The club was founded in 2004 through a merge of Atlético Boadilla FS and CFS Las Rozas, taking the seat of Atlético Boadilla in División de Honor. Las Rozas finished the season 2004–05 in 15th position, being relegated to Division de Plata. In 2008, they were forced to play in Primera Nacional A, due the economic limitations. In 2009, they reached an agreement with Ciudad de Móstoles FS, for plays her home matches in Móstoles and as Boadilla Las Rozas/Móstoles Mirasierra. The partnership agreement was broken in summer 2011. For 2011–12 season, UD Las Rozas Boadilla did not play with first team, playing just with youth teams, coming back for 2012–13 season in Tercera División.