Welcome to Tiny Homes, an idea that is more popular with minimalists than with neighborhood associations and zoning boards. We'll point out the fun parts. You'll have to check out the logistics and legalities - but this one has been around since year zero, evidently.
Tiny houses require at least some downsizing and minimalism. Zero bedrooms, zero baths, and built in the year zero is taking that to an extreme, or is a sign that the listing is so new they haven't filled in the blanks yet. Things we know for sure: it is a 400 square foot waterfront cabin outside of Gig Harbor beside Colvos Passage looking across at Vashon Island with a nice view, beach, bulkhead, and place to relax. Oh yeah, and the price, $129,950, far less than most condos in Seattle. As tinies go, 400 square feet is palatial, especially if there's no bedroom or bath; but, there is a bed in a room up the stairs. As for the bath and its room; water needs a well, and the septic is listed as none. That may also explain the lack of a kitchen, though they installed a coffeemaker. Heating is listed as none as well; but there is a little electric oil heater, which is probably enough if you're just visiting when the weather is nice. It make lack utilities, but its main usefulness is in its simplicity and remoteness. If you want to get away, this is reasonably far away, without being too far from modern services. Besides, wells, septic systems, heaters, and a few other things are all details that a bit of money and effort (and checking with the regulations) can resolve in a cabin that already has two things nice to find in a property: style and location.