Construction has started on the Sydney Metro Trains Facility South at Marrickville.
It will have the capacity to stable 16 driverless trains. Minor maintenance work and train cleaning will also be done at this site.
The new buildings are currently under construction, including a maintenance workshop and water treatment plant.
The Sydney Metro Trains Facility at Rouse Hill will remain the main train stabling location and site for major maintenance work.
This facility is being expanded to support the extension of metro rail from the end of the Metro North West Line at Chatswood, under the Sydney CBD and beyond to Bankstown.
The work at Rouse Hill includes more railway tracks in the maintenance facility and the stabling yard.
More than 15 kilometres of railway steel, 7000 sleepers and eight kilometres of overhead wire have been installed.
The expansion of the Rouse Hill facility is expected to finish later this year. Sydney Metro’s Line-wide contractor Systems Connect is delivering this work.