Belmont station was constructed between 1896 and 1900 as part of the Northwestern Elevated Railroad, opening on May 31, 1900. The station had two island platforms elevated on a steel structure with tracks on either side. Following construction of the Ravenswood branch in 1907 (now part of today's Brown Line), a bridge was constructed connecting the two platforms to allow transfers from southbound services to northbound trains on the branch. The station house was located on the south side of Belmont and contained several turnstiles as well as a customer assistant booth. Beyond the turnstiles was a small caged area leading to stairs; the west staircase led to the southbound platform and the east staircase to the northbound platform. Prior to 1963 there was also a side platform on the west side of Track 1 (the westernmost track), which was used exclusively by the southbound trains of the Chicago North Shore and Milwaukee Railroad.