This historic downtown Fort Worth building will soon become high-rise apartments
February 5,2026
See full Fort Worth Star-Telegram article by Samuel O'Neal here.
Construction will soon begin to turn the historic former Oncor Building in downtown Fort Worth from office space to apartments.
Hasen, a Fort Worth-based construction company, is expected to begin construction in the next 30 to 60 days, the company said.
The redevelopment of the building, at 115 West Seventh St., will convert the 300,000 square foot, 16-story tower into about 330 residential rentals, including studio, one-bedroom and two-bedroom apartments. The building will include ground floor restaurants and stores, and will add an atrium that will create light wells, a fitness center and a business, said Hasen president David Hasenzahl.
Hasen is working with Chicago-based real estate development firm 3L on the project. Construction is projected to finish in two years, the company said.
“We look forward to energizing this building to bring this iconic tower back to life while preserving its historic beauty to honor Fort Worth’s history,” Hasenzahl said. “3L is a prominent player in the adaptive reuse movement with a proven track record of transforming aging, underutilized office buildings into modern residential multifamily homes.”
All of the building’s amenities, including The Capital Grille, Little Red Wasp and PlainsCapital Bank, will remain open during and after construction.
Rent prices will be market-based. Joseph Slezak, founder of 3L Real Estate, said studios could start under $1,100 per month with one and two bedroom units starting closer to $2,000. Estimated rents could change between now and the building’s opening date.
“3L is eager to continue investing in Fort Worth with this new project,” Slezak said. “We believe in the city of Fort Worth’s downtown development efforts, and we’re committed to helping by expanding housing opportunities for residents at all budget levels.
The tower is within walking distance of the new Texas A&M-Fort Worth campus, which is expected to start enrolling students during the fall semester.
“We anticipate these units to be popular among the TCU medical school and Texas A&M Law School students and employees,” Hasenzahl said. “By converting this underutilized office building into sophisticated residential rentals, we are providing the vital residential infrastructure needed to support Fort Worth’s transformation into a premier research and medical destination.”
The tower was built in 1952 as the Fort Worth National Bank until it left in the mid-1970s. The building was then known as the Oncor Building for more than 50 years, but 3L bought the building in 2023, two years after Oncor moved its operations out of the building and into a new downtown location.
Hasen has also overseen other major reuse projects in Fort Worth, including the Historic Electric Building in downtown Fort Worth and Rodeo Plaza in the Stockyards.
Locations Mentioned: The Capital Grille, Little Red Wasp, PlainsCapital Bank, Texas A&M Fort Worth