Google announced a deal with NASA that lets the Internet giant expand its office space by about 50% in a lease that will cost over $146 million over the next 40 years.   Under the agreement, NASA will allow Google to build a 42-ac

re complex on the grounds of its Ames Research Center at Moffett Field, a former naval base in Mountain View, CA.   Google will lease the land from the space agency for $3.7 million annually, with an initial period of 40 years and periodic escalations in rent. After 40 years, options to renew the lease would come every 10 years, with a total term of up to 90 years.   The unused land gives Google room to build 1.2 million square feet of office and research facilities, including a fitness center, child care, dining, and conference buildings.   Plans also include a housing complex for Google employees.   The massive Google complex is slated to begin construction in September 2013, with incremental additions in 2018 and 2022 and a total employee capacity of 5,000.   The new complex will be adjacent to the current Googleplex in Mountain View that employs 8,000 workers. It ensures that the rapidly expanding Internet company has ample room to grow.   “This long-term lease agreement is a key component of Google’s stragegy for continued growth in Silicon Valley,” said David Radcliffe, Google's vice president of real estate and workplace services, in a written statement.   The lease agreement is part of a series of coordinated efforts between Google and NASA that include space, mapping, and disaster response.   Last year, NASA was criticized for agreeing to allow Google executives to land their Boeing 747 and two smaller planes on the airstrip on the same land for $1.3 million a year.   By Danny Scuderi   FEEDBACK For comments on this article, email us at