Prior to its creation on Jan. 1, 1932, Route 205 was known as part of State Highway 144. Since 1932, the only change has been a realignment, to make a curve smoother, at Gorman Road in Brooklyn.
CT 205 Sources
"Backs To The Wall." Hartford Courant, Jan 11. 2000. (Discusses ConnDOT and the issue of rebuilding centuries-old stone walls when rural highways are upgraded)