by Tim Fang

SUNNYVALE (CBS SF) – It appears that Apple is not done with expanding the amount of office space it has in Silicon Valley. The Cupertino-based maker of iPhones is reportedly looking to occupy a proposed 777,000 square foot office complex in Sunnyvale.

Sources told the Silicon Valley Business Journal that Apple has reportedly reached a deal with Landbank Investment LLC to lease the space, which would be located at Central Expressway and Wolfe Road. The project is being called “Not Another Box” by its developers for its unique look.

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According to a brochure from the developer (.pdf), the complex would consist of three six-story buildings on 17.84 acres of land. The developers said the project would be LEED Platinum and have a 90,000 square foot rooftop garden among its amenities. The project also has the option to add an additional 208,000 square feet of rooftop garden space.

It is unclear when the project would begin construction.

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The lease comes as Apple nears completion of its so-called “Spaceship” campus located about four miles south of the Sunnyvale project, near Wolfe Road and Interstate 280 in Cupertino. Once complete, the 2.8 million square foot office building is expected to house 14,000 employees.

The new Cupertino campus is expected to be finished in 2016.

In August, Apple bought a 43 acre site in North San Jose. The San Jose site has the potential to hold 3 million square feet of office space and accommodate about 15,000 workers.

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Tim Fang is a digital producer for CBS San Francisco. A native of the Bay Area, follow him on Twitter@fangtj.