We can reveal move-in time for the first residents of Box Hill North will be 2017, with the first land release touted to be in the second half of 2015.
The master-planned estate will have a projected total value of $4 billion and be home to 4000 new families when completed.
"We are still determining the lot sizes and prices," Matthew Scard, the development director for property developer EJC, said.
The estate will have about 4100 dwellings, a mixed-use town centre, primary school, sporting fields, nestled around 80 hectares of nature and parkland reserves.
Newly-elected Castle Hill MP Ray Williams described it "as one of the most visionary new suburbs ever created in this country".
"Where else in western Sydney can you buy water-front property," he said with reference to a four-hectare made-made lake to be constructed by EJC north of the town centre.
Mr Scard said the lake would be "created in alignment with the Box Hill North sustainability and water management strategy".
"This is subject to council, and other authority, approvals," he said.
He said early works would begin in late 2015, including proposed future intersections on Old Pitt Town Road, bulk earthworks, and Stage 1 subdivision works.
Mr Williams said the new suburb would create jobs close to home, with more than 10,000 square metres for local shops and commercial businesses, together with a new town centre.
The Hills councillor Peter Gangemi said the development was unique as it was initiated by a development consortium and 31 landowners in the area — not by the NSW government.
Mr Williams said the private development would be completely self- funded and also contribute an additional $16 million towards future upgrades of busy Windsor Road.
According to an assessment by GTA Consultants, regional road network improvements have been included as part of State Infrastructure Contribution levies for Box Hill, to be implemented by 2036.
Funded works involve improvements at key intersections along Windsor Road, including Boundary Road, which would be converted to a four-way intersection with realignment of Loftus.
Funding would also be available to upgrade the vertical road alignment along Boundary Road, between Windsor Road and Old Pitt Town Road.
The Box Hill North indicative layout plan indicates vehicle access to the Box Hill North will be from Boundary Road to the west and Old Pitt Town Road to the south.
"All regional upgrades are funded through the Voluntary Planning Agreement between the developer and the Minister for Planning," Mr Scard said.
He said funds are generated on a lot-by-lot basis, with the timing of the proposed upgrades to be at the discretion of the Department of Planning.
READ MORE: ... and in Box number two [we reveal the latest details about what's happening at Box Hill]