easily accessible for mail carriers and residents alike.
Choosing the Right Location
The ideal spot for a double mailbox post is along the driveway or near the street address, where visibility and access are optimal. The surface must be level and firm, such as compacted gravel or concrete, to prevent sinking or tilting over time. Avoid low-lying areas prone to flooding or snow accumulation, as moisture can compromise the post's integrity and the functionality of the boxes.
Selecting Materials and Hardware
Durability is key when building a double mailbox post, especially since it must support two boxes and endure constant use. Opt for pressure-treated wood, such as cedar or pine, or choose metal or PVC posts designed for outdoor use. Pair these with rust-resistant brackets, galvanized screws, and heavy-duty mounting hardware to ensure the structure remains secure in all weather conditions.
- Pressure-treated 4x4 or 6x6 post (8–10 feet long)
- Dual mailbox mounting bracket or two single brackets
- Concrete mix for setting the post
- Galvanized lag screws and washers
- Level, shovel, and post-hole digger
- String line and measuring tape for alignment
Spacing and Height Considerations
Standard mailbox height is between 41 and 45 inches from the road surface, and double mailbox posts should align with this range to meet postal guidelines. The two units are typically spaced 8 to 10 inches apart, allowing enough room for larger envelopes and packages while keeping the structure balanced. Mark these measurements clearly before setting the post to avoid adjustments later.
Installing the Double Mailbox Post
Begin by digging a hole that is one-third the length of the post and wide enough to spread concrete evenly around the base. Set the post in the center, use a level to ensure it stands straight, and secure it with temporary braces. Once positioned correctly, pour concrete into the hole and let it cure according to manufacturer instructions, checking periodically that the post remains upright.
Attaching the Mailboxes Securely
After the concrete has fully cured, mount the double mailbox bracket or individual brackets onto the front of the post, aligning them with the designated height and spacing. Slide each mailbox into place and fasten it using the provided hardware, ensuring that the doors open smoothly without interference. Check that both units are secure and that the upper edge of each box is below the bottom of the door to protect mail from weather.
Final Checks and Long-Term Maintenance
Once installation is complete, test the stability of the structure by gently shaking the post and opening each mailbox door. Verify that your local postal carrier can access both units without difficulty and that no obstructions interfere with delivery routes. To preserve the appearance and functionality, inspect the brackets and seals annually, tighten screws as needed, and repaint or reseal wooden posts every few years to protect against the elements.
:strip_icc():focal(626x737:628x739)/inserting-mailbox-structure-to-ground-ccd4ef84-2f7063f038274c4793882788a0af5d15.jpg)
