First, I can tell you, that the state of California has no age limitations or requirements as far as leaving children alone.Shocked? So was I.I contacted child protective services and the local police department,because I was concerned about a couple neighbor kids,that were home alone,several nights a week. The young girl, would come over crying,late telling us that she was hearing noises and afraid. I would sit with her sometimes,till her mother returned. She was usually intoxicated. She never once thanked me for caring for her frightened daughter.Matter of fact she was angry,and often yelled at her child for asking for help. She would leave them till 12 sometimes 1am. The kids were only about 8 and 6. I was told, that there was no age limit, and that as long as children weren't abandoned for days at a time, there was nothing they could do about it.So much for child protective services.I will get off my soap box here, and answer your request. You didn't mention your sons age, but I'm guessing since you said he was going to be a teenager. That hes twelve going on 13. You know DA. The question I would ask myself, is...If there were a real emergency, or someone was attempting to break in,would I be able to handle it by myself? If you don't think you could, then it wouldn't be to terribly fair,to expect your teenage son to.Like you, I put my life on hold in order to raise my sons. God knows You deserve to get out a little and enjoy the comradery of good friends,and possibly a little romance. If you have an alarm system,or a very good neighbor, that would be there for him,in case of emergencies,That would make you and him feel alot safer.I like the response from the mother that suggested starting out with just a couple hours away,and see how he does.Then,adding an hour or two. I wish you and your son the very best DA.J.