The 1955–56 season was unremarkable on the pitch but did see further advances around the ground as Carshalton Athletic's success of recent season was reflected in the size of the supporters club with over 2000 members. A somewhat rare Tonbridge attack on 79 minutes saw Jason Williams with an opportunity to put his side in the lead but he couldn’t quite get the ball under control. Despite the poor league form there was much to celebrate in the FA Trophy with one of the most historic results in the club's history when they beat Lincoln City 3–1 at Colston Avenue, Paul Vines scoring a hat-trick. 2011–12 was a mixed year for the club overall. With the upheavals of the Second World War in Europe over, preparations for the resumption in football at Colston Avenue began 1945 with applications made to join the London League (senior side) Surrey Intermediate League (reserve side) and to enter the London Senior and Surrey Senior cups.
Behind the scenes the club was taking steps to improve the club's chances on the pitch including hiring a coach for all sides for the first time but the club committee ensured that they retained the final say in selection decisions.
Carshalton Athletic were awarded the Community Club of the year award and became one of the largest community clubs in the UK with over 40 junior/youth teams including 7 girls/ladies teams.
At the same time the club gained Football Association senior club status and this allowed Carshalton Athletic to enter FA national competitions and county senior cups for the first time. Sadly for The Robins, an 85th-minute penalty was saved by Staines 'keeper Louis Wells, and Scott Taylor scored an extra-time winner for Staines. Following the reformation of the club on 31 March 1919, and after playing on a number of different grounds, Carshalton Athletic finally moved into their new (and current) home in Colston Avenue during the 1920–21 season.
But Carshalton were certainly not in awe of their National South visitors and created several decent chances with Angels keepers, there were substitutions during this period, Tupper and Ted McDonald both kept busy. A temporary ground was loaned to the club by a market gardener named G. Mizen, in what was known as Culvers Park (now covered by housing as Culvers Avenue) and it was here that the club resumed playing in the Southern Suburban League. Registered number IPO 32445. In 2015, Carshalton Athletic replaced their grass pitch with an artificial, 3G pitch,[10] after winning planning permission beforehand. The best that could be offered to supporters in this period was a solitary cup run as the club reached the second round proper of the FA Challenge Cup for the first time before losing 4–1 to Fourth Division Torquay United. Carshalton went on to win the Corinthian League title by 3 points from Hounslow Town at the end of the season and the reserve team finished second in their league, 2 points behind Uxbridge.