I don't know about Washington, but in Oregon if it has electrical you need permits. Full stop. It's absolutely not on the buyer. It's on the buyer to do their

I don't know about Washington, but in Oregon if it has electrical you need permits. Full stop. It's absolutely not on the buyer. It's on the buyer to do their due diligence, but it is certainly unethical, if not illegal to sell this cabin without disclosing that all of the work (especially but not limited to plumbing and electrical) was done by untrained and unlicensed amateurs. It's probably illegal too, but I don't have the expertise to be sure of that. And while my libertarian leanings make me comfortable using disclosures at time of sale to put some of the liability on the buyer, I'm very much not sure that the law sees it that way.