As these houses are made to be eco-friendly, I remade a solar panel to be used on roof, with, optionnally, a solar water heater (there's also a small non solar water heater in the set, because I like the idea for a small space).
I've also made composting toilets but as I'm unable to mod seriously, they work like any other toilets.
I turned an old tiny washing-machine made for Sims 3 10 years ago into a functional washing machine, it requires only a half-tile.
Someone suggested me to turn the dirty cloth pile into a hamper, and as it fits with a bathroom theme, I made it for this update, though I named it "Slob's life" and not "Tiny House".
The ladder has actually nothing to do with the bathroom but I wanted an alternative to the ones I had already made for the bedroom. :)