Pop-ups don't have to be ugly. Yes, some of these upward additions on non-contributing houses to historical neighborhoods can be eyesores like this one on V Street, but there are also several that fit in nicely with the existing building below. These two on Q Street do not. It's not only that the siding over the painted brick is aesthetically displeasing, but as Twitter user @jtedc shows us in close up photos, the construction is poorly done. The barrier between homes actually shifts several inches to the left once the top stories are reached and the window on one pop-up unit looks slightly lopsided.