Highland Hospital is looking to expand. A modernization plan would add four stories to the three-story southwest wing, and that would allow nearly all patients to have private rooms. Highland says private rooms help reduce the risk of infections, and offer more adequate, therapeutic space during recovery.The four new levels would add 60 rooms.The hospital will need a zoning change from the city, and will be holding meetings with neighborhood and business groups to address any potential concerns. Construction could start in spring 2020 and be finished in about two years.