According to local legend, the structure was built as a “spite house” shortly after the Civil War:
… two brothers inherited land from their deceased father. While one brother was away serving in the military, the other built a large home, leaving the soldier only a shred of property that he felt certain was too tiny to build on. When the soldier returned, he found his inheritance depleted and built the narrow house to spite his brother by blocking the sunlight and ruining his view.
Another source states:
Not much is known about the city’s narrowest house. Legend has it that … its unnamed builder erected it to shut off air and light from the home of a hostile neighbor (also nameless) with whom he had a dispute. … Believed to have been built after 1874
One particular spite house in Boston: https://en.wikipedia.org/wiki/Skinny_House_(Boston)#History
There’s a Spite House in Seattle, WA, too. Spite from coast-to-coast!!
https://www.atlasobscura.com/places/montlake-spite-house
Space Ghost approved
Those were some nearly useless photos shown
That actually looks quite spacious for a big city. Where is the front door? Is there a site with more pics?