In 1947–48 Horsham reached the First Round Proper of the FA Cup for the first time, taking a first-minute lead against Tommy Lawton's Notts County, before losing 9–1.
However, the team beat Maidenhead United 4–1 to reach the Second Round Proper of the FA Cup for the first time where two matches were played against eventual League One champions, Swansea City.
Financial cutbacks at the end of the 2010–11 campaign, during which they finished only 6 points clear of possible relegation back to Division One, saw Horsham part company with long serving manager John Maggs after 11 years in charge.
A lack of improvement in results, during which the club failed to win any of their 19 league games, saw Langton replaced by former Worthing boss Simon Colbran in March 2012 but he was unable to prevent the side from returning to Division One South.
Charman steered the club to 16th place but a poor run of results the following season led to him being replaced by two more former players, Anthony Storey and Cliff Cant, in January 2015.
Despite some impressive initial results, the pair were unable to save the club from relegation so former East Preston manager Dominic di Paola was appointed towards the end of the campaign with a view to rebuilding a side capable of competing in the Sussex County League for the first time since 1951.
Hopes that the club might start the 2018–19 campaign in the new ground went unfulfilled but the disappointment did not seem to affect the players who turned Culver Road into something of a fortress, losing just four matches in all competitions – two of them to higher-league opponents Bath City and Eastbourne Borough.
With automatic promotion the right of only the champions, Horsham faced a play-off semi-final clash with Haywards Heath Town – the only side to have recorded a league double over them during the campaign – and duly won 3–0 to set up a home final with Ashford United.
The 2021–22 season was the first fully completed campaign at the new ground, after the previous two had been cut short by the Covid outbreak, and Horsham made their fourth appearance in the FA Cup first round, losing 2–0 to Carlisle United.
However, Horsham would receive a new lease of life, as Barnsley fielded a player in the replay who had been on loan at York City at the time of the first meeting, thus making him ineligible.
Barnsley were subsequently expelled and Horsham replaced them in the second round where they were drawn at Sutton United, ultimately falling for a second time in that year's competition, losing 3–0.
There was heartbreak in the league, though, when they again created a record by finishing a club best fifth in the Isthmian Premier Division only to lose out to Chatham Town[6] on penalties in the Play-Off semi-final.
The initial proposal, which would have seen the installation of two 3G pitches and a two-storey clubhouse, returned a majority verdict of 13–9 in favour of rejecting the application at a council hearing on 20 Jan 2015, citing issues such as safety concerns and the perceived construction of a 'business in the countryside', despite the site already hosting a golf club and fitness centre.
On 21 March 2017 the submission of a revised plan for a single-storey clubhouse and suitable for a FA Grading Category "C" with an initial capacity of 1,980 was overwhelmingly accepted by 19 votes to 1.