Aluminum wall pergola kit comes in three different sizes

Planter boxes with a pop of color would add just the right amount of detail and accent to the front of this guest house. They would help break up that big facade. There is already a deep roof overhang, so there is no need for awnings. You could get the same effect of further breaking up the facade by painting the upper and lower stories two different neutral colors that complement each other. See the attached picture.