Whenever I hear that someone wants to turn the basement into a bedroom(s), I cringe.
Please tell me that there is not going to be a furnace or boiler in the same room as your child. The make up air for these units can not come from a bedroom.
Also, you need to make sure that there is a smoke detector and carbon monoxide detector in the bed room.
Finaly, you need to make sure there is a proper egress (escape) to the outside world from this bedroom. You will need to have at least 5.7 sq. feet of clear opening to meet this code.
Please consult with your local Building Official to ensure the safety of your child.
You may have to pay a SMALL fee for a permit but, with the proper inspections, you and your son, will sleep alot better,
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