Coastal Mailbox Co. | Custom Coastal-Style Mailboxes in Florida Coastal Mailbox Co. offers premium, marine-treated wood mailboxes designed to elevate the curb appeal of Florida homes. Built with a durable, three-piling coastal design, each mailbox combines timeless style and lifetime durability to withstand coastal elements. Since 2018, we’ve crafted custom mailboxes that bring unique charm and lasting quality to every home.