SAN JOSE — Santana Row’s owner, which already is actively planning two big new office buildings that would rise across from the iconic mixed-use development in San Jose, is also considering a third office building that could eventually be part of a million-square-foot campus roomy enough to accommodate thousands of workers.

The two buildings already in the planning stages by Federal Realty, the developer and principal owner of Santana Row, would be located near the corner of South Winchester Boulevard and Olsen Drive, just west of Santana Row.

The newly proposed Santana West complex would consist of three buildings totaling 1 million square feet. Two would contain 350,000 square feet each, and the third would offer 300,000 square feet of office space, according to a leasing brochure being circulated by the San Jose office of Newmark Knight Frank, a commercial real estate firm. The construction will preserve a landmark domed movie theater that for decades has been a familiar sight on Winchester Boulevard.

Newmark Knight Frank brokers Todd Shaffer, Tracey Solari and Randy Gabrielson have begun to scout for tenants to lease the offices.

“Next step should be the first of two 350,000-square-foot office buildings at Santana West,” Federal Realty’s Chief Executive Officer Don Wood said during a Feb. 14 conference call to discuss 2018 earnings. “We expect the investment committee consideration of that project in a couple of months with construction start later this year if we get comfortable with the numbers.”

This sort of expansion makes sense to Silicon Valley commercial realty experts, especially at Santana Row.

“They have the right mix of retail, restaurants, residential, amenities and the location at Santana Row to support new office development,” said Steve Horton, a vice chairman with Cushman & Wakefield, a commercial real estate firm.

Prospective office tenants for the Santana West complex, where 5,000 could potentially work, would likely find the nearby Santana Row a compelling draw, experts said.

“Santana Row is a place, it’s a destination, it has an identity,” said Dave Sandlin, an executive vice president with Colliers International, a commercial real estate firm. “Tech companies want cool buildings, cool locations like this to make it easier to attract good employees.”

Federal Realty has been on a hot streak lately with office leasing at Santana Row.

In 2018, the developer signed a lease with Splunk, an up-and-coming tech company that agreed to rent 301,000 square feet at an under-construction office building known as 700 Santana Row. In 2015, Splunk leased 235,000 square feet in the 500 Santana Row office building a short stroll away.

“The Splunk expansion shows this is a highly desirable area,” said Bob Staedler, principal executive with San Jose-based Silicon Valley Synergy, a land use and planning consultancy.

The 700 Santana Row office complex, a striking building that curves in the front, is expected to be ready for Splunk to occupy before the end of this year.

“It’s great to see Federal Realty keep the momentum going on creating a really dynamic environment” at Santana Row, Staedler said.