399 Congress mixed-use tower in Seaport District starts foundation work, new rendering revealed

Preparations for foundation work are now underway at the future site of the 22-story 399 Congress mixed-use tower in the Seaport District, which will feature 414 apartment residences and approximately 12,000 square feet of ground-floor retail, innovation and lobby space. Foundation work, including excavation of the building’s three-level, 144-space underground parking garage, is scheduled to last through next April, at which point structural frame construction will begin.

399 Congress' facade will feature a mix of dark and light grey metal panels with glass curtain wall, as opposed to the originally-proposed tan finish panels; the latest 399 Congress rendering is posted above. The building will be located across from the $900 million, 1.3-million-square-foot Echelon Seaport mixed-use development, which broke ground last month, and steps from the $157 million, 325,000-square-foot Waterside Place Phase 1B mixed-use development, which is expected to start construction this year. Developer Crescent Heights acquired the 0.7-acre 399 Congress Street site for $36 million in January 2016. Crescent Heights recently closed on $157 million of construction financing for 399 Congress provided by The Union Labor Life Insurance Company.

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