“Compact spaces are hard, and narrow ones are even harder,” says architect Kip Katich of the 16-and-a-half-foot-wide cottage. “Every design decision impacts the choreography of a narrow space and how useful it can be.”  Photo 5 of 9 in This 30-Square-Foot Addition Makes Room For a Japanese Soaking Tub

This 30-Square-Foot Addition Makes Room For a Japanese Soaking Tub

5 of 9

"Compact spaces are hard, and narrow ones are even harder," says architect Kip Katich of the 16-and-a-half-foot-wide cottage. "Every design decision impacts the choreography of a narrow space and how useful it can be."