Fifty thousand housing lots will be released by the Andrews government in Melbourne’s sprawling growth corridors, paving the way for 12 new suburbs.

Work will begin on turning the large swathes of land into new suburbs within the next four years, Treasurer Tim Pallas will tell the Urban Development Institute of Australia on Friday.

But almost all of the new suburbs lie beyond the reach of Melbourne’s urban rail network.

Twelve parcels of land will be released to make way for thousands more houses. Credit:Paul Rovere

Six of the 12 parcels of land to be released - in Beveridge North West, Wallan South, Wallan East, Merrifield North, Lindum Vale and Shenstone Park - are currently serviced by the Seymour Line. V/Line trains run hourly in the day and roughly every half-hour in the peak.