Near the top of the neighbor's house on an outside deck (a location that isn't necessary to reach to actually finish the game) is a hidden alcove with a locked door.
Need help with other aspects of this difficult breaking and entering simulator? Check out our guides: Below we break down what exactly is going on with these codes and what they might mean for future editions of the game.
One such secret recently puzzled out by the Hello Neighbor community was the appearance of two partial QR codes in very out-of-the-way locations that didn't seem to have any major in-game effect.