Southampton Hospital has asked the Suffolk County Economic Development Corp. for a $14 million tax-exempt bond to help pay for its planned $23.2 million cancer center.

In a letter to the EDC board, Christopher Schultheis, the hospital’s chief financial officer, wrote that the cancer center would “greatly reduce the travel time for cancer patients to receive lifesaving cancer treatments.”

Schultheis added that Southampton Hospital planned to hire 20 to 25 additional employees for the cancer center and that it would generate $3.2 million in additional revenue in its first year of operation.

Construction on the two-floor, 14,500-square-foot cancer center is expected to begin in either the late fall or early spring, according to the hospital’s EDC presentation. Construction will take about 18 months to complete, and the facility will open a month or two after construction ends.

A public hearing will be scheduled in the next 30 days, said Regina Zara, director of business development and marketing for the Suffolk County Department of Economic Development and Planning.

“After the hearing, it goes before the EDC board for final authorization,” Zara said.

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Southampton Hospital, an affiliate of Stony Brook Medicine, is also pitching an emergency and urgent care facility closer to East Hampton for that town’s residents.

Hospital president and CEO Robert Chaloner presented East Hampton Town Board members with the idea earlier this month.

Chaloner said the satellite facility would cost $35 million to $45 million to build.