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How to Install a Mailbox Post Straight and Solid
Know the USPS (and HOA) rules
USPS wants the bottom of the box 41 to 45 inches off the road and the box face 6 to 8 inches back from the curb. Many Broward HOAs also specify a style or color — check before you buy so you only do this once.
Dig and set in concrete
Dig about 24 inches deep, add a few inches of gravel for drainage, set the post, and pour concrete. A post that leans within a month was set too shallow or without concrete — this step is the whole job.
Brace plumb while it cures
Level the post in both directions and brace it, then let the concrete set before you hang anything on it. Mounting the box while the concrete is wet is how you end up with a crooked mailbox.
Mount the box square
Attach the box level and centered, add your house numbers, and you’re done. Replacing a post that got hit or rotted, or just want it dead-straight? We install mailbox posts across Broward.
Frequently asked
What height should a mailbox be?
USPS specifies 41 to 45 inches from the road to the bottom of the box, set 6 to 8 inches back from the curb.
Do I need concrete for a mailbox post?
For a post that stays straight, yes — set it about 24 inches deep in concrete. Tamped dirt alone tends to lean.
How deep should the post go?
About 24 inches, with a few inches of gravel below for drainage, then concrete.
Will it meet my HOA rules?
We set it to USPS spec and work within your HOA’s style requirements — check those before buying the box.