 An additional wing was added to the mansion in 1959.The passage of the 2004 Highlands Water Protection and Planning Act, which placed the property in the highly development-restricted Preservation Area, dashed hopes by the religious order to sell the property to speculative development interests and they brought suit against the State of New Jersey.The Highlands Act was upheld in court, yet this contentious action eventually yielded to the more appropriate land use that exists today in which the historic character of the former estate and the integrity of the Highlands natural resources are maintained under the current ownership and the adaptive reuse of the property.