The St. Petersburg Union of Composers was founded in 1932. Amongst its members in its first decade of existence were established composers including B.V. Asafyev, V.M. Bogdanov-Berezovsky, A.P. Gladkovsky, V.M. Deshevovov, A.F. Pashchenko, Oles' Semyenovich Chishko, Y.A. Shaporin, D.D. Shostakovich, and young musicians B.A. Arapov, B.G. Holz, I.I. Dzerzhinsky, Y.V. Kochurov, V.V. Pushkov, G.N. Popov, V.P. Solovyev-Sedoy, M.I. Chulaki. Chairmen of the Union have been: the musicologist B.A. Fingert, as first chairman; V.V. Shcherbachev, I.O. Dunaevsky, D.D. Shostakovich, Chulaki, Solovyev-Sedoy, A.P. Petrov and Grigory Korchmar. From 1964 for almost 30 years Andrei Petrov was the head of the St. Petersburg Union of Composers. The Leningrad Department of the Union of Composers continued its work during the siege of 1941-44. In the 1960-80s, S.P. Banevich, G.I. Banshchikov, Veniamin Yefimovich Basner, V.A. Gavrilin, L.A. Desyatnikov, A.A. Kneifel, A.N. Kolker, S.M. Slonimsky, B.I. Tishchenko, V.A. Uspensky, G.I. Ustvolskaya, Y.A. Falik, I.I. Schwarz and A.B.Zatin became members of the Leningrad Department of the Union of Composers. These composers and musicians played an outstanding role in the musical life of the city in the last third of the 20th century. Since 1964, the St. Petersburg Musical Spring festival has been held annually. Since 1989, the Children's Musical Festival has been organised which includes children's competitions: the Bruk and Taymanov memorial Competition of Piano Duets, Brother and Sister, and the Gavrilin Competition ‘I Am a Composer’. In 2003 the Petersburg Department of the Union of Composers had more than 210 members.
In the 1930s, the Leningrad Department of the Union of Composers was located at 2 Rossi Street. It moved in 1948 to its present location at 45 Bolshaya Morskaya Street, the former mansion of Princess V.F. Gagarina. This mansion was built in the 18th century, rebuilt in 1835-40 by architect Auguste de Montferrand and in 1873-74 by architect I.V. Strom and M.E. Messmacher. It also houses the Board of Directors, the Administration of the House of Composers, a concert hall, a cinema hall, musical and book libraries, a record library, a hotel and a publishing house Kompozitor.