South Yarra Station is set for a $12 million makeover thanks to an election sweetener as Labor targets marginal Greens seat Prahran.

The entrance to the train station on Toorak Road will be widened and the layout changed to make the station larger, with work to start in mid-2019 and be competed by the end of the year.

Prahran was a key battlefield in the 2014 state election, with the Greens winning the seat by nearly 300 votes.

South Yarra Station will be enlarged if Labor wins the November election. Credit:Eddie Jim

“These works, combined with the Metro Tunnel, will mean less queues and more trains for South Yarra Station," Transport Minister Jacinta Allan said.