The due-diligence investigations were to have been completed early this year but are now unlikely to be finished until late June.

The iconic Golden Square mansion formerly owned by quartz king George Lansell is yet to be valued.

“Defence is undertaking due-diligence studies including heritage, environmental contamination and unexploded ordnance investigations,” a Defence spokeswoman said.

“The formal process of disposing of the site will commence once all reports are complete, received and have been fully considered.

“Some of the investigations have taken longer than originally anticipated.

“The due-diligence investigations are expected to be complete late June or early July 2009. Once complete they will need to be examined by Defence.”

Parliamentary Secretary for Defence Support Mike Kelly - who is responsible for the disposal of all Defence properties - still plans to tour Fortuna Villa, despite his plans also being delayed.

Dr Kelly is expected to visit during July, Federal Parliament’s winter recess.

“In February 2009, Dr Kelly was invited by the member for Bendigo, Mr Steve Gibbons, to visit the site,” the Defence spokeswoman said.

“Dr Kelly accepted the invitation, however due to portfolio and electorate commitments has been unable to confirm a date for his visit.

“Dr Kelly is looking forward to visiting the site.”

The Defence Department has informed major stakeholders of the delay in disposing of the property.

“Defence is in regular contact with the City of Greater Bendigo on the due-diligence process,” the spokeswoman said.

“The Victorian Government and the City of Greater Bendigo will be provided with the due-diligence reports, once complete.”