Shake Shack will open its first Oakland restaurant at Uptown Station, said three people with knowledge of plans for the development.

The New York burger chain plans to occupy part of the ground retail space at 1955 Broadway, said the sources, who weren’t authorized to speak publicly. The eight-story building housed a Sears until 2014 and has been undergoing renovations since.

Shake Shack has been expanding throughout the Bay Area, opening in Palo Alto in December and Larkspur in March. It is hiring employees for a San Francisco restaurant in Cow Hollow that is undergoing city review.

Shake Shack didn’t immediately have comment.

Uptown Station is one of Oakland’s most prominent buildings, spanning half a city block next to the 19th Street BART Station. The area is transforming with apartment towers and restaurants, and events like Oakland First Fridays draw tens of thousands of visitors to the area.

Separately, Uptown Station office tenant Square confirmed it is seeking subtenants for 155,000 square feet, or more than 43% of the building’s workspace. The San Francisco payments processor leased all 356,000 square feet of office space in the building in December, with plans for up to 2,000 employees.

The sublease space spans the third and fourth floors and will be available in November, according to a marketing brochure. Asking rents weren’t disclosed. Square declined to comment further.

Co-working giant WeWork is in talks to sublease a portion of Square’s listing, according to a person with knowledge of the discussions. WeWork declined to comment.

“I think it’s safe to assume Square is banking the space for future expansion. They probably assume they will be able to break even on it, or even sublet it at a profit,” said Jesse Gundersheim, CoStar’s Bay Area director of market analytics. “Having Square as a downstairs neighbor could also be exciting for start-ups who enjoy a certain energy generated within bustling buildings filled with tech workers.”

The 1929 building first housed department store H.C. Capwell, becoming a Sears in 1996. In 2015, Uber bought the building and planned a major office hub. But the ride-hailing company sold it in 2017 to developer CIM Group as it sought to cut costs. CIM didn’t respond to requests for comment.

Office rents have roughly doubled in downtown Oakland since 2015 and reached $57 per square foot annually in July, according to Cushman & Wakefield.

Other growing Oakland tenants include Credit Karma, which leased at a new tower at 1100 Broadway. Kaiser Permanente, the city’s largest private employer, plans to build a $900 million headquarters two blocks from Uptown Station.

Roland Li is a Chronicle staff writer. Email: roland.li@sfchronicle.com Twitter: @rolandlisf