Some texture and stone cladding would be one option.

What if you just painted a large grey rectangle on the wall to balance the other grey geometric shapes of the rest of the house?

How about adding some wood to the wall like three tall screens

i think just a large tree will do.
can some one add a large green tree to the picture and post it so we are able to see how much room will be left / if they were to add anything else?!
thnz

Needs the vertical accent Rina suggested, but you can accomplish the same thing with any gray material. Tile, gray stone tile, or even glass block with a gray backdrop, lighted from the back, nice accent.

I Like Tina's idea but I would make it a shorter rectangle leaving the same space ay the bottom as there is from the window to the roof,
Using texture or stone the same colour as the darker paint colour.
I think it would give a better balance.

How about a very simple modern mural?

What is happen in the interior behind the "dead" wall? If you are just finishing up the construction is it too late to add a window?
What is the material on the second floor gray box?

HI -- Great house ... just the style I would like for myself . There are decorative exterior tiles that would look nice and be different . They are a large format tile . Or have an Artist do a tile mural . I could also see that whole wall clad in some real stacked ledge stone in a natural color . But it would also look nice to just plant a decorative tree - like a Japanese Maple (zone ?) and it would add a bright spot of color (red ) , which would look wonderful against that white wall . And add some up lighting to whatever you choose to put there .

hey guys sorry that I have not replied but we have been overseas and I am only reading all the replies now. thank you everyone for your imput. Rina I love the planter box idea and bringing the grey in to balance it out.

That's great, Kevin. I hope the trip was good. Happy New Year to you.