State laws on this will vary somewhat as to the amount of time that you can go back on a problem like this.
But there are also some other problems with trying to do this.
Codes change from time to time so it might have been to code at the time. Also, depending on where and what part of the house it is, it might be hard to show that this is work that they did and is not even older work.
Moderated by rmurray223 
