Developers are breaking ground in downtown Dallas on a high-rise residential building.

The apartment project at 2400 Bryan St. will include a combination of affordable and market-priced rental units.

Dallas developer Matthews Southwest is building the project called The Galbraith next door to the historic Dallas High School building on the eastern edge of downtown.

The 15-story building designed by architect Perkins & Will will have 217 apartments and face DART’s light-rail line.

Matthews Southwest has been working on the Bryan Street tower project for more than two years.

The developer completed a $50 million restoration of the 1907 high school at Pearl and Bryan streets in 2018.

More than a dozen high-rise residential buildings are in the works for the Dallas area, but the planned 2400 Bryan project would be the largest block of new affordable housing in the central business district.

Matthews Southwest built a 164-unit workforce housing project in 2014 in the Cedars neighborhood south of downtown. The developer also built a 336-unit affordable apartment community near Interstate 45 in Hutchins.

Matthews Southwest is one of the most successful developers in the Dallas downtown area. The firm built the 1,000-room Omni Dallas convention hotel, which opened in 2011.