Nearly three years after Lewisboro Elementary School was shuttered due to falling enrollment across younger grade levels, the Katonah-Lewisboro School District announced that it has reached a deal for the town of Lewisboro to lease roughly 20 percent of the building. The district announced that the proposed lease, which would take effect on April 1 of this year, is subject to a vote of approval by the school board at a meeting on Saturday, while the Lewisboro Town Board is set to ratify the agreement on Monday.