He and his family live in West Lake Hills, Texas, a wealthy suburb of Austin, Texas. McCaul is frequently named as one of the top-ten users of household water in the Austin area, and was the No. 1 consumer of household water in the city for 2017. According to The Dallas Morning News, "Several cities try to conserve water by creating mandatory watering schedules for residents. Dallas residents are allowed to water their lawns twice per week, with the day depending on the digits of their address. In Austin, residents are restricted to one or two days of watering per week and only during certain hours of the day."