As reports continue to swirl about a major biotech company lease in the Seaport District, WS Development plans to break ground this fall on a 626,400-square-foot office complex.

Documents submitted to the Boston Civic Design Commission show a 16-story building with a 5-story cantilevered podium, multi-pane windows and a brick and metal facade.

Designed by architect Morris Adjmi of New York with architect of record Stantec, the structure is designed to blend in with the industrial architecture of Fort Point, according to presentation materials. Two stories of retail space would face Summer Street as well as the lower levels off Congress Street.

The project is scheduled to break ground this fall with completion in mid-2022, according to the presentation. Chestnut Hill-based WS Development declined to comment on the potential tenant.

Roche subsidiary Foundation Medicine, which occupies 161,000 square feet at 150 Second St. and 10 Canal Park in Cambridge, has been scouting sites in Boston and Cambridge for up to 1 million square feet of office and lab space and recently narrowed its search to WS’ Seaport Square parcels.

Parcel P is just south of Amazon’s future 430,000-square-foot office building, and borders a planned pedestrian stairway connecting the elevated section of Summer Street with Congress Street and the Harbor Way pedestrian corridor to Seaport Boulevard.