That awful eye sore builder's always seem to put in the most obvious places even when there's an attached garage, or a basement, or even a large closet somewhere.
Well. I've come up with a great solution. Make it Art. Build a frame out of 1x2's and secure it to the wall around the box. Then build another frame out of door trim, or whatever trim you like, and attach it to the first frame with hinges.
But, it's better than staring at that ugly gray box :)