You can't really see it, but there is a young clematis vine on a trellis to the right of the garage, but I do love the idea of incorporating wisteria!

Wisteria is probably a no go on the house itself anyway as we will be painting this summer. I would love an arbor but there's not enough room on the pathway to post the structure

Window boxes. It looks like you don't get much sun so look for shade loving plants and flowers if that's the case.

What is your zone and what direction does it face? Do you have acidic soil?

I love the idea of window boxes!!! The front yard is shady with some sun. I am zone 6, not sure about the soil.

You have room to plant shade annuals like Impatiens and Begonias in front of the Hosta.