If that's a city or municipality thing you're going to have to go ask them if you can indeed put anything near it like trees and such. If it's running cables underground they might not allow trees to be placed nearby due to roots possibly growing near the cables and putting pressure on them.I'm wanting to hide that green box with some raised terrain and a rock facing, and having the box hidden within bushes, but still be able to have access to it.
But if you can, definitely hide it.
Nice house