Image courtesy of Boston Properties and Sasaki

Updated redevelopment plans for Boston Properties’ Blue Garage property in Cambridge’s Kendall Square call for a 38-story, 400-foot apartment tower at 135 Broadway joining a pair of proposed office-lab buildings.

The tower would be the city’s tallest building and replaces plans for a pair of residential buildings on the narrow 1.7-acre site between Broadway and Binney streets.

The 412,000-square-foot apartment tower would set aside up to 85 affordable units and 25 middle-income units, according to application materials submitted to the city of Cambridge by Boston Properties.

Plans to redevelop the Blue Garage site have been substantially updated amid the city’s efforts to find an alternate location for an Eversource substation improving the reliability of the city’s electrical grid, following community opposition to a previously proposed site on Wilkerson Street.

Originally, the six-story Blue Garage would have been demolished to make way for two residential towers totaling 425 units. After Boston Properties agreed to set aside a portion of the site for the substation, it gained approval for a pair of additional office-lab towers on the site, while replacing the two residential towers with a single structure.

Boston Properties recently selected architects Pickard Chilton of New Haven, Connecticut to design the two office-lab buildings on the property.

Cambridge’s tallest existing building is the 315-foot-tall SoMa Building 4 on Main Street developed by Massachusetts Institute of Technology. MIT last fall proposed a 382-foot-tall residential tower as part of its $1.2 billion redevelopment of the former Volpe Center property in Kendall Square.