Hi Angie! I don't think anyone can answer your question better than you can. I have two doods. George could very well be given the run of the house by about 6 months, but Grace needs a lot more supervision than that. They are both smart and well behaved but Grace still has a pretty urgent need to chew. Even with lots of kongs and stuff to chew on, she still will go after an electrical cord or something on the kitchen counter. She is maturing in this regard, but more slowly than George, so for the moment, she is still totally supervised (10 mo.) or else in her crate or outside.
If you let your dood in the house while you're close by, start leaving the room for short periods and see how he does. Then give him more and more time alone, until you're sure he can handle it. If he's not ready, just wait a while and try again later. The time will come! (And then you'll miss the mischievous puppy stage!)