One area of my tiny house that I have come to think about a lot is the bathroom. Now of course you need a bathroom, a place to use the restroom, a place to shower, etc. It can range from in your tiny house flush toilet or composting, to an “outhouse” style with a properly designed system or even a flush toilet; But I am beginning to wonder if a bathroom should be outside the tiny home. It might be using the extra bathroom of the house you’re parked in the back yard of or it might be like Drew over at Tiny R(e)volution who build his “shower shack” photos at bottom of post. I’m not saying you should do this, but I think it warrants discussion.
The reason I’ve been thinking this is because while a bathroom of some form is a necessity, as it is in a tiny house, it takes up so much space and is used so little. This is a really important factor when it comes to small spaces. The amount of square footage should be directly proportional to the amount you use it. So for example your mattress takes up about 30 square feet if you have a queen size bed, which is a lot of space, but you use it for 8 hours every day. Compare that to the bathroom, about 22 square feet, I use it for maybe 30 or less minutes a day for showering, shaving, brushing teeth and going to the bathroom. If you simply look at it like a return on investment a bathroom is not that great use of space.
Now you can reduce your space by building a wet bath (frankly I’m not keen on that idea). You could also setup bathroom and shower outside, using an outdoor shower and bathroom, but there are a few months a year this wouldn’t work well. You also could arrange for whoever house you park your tiny house behind that you can use their bathroom. Obviously nothing will beat the convenience of having a shower and toilet in the actual tiny house, but I still struggle with how much space it uses versus how much I use it.