The celadon house at 44 Hull Street in Boston’s North End neighborhood has handsome exposed brick and a bathroom with vivid blue tiles. It boasts a lush, green private yard and enviable views from the roof deck. Charming amenities, for sure, but not the most notable things about this house. It’s narrow—really, really narrow. Blink-and-you’ll-miss-it narrow. Stretch-your-arms-and-brush-both-walls-narrow. It’s so narrow that previous owners had to saw their box spring in half to coax it upstairs, and even then only managed to wedge it in their bedroom by shoving it through…
