As the number of students continued to grow, a larger building on Bloomfield Avenue, the Beach House, was purchased in 1888 to serve as a temporary school, convent, and infirmary. At the same time, Mother Catharine bought 31.5 acres on the opposite side of Bloomfield Avenue. In 1891, she sought permission to erect a convent, similar to the motherhouse in Regensburg, on the land. Construction commenced and the cornerstone was laid in 1893. In 1912, the Motherhouse and Novitiate were officially moved from Jersey City to Caldwell.
Mount Saint Dominic Motherhouse, Mercedes Hall, and surrounding farmland circa 1915