Lauder Beautification Society chairman Ralph Milne said the project let rail trail travellers see the area's history.
The group raised about $120,000 through grants and community fundraisers for the move and for restoration.
Broken timber will be replaced, the building repainted, and it will be filled with memorabilia about the area for visitors to view.
Society member Earl Harrex said carpenters would start work soon and work for a Christmas restoration date.
The project was discussed about six years ago, but there was "a lot of bureaucracy" to traverse, he said. In 2013, current owners of the land the station was on, Bruce and Esme Macdonald, gave the building back to the community.
Mrs Macdonald said for the past 30 years it was "just sitting there, waiting for a purpose".
It was "now or never" to restore the building before it further decayed, she said.
"If I was put out in the rain and the snow for 30 years I probably wouldn't be looking too great either," she said.
Lauder resident Keith Naylor remembered visiting the building on his way home from school in the 1940s.
"I used to ride up to the back window on horseback and a man would hand me the mail."
The 13m x 4m building weighed about 11 tonnes.
Project manager Dean Booth said his team underestimated the weight of the building so had to move the crane closer to carry it.
"A job like this takes a lot of planning."
