PART of The Hills Council's operations centre will be relocated to the fringe of the Castle Hill Showground.
The current depot site will become a construction zone for the North West Rail Link early next year, with the council dividing its depot facilities to make up for the loss.
The depot's heavy plant and equipment will relocate to a newly-constructed 7531 square metre site behind the current council chambers on the eastern fringe of the showground.
Administrative and operations staff will relocate to the current council chambers while workshop staff will move to Winston Hills.
The council's chambers will relocate to Norwest Business Park at the end of next year.
The Hills Council's general manager Dave Walker said the move sent a strong signal that the rail link was coming.
"Earlier this year Premier O'Farrell announced the Castle Hill Showground will be preserved as a community leisure precinct," Mr Walker said.
"We will understand more about how this will happen when Environmental Impact Statement two is released."
As part of the move the council will create new access to the showground with entry at the Middleton Avenue and Carrington Road intersection, through the car park and along the eastern side of the main arena.
The council will also provide 34 car spaces to offset the loss of The Hills Centre car park.
The site which will house the heavy equipment has sometimes been used to hold horses during showground events.
President of the Show Society, Peter Gooch, said they were eagerly awaiting the North West Rail Link's second environmental impact statement which would indicate the exact impact of operations on the showground.