Word has it Apple and Google parent Alphabet are interested in scooping up some new Silicon Valley real estate.

Citing a top landlord in the area, The Wall Street Journal on Thursday reported that the tech giants — along with some well-established car makers — are eyeing the San Francisco Bay Area for new autonomous vehicle research and development facilities.

"We're seeing the Toyotas of the world, the Teslas of the world, BMWs, Mercedes. Ford now is out in the marketplace looking for space," Victor Coleman, chief executive of Hudson Pacific Properties, said on a quarterly investor call. "I haven't even mentioned the 400,000 square feet that Google's looking to take down and the 800,000 square feet that Apple's looking to take down for their autonomous cars as well."

That's a lot of space, but the square-footage pales in comparison to typical car factories. According to the Journal, Tesla's car-making plant in Fremont, Calif., for instance, is about 5.3 million square feet.

Apple did not immediately respond to a request for comment. Google declined to comment about the report.

Rumors about an Apple car have been making the rounds for some time, but Cupertino has yet to confirm anything. Last summer, though, The Guardian said Apple was looking into testing its car, codenamed Project Titan, at the GoMentum Station near San Francisco, which used to be the Concord Naval Weapon Station. It's also where Honda is testing its self-driving prototype.

Last year, meanwhile, Ford became the first carmaker to test autonomous vehicles at the University of Michigan's simulated urban environment, Mcity.

Google has been a little less secretive, taking its self-driving vehicles out on public roads. But the Journal last week reported that Alphabet subsidiary Sidewalk Labs is interested in city building. It's reportedly putting the finishing touches on a proposal it will present to Alphabet to build new, smarter houses, offices, and retail spaces within existing cities. The goal, according to the report, is to "create proving grounds for cities of the future," which would feature amenities like self-driving cars along with "more efficient" electric and water delivery systems.