Layout Q regarding built-ins

I was planning to have custom built-ins made for my parlor-level living room. Unfortunately, the price is a little out of my comfort level. One of the companies suggested starting with just one built in, since I’m planning on having 2 sitting areas anyway (a more formal area near the windows and a family room set-up in the middle w/ kitchen at the back). do you think this would look strange to have just one built-in bookcase on one side of the fire place?

By AEPE |