This is very impressive, but even geniuses need boundaries. The most advanced scientists or inventors or engineers still have to follow procedures and respect their working environments and colleagues.
I would sit down with him and let him know you love his curiosity and his abilities, but things that are attached to the house (doorknobs, doors, etc) are off limits unless it's a repair being done with someone who's responsible for the house (who pays the rent or mortgage).
I would tell him that in the middle of the night, or between the hours of 9 pm and 7 am (or whatever time suits you - and make sure he has a clock that he can refer to), he is not allowed to take furniture apart.
But, to satisfy his curiosity at those hours, get him a plastic bin or tub. Fill it with non-working computer parts, old clocks, parts and pieces, safe tools, Lego Technic and Erector sets, etc. Tell him that during the night if he needs to build/take apart/learn he can use the stuff that's in that plastic tub, quietly, in his room. Find cool stuff at thrift stores that he can safely take apart.
Perhaps you can talk to a school industrial arts teacher, or a fine carpenter or builder. Ask him or her to speak to your child about the dangers of using tools, and the importance of not using tools when you don't have someone aware of what you're using or doing. I am not a builder, but I don't think a responsible engineer or builder would take a power tool to the top of a roof without some sort of person or safety supervisor or colleague aware of the potential risks. Have your son be accountable for safety. Teach him that safety and responsibility and accountability and following procedures are just as important as creativity, intelligence and ingenuity.
Good luck!