Home Improvement Questions? Ask a Handyman for Answers
Where do you live? I need pics of the house from a distance please show any walks or other hard scape features. You can post pics here by clicking on ADD FILES next to the SEND button.
Like rick mentioned, knowing the area where you live would be helpful to know what plant/tree could help the best. As you mention it is over the garage, it mean that area can't be planted with a tree, so perhaps a climbing plant or a vine on that facade area would work. it would act as a demarcation and make the house look less like a long oil tanker if you used the same color/material as the original house part.
You could also plant a tree on the other side of the house. A conifer or two like a spruce is usually is a good candidate for that.
You can also play on colors if you can change that easilly (not advised for brick as it then become lot of maintenance) by making the addition lighter than the original house.
Take all the time you need.