This long row of townhouses shows a fairly common style of infill housing that has popped up all over the city. After purchasing a long site either from an old factory or a few homes, the developers build these groups of 3 or 4 story townhouses that are usually only about 14 ft wide. The result is a space that has a large amount of its square footage occupied by stairs. I've known a few people who have bought these and then sold them within a couple of years. There is often a roof deck but there are a lot of stairs involved to get up there.