Mayor Bill de Blasio’s feasibility study for a possible Sunnyside Yard “overbuild” project is complete and suggests that the project could cost anywhere from $16 to $19 billion, according to the New York City Economic Development Corporation (NYCEDC).

“In Western Queens, there remains one of New York City’s last great opportunities to solve many of these challenges in one place,” said Alicia Glen, deputy mayor for housing and economic development, calling the development a “new and innovative solution” to meet New York City’s growing housing and transportation needs.

The 180-acre rail yard, which sits in the center of Western Queens, is a major transportation center owned by Amtrak and Metropolitan Transit Authority (MTA) that services the New Jersey Transit and the Long Island Rail Road. Some entities are already proposing updates to the site—Amtrack, in particular, is planning a new High-Speed Rail facility that will open by 2030.

The feasibility study took many of these developments into account, focusing on the engineering, economic, and urban design implications of the project, and after almost two years of study, the report concludes that the project is feasible, albeit costly.

In the study, the NYCEDC establishes three case study plans with different program focuses. The first proposes almost entirely residential development, adding up to 24,000 units of housing. Of those residences, 30% would be allocated for affordable housing, part of de Blasio’s affordable housing goals outlined for New York City. The proposal would also add up to 19 schools and almost 50 acres of open space.

The second study, dubbed the “live/work/play” proposal, was designed to offer a well-rounded program with residential, cultural centers, and office space. This proposal is the only proposal to include office space and would still incorporate up to 19,000 units of mixed-income housing and up to 14 schools.

The third and final study is the “destination” proposal, which focuses on residential and cultural spaces. The proposal features almost 1.5 million square feet of mixed-use space and up to 22,000 units of housing, still allowing for retail spaces and up to 14 schools.

Each of the three proposals focuses on developing the 80 to 85 percent of the site the NYCEDC has deemed viable and connecting it to the surrounding neighborhoods using existing bridges and roads and adding significant green space to the area.

During their study, the NYCEDC selected a 70-acre portion of the site, called the “Core Yard,” as an optimal place to begin the development, with a price tag of approximately $10 billion. The area features enough space to create a complete neighborhood and is well-located to incorporate the Amtrak master plan.

In the second phase of the master plan, the NYCEDC plans to look in greater detail at how to avoid significant impact on transportation infrastructure. They also hope to create a detailed urban plan and consider sustainable initiatives and architectural standards for future buildings.

Before that phase, however, de Blasio and the NYCEDC will collect feedback from the community and work with Amtrak, who plans to begin construction on a High-Speedeed Rail facility at Sunnyside Yard in early 2018, according to QNS.

You can read the full report about the feasibility of Sunnyside Yards here.