South Sydney intend to turn soil in the new year on the $20 million development they believe will make them a powerhouse for generations, regardless of whether they can secure state and federal government backing.

The Rabbitohs' grand vision to relocate their training, administration and community facilities to a new purpose-built headquarters at Maroubra's Heffron Park has appeared to be dependent on Macquarie Street and Canberra tipping in the remaining $10 million needed to fund construction costs.

Big plans: South Sydney chief executive Shane Richardson. Credit:Getty Images

Souths remain hopeful of government backing but as they approach a historic grand final on Sunday, they are desperate not to waste any time in their attempt to go to the next level as an organisation. They plan to begin work in the new year at Heffron Park even if the politicians have not signed off on grants by then.

"It's my No.1 goal, on top of winning the premiership, to get Heffron built for the future of South Sydney," Souths chief executive Shane Richardson said.