Pop-ups are, well, popping up around D.C., often to the chagrin of neighbors and long time residents. With more and more people moving into the District, some developers have taken to adding an addition floor (or three) to existing housing stock. While building up is allowed under D.C. housing code, this controversial option is being spotted more and more in trendier up-and-coming neighborhoods. Although this can mean more housing units, pop-ups change the roof lines and architectural flow of city blocks and are often not well-constructed. This gallery takes a look at some of the best and worst (but mostly the worst) pop-ups around the city.
— Katherine Jessup