Convertible Three-Bedroom.Enjoy this spacious and bright, classic five-room apartment with its current floor plan, or convert it to a three-bedroom. The flexible design offers many possibilities. Set in an elegant full-service cooperative designed by famed early 20th Century architects Schwartz and Gross, the rarely available B line is prized for both its gracious layout and all open exposures.The apartment has great light from North, East and West exposures, with a view of the river. This distinctive home features wonderful prewar details throughout, including high ceilings, moldings and patterned hardwood floors, with ample closet space.A large gallery was opened to the formal dining room and the spacious living room, which can easily be reconfigured to add a third bedroom. A separate hallway leads to the two bedrooms and two baths, one of which is ensuite. The kitchen originally had an adjacent half-bath, which has been converted to a storage area, but could also be used to install a washer/dryer.890 West End Avenue is a well-run cooperative with 24-hour doormen, live-in super, laundry, playroom, storage and bike rooms. Eighty percent financing is permitted. In this vibrant Upper West Side neighborhood, you will be surrounded by excellent shopping, restaurants, and entertainment. Local and express subway and bus transportation, and Central and Riverside Parks are all within a few blocks.