With 710 Riverside, Tahl Propp Equities, one of Harlem’s largest landlords and developers, is expanding its footprint. The pre-war condominium, at West 148th Street, offers views of the Hudson River and sits adjacent to Riverside Park. The six-story building is home to 36 one-, two- and three-bedroom units. However, only 18 are for sale and the remainder are rentals. On the market are six units, ranging from a $425,940 one-bedroom to a $956,275 three-bedroom. Five apartments were in contract in early July. Kitchens feature white thermafoil cabinets and Celador countertops; bathrooms have Carrera marble tiles and Kohler soaking tubs. The building has a children’s playroom, a gym, and private storage areas. Contact www.710riverside.com or 917-407-4248.