When Nady Samnang bought a former parking spot in downtown Washington DC, he was approved to build to the lot lines for a 15-foot-wide home, but then zoning changed and he had to comply with alleyway setbacks meaning his home could only be 6 feet wide.
Nady submitted 23 different plans to the city, before he found a plan inspired by his family camping trips in an RV slide with slide-outs to ask the city for approval for bump-out bay windows. They said yes, and his home now stands at 6 feet across at its narrowest (hallways) and 10 feet at its widest. The kitchen and bathroom are 8 feet across with one bay window and the living room and bedroom have 2 bay windows putting them at 10 feet across.
Nady built the home with his brother Dean and says it took much longer to build because of the narrow alleys surrounding it so everything had to be done by hand. They put in solar and a heat pump so the home generates more energy than it needs.