Gps: 1290 Harbins Road, Norcross, Ga 30093. Directions: I-85 Nb To Exit 99 (Jimmy Carter Blvd) And Turn Right. Travel 3/4 Mile And Turn Left On Singleton Road, Then 1.4 Miles And Turn Right On Harbins Road. Then Go 1/4 Mile And Turn Left On Rock Terrace Drive Into The Community.