More on Mark Zuckerberg

PALO ALTO -- Living the fantasy of every homeowner who's faced the prospect of a nuisance project next door, Facebook's Mark Zuckerberg has bought four homes adjacent to his own 5-bedroom crash pad in one of Palo Alto's toniest neighborhoods.

Zuckerberg paid top dollar -- more than $30 million in total -- for the four residential properties located next door and behind his own home. But he has no plans to build a Taj Mahal on the land, according to a person with knowledge of the transactions, who said Zuckerberg is leasing the existing homes back to the families that live there.

The 29-year-old multibillionaire acted after he learned of a developer's plan to buy one of the properties next door to the Facebook co-founder, said the source. "The developer was going to build a huge house and market the property as being next door to Mark Zuckerberg."

Zuckerberg is one of several prominent tech CEOs who own homes on Palo Alto's tree-lined streets. Yahoo's (YHOO) Marissa Mayer and Google's (