Google LLC is in discussions with Brookfield Properties to lease as much as 1.75 million square feet at the Brookfield Property Partners LP unit's $3.5 billion project in the Dogpatch neighborhood of San Francisco, the San Francisco Business Times reported, citing sources familiar with the talks.

The Alphabet Inc. unit is negotiating to occupy the entire office component of the Pier 70 mega project, which will include 2,150 homes and 2.27 million square feet of commercial space on 28 acres of former industrial land.

Construction on the project's first office building will begin in 2020 at the corner of 20th and Maryland Streets, with the other phases scheduled for completion by 2028.

The deal, if reached, would be the largest direct office lease in San Francisco's history, the publication noted.

Google did not respond to requests for comment, while Brookfield told the publication it does not comment on rumors.