According to this legal definition:
""That which belongs to something else. Something annexed to another thing more worthy." Cohen v Whitcomb, (1919 142 Minn 20).
...one could consider the balcony as an appurtenance to the building.
Your answer, however, may depend on the context in which the balcony is being considered.
bal-co-ny
Hemenway Furniture Co. Building was created in 1918.
Co-operative Block Building was created in 1909.
Electric Construction Co. Building was created in 1908.
Equitable Co-operative Building Association was created in 1911.
Co-operative Permanent Building Society was created in 1884.
Co-operative Permanent Building Society ended in 1970.
Turner-White Casket Co. Building was created in 1893.
co-workers
Sorry, there is no "Ilph Co" building in any Pokemon game to date, you retard. Your lucky I love pok'mon!
secondary tentant is considered co-tenancy
Silph co is the very large building in saffron city.