The headquarters is located at the Svanemølleanlægget at Østerbro after previously having their residence at the national football stadium.

Due to historical reasons a number of older clubs from other municipalities are also member of the association.

[2] The football associations in the surrounding areas, Amager Boldspil-Union (founded 1912), Nordre Birks Boldspil-Union (founded 1913), Valby Boldspil-Union (founded 1913) and Nørrebro Boldspil-Union (founded 1916), merged to form Københavns Forstadsklubbers Bold Union (KFBU) in 1916 and after intense negotiations, KFBU eventually became a provisional member of KBU and ultimately in the period spanning from 1921 to 1923 the clubs from the football associations of Amager, Valby and Nørrebro became full members of KBU, while the clubs of Nordre Birk became members of Zealand Football Association (SBU).

[6][7] As a consequence of the capital's increasing development and growth at the end of World War I, disagreement between the Zealand FA and KBU arose regarding the membership of clubs located at the border between the two football associations.

[2] The most general views was that clubs playing in the metropolitan area of Copenhagen should be members of KBU, while clubs in the northern part of the metropolitan area, Nordre Birk (Gentofte, Gladsaxe and Lyngby-Tårbæk) should be members of SBU.

[8] This resulted in some unclear results and as a direct consequence of Akademisk Boldklub being forced to switch their membership from KBU and SBU on 1 January 1962, the agreement was temporarily terminated by KBU effective at the end of 1965, even though SBU did not accept the termination.

[2] The organization's first residence was an office in the 'Fælledklubhuset' on the other side of the grand stand, that was part of Københavns Idrætspark.