St. Jerome's School was opened in 1943, staffed by the Sisters of Notre Dame de Namur, who had been teaching Sunday school in the parish since 1914. Classes were held at first in the parish hall (the old church). Construction of a permanent school began after the parish purchased the Wheatley residence on the west side of 43rd Avenue, and the new school building was completed in 1947. The convent, just to the north of the school, was built in 1951. The present church and rectory complex came next; it was begun in 1955, and completed in 1957. The parish plant was completed with additions to the school in 1960.
In 1985, the lower floors of the convent were converted into St. Jerome's Child Center, which offers day care services for infants and toddlers.