North Hills, known previously as Sepulveda, is a neighborhood in the San Fernando Valley region of Los Angeles, California. North Hills was originally part of an agricultural community known as Mission Acres. After WWII, the newly developed suburban community was renamed Sepulveda, after the prominent Sepúlveda family of California. In 199…North Hills, known previously as Sepulveda, is a neighborhood in the San Fernando Valley region of Los Angeles, California. North Hills was originally part of an agricultural community known as Mission Acres. After WWII, the newly developed suburban community was renamed Sepulveda, after the prominent Sepúlveda family of California. In 1991, it was renamed North Hills.