Boston’s 39-year-old Dock Square Garage would get a new facade and a 10-story addition under a proposal submitted by the new owners, New York-based Fortis Property Group.

The ground floor restaurant space currently occupied by Hard Rock Cafe would shrink from 15,000 to 8,000 square feet to make room for a new lobby for the proposed 195 housing units, Fortis said in a project filing with the Boston Planning and Development Agency. Approximately 280 of the 682 parking spaces would be redesigned for valet service with potential use of mechanical stacking systems.

Residences would range from studios to four-bedroom units. The developer would include 25 income-restricted units on-site to comply with Boston’s inclusionary development policy.

Designed by architects Stantec, the building’s shape is intended to minimize shadow on the Rose Fitzgerald Kennedy Greenway’s North End Park, developers said in a project filing. The addition would increase the structure’s height from 76 to 209 feet in a counter-clockwise direction, with the highest section facing Clinton Street on the southern side of the property.

The existing 7-story garage’s brick exterior would be replaced by a terra cotta and perforated metal facade with embedded LED light strips.

Fortis acquired the garage at 20 Clinton St.  next to Faneuil Hall Marketplace in September for $170 million from original developer Dock Square Parking Assoc. Fortis is targeting a groundbreaking in the spring of 2019 with completion in 2021 for its $120 million development.

The development would be the third major project in the immediate neighborhood as foundation work on a 46-story condominium and apartment tower continues at 100 Sudbury St. as part of HYM Investment Group’s 2.9-million-square-foot Bulfinch Crossing.

CV Properties and Harbinger Development are partnering on a 225-room hotel on a Massachusetts Department of Transportation-owned parcel at the corner of North Street and the John F. Fitzgerald Surface Road. Construction is scheduled to begin in the second quarter. That project was reduced from 10 to 6 stories after protests from North End residents and the Massachusetts Historical Commission.