New manager Ted Fenton began to assemble a team of professionals following the reliance on guest players during the 1945–46 season, as the club finished 8th in the league.

They reached the first round of the FA Cup, but were defeated by Football League side Reading.

During the season, the stadium had its Main Stand extended, and the property behind what would become the Barside was purchased to overcome disputes regarding access by supporters to that side of the ground.

Meanwhile, the Main Stand had a boundary wall built that would prevent supporters attempting to enter the ground without paying.

[46] Players making their first-team Colchester United debut in a fully competitive match.