The 2010–11 season was arguably the most successful in AFC Totton's history. On 9 February 2011, the Stags played their first match at the newly built 3,000 capacity (although the F.A. recently gave permission to Totton to only allow 2,400 fans to enter the stadium at one time) Conference South standard Testwood Stadium against Paulton Rovers, winning 5–1. The club won the league on the final day of the season with a 1–0 win away at Gosport Borough. Local rivals Sholing finished two points behind Totton in second place, subsequently losing the play off final to Frome Town. On 25 May, Totton and Sholing met in the Hampshire Senior Cup final at the home of Southampton, St. Mary's Stadium. Despite falling behind, Totton produced a superb second half display to win 3–1 and lift the trophy for the second year in a row.
For the 2011–12 season, Totton will play in the Southern League Premier Division.
On November 12, 2011, Totton beat Bradford Park Avenue 8–1 to reach the FA Cup second round for the first time in their history. A record attendance of 2,315 was achieved beating their previous record of 1,746 when Totton played Southampton in 2009. Totton's dream of reaching the third round of the FA Cup was ended as they lost 6–1 against Bristol Rovers in the FA Cup 2nd Round at the Testwood Stadium. Nathaniel Sherborne scored The Stags' only goal.