Upon its inception ARSO was hosted by Ghana until the political upheavals necessitated its movement into Kenya. ARSO has been hosted by the Government of the Republic of Kenya, through the Kenya Bureau of Standards in Nairobi, Kenya since 1981 based on the Headquarters Agreement signed between the Government of the Republic of Kenya and ARSO.
The offices of the Central Secretariat are based at the 3rd Floor of International House, Mama Ngina Street, within the Central Business District of Nairobi City.