In this build, I take you through the full bathroom install in our luxury tiny home on a 20-foot trailer—start to finish. This one took me exactly four weeks, and I show the process the way I actually do it on site: planning the layout, getting the shower system right, and building it so it looks high-end but still makes sense for a tiny home that moves down the road. If you’ve been following the series, this is the bathroom portion you guys have been asking for (and if you missed it, go watch parts one and two so the whole tiny home flow makes sense). The big focus is the shower: waterproofing, clean lines, and making it feel like a real home bathroom instead of an RV compromise. I leaned on the Schluter shower system for the walls and waterproofing approach, and I used a custom shower base and niche from Encompass to get the fit and finish dialed in without fighting weird dimensions. Along the way I also tie in some of the other products that help keep the overall tiny home comfortable and livable—like clean water filtration, climate control, lighting, and the little hardware details that make installs cleaner and more repeatable.