Until around 2004, the station was listed as Winchester Street to avoid confusion with Summit Avenue stop on the B branch.[2] The B branch stop was closed as part of a pilot program in April 2004 (after which the C branch stop became Summit Avenue) and permanently closed the following March.[3][4][5]
Track work in 2018–19, which included replacement of platform edges at several stops, triggered requirements for accessibility modifications at those stops.[6] Design work for Summit Avenue and seven other C Branch stations was 15% complete by December 2022.[7] Designs shown in February 2024 called for the platforms to be shifted eastward, with access from both Winchester Street and Summit Avenue.[8] In May 2024, the Federal Transit Administration awarded the MBTA $67 million to construct accessible platforms at 14 B and C branch stops including Summit Avenue.[9] As of June 2024[update], construction is expected to be complete in fall 2026.[10]