Route 262 was commissioned in March 1963 from South Street and its southward continuation along Spruce Brook Road. It originally ran from Waterbury Road in Thomaston to US 6 in Plymouth. In 1964, with the opening of the Route 8 freeway from Waterbury to Thomaston, Route 262 was extended south along the former route of Route 8 to Huntingdon Avenue in Waterbury. In 1965, it was truncated back to Spruce Brook Road in Waterbury. In 1975, the Watertown section of Route 262 was added, using former SR 824 and SR 855. In the same year, the section between Lake Plymouth and Tomlinson Road in Plymouth was realigned.