In the 2016–17 season, Glantraeth won a league and cup double by finishing as champions of the First Division and winning the Cookson Cup however, their promotion success proved disastrous as the club were unable to meet new ground requirements for entry into the Cymru Alliance, claiming the cost of renovating their ground would be "absurd". As such, they rejected promotion which led the majority of the club's players to move on, leading the team to resign their position in the league after they were unable to find enough players to start the new season. After missing the 2017–18 season, Glantraeth reformed and entered a team in the Gwynedd League for the 2018–19 season.
