Nicastro Piscopo, APLC | Louis M. Piscopo
How did you become a Legal Permanent Resident? If through a petition that allows derivative beneficiaries your son may be eligible to immigrant now. If not, they you have to file an I-130 petition for him. It will take about 4 years. You can speed it up becoming a US Citizen and they upgrading his petition.
Answer Applies to: California