179 Sidney Street revisits the renovation of a modest Cambridgeport warehouse by architects Rodolfo Machado and Jorge Silvetti, their first realized project in the United States. The film moves between archival material from the Machado Silvetti Collection at Harvard GSD and contemporary footage of the building today, aligning past photographs with present day views of the same spaces. Fragments from Jorge Silvetti’s lecture recordings are interwoven with a present day conversation with Donald Grossman, the building’s owner, who still lives on the top floor. Silvetti reflects on architectural invention as the transformation of familiar forms, while Grossman recalls the building’s early renovation, its custom details, and the decades of everyday life that have unfolded within it. Rather than presenting the project as a fixed historical object, the film treats the building as an ongoing accumulation of intentions, memories, and adaptations. Archival images dissolve into present conditions, revealing small shifts, continuities, and misalignments across time. Through this oscillation between documentation and lived experience, 179 Sidney Street becomes a quiet portrait of how architecture persists, changes, and gathers meaning long after construction is complete.