This rendering shows one of 4 charitable duplexes planned to go up in Meyerland that will be set aside for single-mother families. Construction began late last week on property that’s owned St. John’s Presbyterian Church at 5020 W. Bellfort Ave., between Willowbend and S. Post Oak Blvd., just outside the Loop. One of the 8 units will also be home to an on-site caseworker.