Chicago’s Department of Planning and Development is launching a $75 million program to build “missing middle housing” in neighborhoods on the South and West sides in an effort to provide lower-cost, owner-occupied for-sale housing options and repopulate communities after a decadeslong population decline, the department announced Tuesday. The program — officially called the Missing Middle Infill Housing Initiative after originally being named “Come Home Chicago” — will start in North Lawndale with 44 vacant, city-owned lots being offered to developers to purchase for $1 each.