A method for installing an offshore wind turbine system (10) includes driving a cylindrical annular monopole(24) into the soil. The monopole(24) includes a flanged portion (36) configured to support awind turbine tower (20). The flanged portion (36) extends radially from a peripheral surface of the monopole(24). The method further includes mounting a wind turbine tower (20) directly on to the monopile(24), wherein the wind turbine is supported by the flanged portion (36) of the monopile(24).