The Australian Heritage Commission describe it as "... perhaps the grandest house remaining in Sydney".
Under the guidance and administration of the Middlesex County Cultural and Heritage Commission.
Mrs. Miller, of the county's Cultural and Heritage Commission, said the current economic recession and the slowdown in construction might be a good thing.
A 16-member Heritage Commission was set up on May 2012 to maintain these structures.
The Mercer County Cultural and Heritage Commission said no.
The listing was initially compiled between 1976 and 2003 by the Australian Heritage Commission.
Governor Jerry Brown appointed her to the California Native American Heritage Commission in 1982.
He was for many years a Commissioner of the Australian Heritage Commission.
A tripartite project with the Australian Heritage Commission was launched in October 1997.
The building has been heritage-listed by both the National Trust and the Australian Heritage Commission.