Donnybrook and Woodstock are the latest hamlets to officially become part of metropolitan Melbourne.

The city’s urban sprawl continues to swallow up postcodes that once belonged to rural communities on the outer fringes, as the government announces plans for more town centres and residential developments to the north and west.

The government has also announced it will build a new train station at Toolern, between Rockbank and Melton, to service the outer west. It is expected to open in late 2019.

On Saturday, planning minister Richard Wynne will unveil the city’s newest suburbs: Woodstock, 35 kilometres north of the city, and Donnybrook, north of Craigieburn.

The two localities had a combined population of about 300 people at the last census. By 2050, the suburbs will be home to 46,000 people and 10 schools, six of which will be government schools.

Donnybrook and Woodstock are just two of 17 new suburbs planned in sites across outer Melbourne. The Andrews government has promised to rezone 100,000 lots of lands in the city’s growth corridors by the end of 2018.

The state government has partnered with the federal government to fund a $20 million upgrade of Donnybrook and Wallan train stations. Woodstock residents will have to travel to nearby suburbs to access the train lines, but the government said there were plans for another station at Lockerbie.

The developers who make huge windfalls out of new suburbs must contribute millions of dollars into a fund the government uses to pay for land acquisition and the construction of schools and other facilities. Mirvac, the developer behind Donnybrook and Woodstock, will pay $115 million.

Despite being 50 kilometres from the heart of Melbourne, the distance between the hustle and bustle of the city and Wallan, once a sleepy country town, is shrinking. Signs for house and land packages dot the Hume Highway, with more developments slated for Beveridge.

Ros Spence, the local member for Yuroke, said: “We’ve struck a deal that ensures they pay their fair share for schools, parks and services that communities deserve.”

Mirvac said construction on housing estates would begin next year and the first wave of new residents should move in by mid-2019.