Philadelphia developer Michael Samschick's Core Realty is seeking a buyer for its building project near the Sugarhouse Casino in Fishtown that includes at least 179 apartments and a 22,000-square-foot rock-climbing gym.

Core is asking $11 million for the project at 1100 N. Delaware Ave., according to an email Monday from Rittenhouse Realty Advisors, which is marketing the 45,746-square-foot site with zoning for the development and a lease with the climbing-gym operator already in place.

The plan being marketed calls for the six-story structure with 169 apartments and the gym to be built south of the Edward Corner Marine Merchandise Warehouse building near Delaware Avenue and Shackamaxon Street.

Core representatives said in a November presentation to the city's Civic Design Review board that they also planned to restore the Edward Corner building, which is listed on the Philadelphia Register of Historic Places, to accommodate 10 residential units and ground-floor commercial space.

They later received permission from the Philadelphia Historical Commission to add three floors to the historic structure for more apartments, the website PlanPhilly reported in April.