From traveling south on Rt. 51 in the South Hills (Baldwin/Whitehall area), turn right onto Brownsville Road (conversely, turn left if traveling north on Rt. 51). At the first stop light, continue to go straight...Brownsville will turn into Baptist Road. At the next stop light, continue to go straight on Baptist, passing Caste Village and Giant Eagle on your right. Turn right on Windvale. At the top of Windvale, it runs right into the Church/School parking lot.
Traffic through the the Church/School parking lot is one way. The entrance is at the top of Windvale and travels behind the school and the Church and exits behind the Rectory.