By Train: Take the A train to 181st Street. Follow the signs for the exit for 184th Street and Overlook Terrace toward the front of the platform (do not take the elevator). Make a left upon exiting the station. The building is across the street on the northeast corner of 187th and Overlook Terrace, with the main entrance on 187th Street. Using the telephone entry system, buzz 0034#.
You can also take the 1 train - get out at 181st Street. You should be on Saint Nicholas. Walk west to Broadway (the next block should be Wadsworth then Broadway -- if you see Audobon or Amsterdam you went the wrong way). When you get to Broadway, make a right and walk to 187 (you'll pass Staples and a couple of gas stations). Then make a left on 187th St. (Key Food) and it's 2 blocks over - it's the last building before you can't go anymore, on the north side of the street.
By Bus: Take the M98 or M4 to Fort Washington Avenue and 187th Street (in front of Chase Bank and Ozzie's). Walk down the several flights of stairs. The building is across the street, on the corner of 187th Street and Overlook Terrace.