City school officials plan to merge Skane School with the nearby John Winthrop School as part of a multi-million dollar effort that will also include renovations to the aging Winthrop building. The construction project, which could begin as soon as 2025, is expected to cost around $80 million, according to city finance officials. The City Council has agreed to spend $17.8 million on the effort while the state will shoulder the rest of the burden. The merger is one of two ongoing efforts to house multiple schools under one roof. In May, the city broke ground on the new Bassick High School, a $129 million facility near Seaside Park that will also be the home to the Bridgeport Military Academy when it opens in the fall of 2025.