'Spaceship' campus can't come soon enough for Apple, with firm looking to flood Sunnyvale offices instead

According to city documents and property sources, Apple could move nearly 1,500 workers to a newly-acquired campus in Sunnyvale.

The 290,000 square foot complex, known as Sunnyvale Crossing, was purchased by Lane Partners to be renovated into a state-of-the-art office campus.

Read more: Apple 'spaceship' campus gets green light

This latest development comes during construction of a 2.8 million square foot campus in Cupertino that could be used to accommodate 14,200 Apple workers.

Tim Bajarin, a principal analyst with Creative Strategies, thinks that the expansion is "more than justified," after the company earned $37.71 billion (£22.4 billion) on $176 billion (£104 billion) of revenue over the last 12 months.

"Apple continues to grow," added Bajarin. "They are building e-commerce, support staff; they are adding new software and hardware products; they are hiring all sorts of high-level engineers."

City records currently list Apple as the tenant in one of the 69,000 square-foot buildings but sources say that the tech giant is planning to occupy the other six buildings too.

Read more: Apple offers up exclusive sneak peek of new 'spaceship' campus ahead of key vote

Mountain View-based Google has also followed suit by expanding into surrounding cities, such as Sunnyvale after running out of room near its existing headquarters.

Jennifer Garnett, a spokeswoman for the city of Sunnyvale has welcomed the development, saying, "If there is a word to describe Sunnyvale and Silicon Valley, it is evolution."