In 1907 Lubinski created his own studio in Zagreb. He has designed numerous residential houses in Nazorova, Petrinjska and Masarykova street. Some of Lubinski major projects are, the Lutheran Center in the Gundulićeva street (1909), priests home in Palmotićeva street (1910) and building of insurance company in Mihanovićeva street (1928). Since 1911 until 1913 Lubinski worked on his biggest building project, the National and University Library on Marulić square in Zagreb.