Norwalk Hospital is scheduled to begin a $220 million expansion within the next year, with particular focus on services to mothers and newborns. Construction will begin with the demolition of two existing pavilions on the hospital’s grounds, which will take place in the next 12 months, Norwalk Hospital President Peter Cordeau said. The project, which has an estimated cost of about $220 million, will be funded by local philanthropies and the hospital’s own budget, Cordeau said. While plans for the new, seven-story tower have yet to be finalized, the departments expected to be included and updated in the building are the medical-surgical unit, mother and infant unit, main pavilion, labor and delivery and intensive care/progressive care, according to the statement. The project has been in the works for at least four years, Cordeau said, with the hospital board deciding whether to renovate the existing buildings or start anew.