Facebook Inc.'s sprawling campus in Menlo Park, Calif., is so full of cushy perks that some employees may never want to go home. Soon, they'll have that option.

The social network said this week it is working with a local developer to build a $120 million, 394-unit housing community within walking distance of its offices. Called Anton Menlo, the 630,000 square-foot rental property will include everything from a sports bar to a doggy day care.

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