Nassau County will sell five acres near the Nassau Coliseum to build Memorial Sloan Kettering Cancer Center's outpatient treatment and research facility.
Nassau County Executive Ed Mangano said Tuesday the 105,000 square-foot facility would be built in the Long Island coliseum's parking lot.
More than $140 million in private funds will be used to build the center that provides chemotherapy, radiation therapy and other cancer treatments for patients.
Mangano says the new facility will bring 250 new jobs.
The proposal comes as developers begin renovating the Nassau Coliseum and building a retail complex.
A Sloan Kettering spokeswoman has said its Rockville Centre cancer center will be absorbed into the new facility.
The proposal still needs to be approved by the Nassau County Legislature.
If approved, the new facility would open by 2018.