Our male Boston Terrier just turned a year old. We got him when he was 9 mos. and has been neutered. All he has to do is go out the back door to the deck, down the stairs, and has a fenced-in yard to run around in. Unless we go out with him and follow him around, even put a leash on him, he will not go to the bathroom. We reward him with treats and heap on the praise when he goes, but he refuses to go on his own. After dinner when he likes to play, I have to put a diaper on him. The harder he plays, the more likely he is to pee somewhere in the house. This is usually the only time he'll do this. But he'll do this when we decide playtime is over. I confine him to a bedroom when I go out, but he never messes in there or chews anything up. We are just about at our wits end.
You know when my landlord was renovating my bathroom, all I had to do was go out the backdoor, down 3 steps, into the back house and use their bathroom(it was temp. unoccupied). After my "accident" at 3am I resorted to a bucket to be dumped the next day. I guess it is like the old days using the outhouse...LstoryS...the dog has too far to go. Try making the potty stops regular in timing, crate the dog, and use No-Go on any spots he made in the house. The scent stimulates him to use the house to potty, so you need to destroy the residue scent.