Pelli Clark Pelli with HKS Architects has made design revisions to their Transbay Parcel F proposal, the final building expected to rise within the transformative Transbay District in San Francisco. The 64-storey tower at 550 Howard Street now features a gentler overall expression, swapping hard right angles and asymmetry for a softer and more elegant sculptural identity.

Revised rendering of the tower, image via Pelli Clarke Pelli Architects

Developed by a joint venture called F4 Transbay Partners — consisting of Hines, Broad Street Principal Investments, and Urban Pacific Development — the project would entertain a healthy mix of uses. Its 200 residences would be scattered among the upper 27 floors of the tower, while the remaining bulk hosts 16 levels of office space and a 250-room hotel. The residential and office lobbies, marked by a smooth glass exterior, would face Howard Street.

Revised rendering of the tower, image via Pelli Clarke Pelli Architects

Natoma Street, which has largely been cannibalized by the development site and the adjacent Transbay Transit Center, will be converted into a pedestrian mews lined on either side by retail. Renderings for this space show people strolling by patio furniture underneath a webbing of lights and a pedestrian bridge connecting the tower's fifth floor to the rooftop park on the new transit hub.

The proposed pedestrian mall at the base of the tower, image via Pelli Clarke Pelli Architects

Upon completion, the tower would be the fourth tallest in San Francisco, sitting comfortably behind the Salesforce Tower, Oceanwide Center, and the iconic Transamerica Pyramid. 

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