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San Francisco Office Tower Closes Four Lease Signings

1/02/25

There have been four new leases to report at 221 Main Street, a Class A office tower in the heart of San Francisco’s South Financial District owned by Columbia Property Trust, Inc. The largest of the deals was with Proof School, which relocated into a 34.5k sf space at the high-rise.

Photo: Jeff Peters, Vantage Point Photography
Photo: Jeff Peters, Vantage Point Photography
Proof School, which is currently located at 973 Mission St, signed a 15-year lease across the first and second floors of 221 Main. Founded in 2015 to offer a transformative liberal arts education to students in grades 6-12 with a passion for mathematics, the school will have its own dedicated entrance and occupy a footprint that is more than double its current 16.5k sf location.

In addition, the National Venture Capital Association (NVCA) signed an eight-year lease for 3.7k sf on the fifth floor. NVCA will relocate from its current San Francisco offices at 214 Grant Avenue in January. Columbia has also secured two additional new leases totaling approximately 10.7k sf – both relocations within the San Francisco market.

This lease activity comes as the property nears completion on an expanded amenity program. Combined with the tower’s expansive private rooftop, which features unparalleled views that make it among the best in San Francisco, tenants will soon have access to some of the most exclusive offerings in the market.

Other notable tenants at the 389.2k sf tower, which was built in 1974, include software company DocuSign and financial services firm Prosper Marketplace.

With a prime South of Market location, 221 Main is surrounded by top restaurants, diverse retailers, entertainment venues and other neighborhood amenities. The tower has direct access to seven regional public transportation options, including BART, light rail, Caltrain, the ferry system and Muni, as well as the freeway.

Columbia is set to debut a sleek clubhouse lounge at 221 Main later this month. The lounge, which will be available to all office tenants in the building, will feature indoor and outdoor workspaces, a variety of seating options and break areas, ping pong, pool and other game tables. Columbia is also introducing a state-of-the-art fitness center with cutting-edge equipment, along with a bouldering wall, yoga studio and operable glass doors for an indoor/outdoor workout experience.

In addition to these amenity enhancements, 221 Main’s tenants benefit from an executive conference center, secure bike parking, and underground car parking. The LEED Platinum-certified property also features large, open floor plates and continuous window lines allowing exceptional natural light and sweeping views of the Bay, as well as a signature LED entrance display and a recently reimagined lobby.

Columbia was represented on all transactions in-house by Ted Koltis, Columbia’s Executive Vice President and Head of Real Estate, and Scott Mullen, Vice President, Real Estate, along with a JLL team of Wesley Powell, Steven A. Anderson and Lexi Castellino. Newmark’s Christina Clark and Aaron Gillespie represented Proof School. CBRE’s Blake Walker and Caroline O’Loughlin Livermore represented NVCA.




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