It was closed from April 2021 to January 2022 as part of adjacent construction on a Brookline High School building, which included renovations to make the station accessible.

In the early 2000s, the MBTA modified key surface stops with raised platforms for accessibility.

Brookline Hills was not among those initially outfitted with portable lifts, nor was it retrofitted with raised platforms.

These platforms were installed at eight Green Line stations in 2006–07 as part of the settlement of Joanne Daniels-Finegold, et al. v.

[12] Construction began in late 2019; the station closed on April 12, 2021 for the final phase.