Forget the Arbor - like the door! Garage Door Arbor great way to increase curb appeal is with an arbor over the garage door. A manual post hole digger i.
Enhance an existing structure with a pergola! They are commonly freestanding structures, but you can attach a pergola onto the side of your house, shed or garage, too. It's a great way to save space and add interest to an otherwise ordinary wall.
This would actually be a "front yard" project but I like the look of the arbor over garage doors. Could do matching Arbor in side yard for curb appeal.