In this full build video, I walk you through the interior build of a DIY tiny home on a 20-foot trailer—step by step, with the real timeline and the real process. This one took us exactly four weeks, and I show how I approach the big interior phases that make a tiny home actually feel finished: layout decisions, getting the core systems moving in the right direction, and installing the stuff you’ll live with every day like flooring, lighting, kitchen pieces, and safety items. I also call out a bunch of the products I used along the way—everything from PEX plumbing tools and fittings to the floors, cabinets, fridge, and lighting. The goal is always the same on my builds: keep it practical, keep it clean, and choose materials that are straightforward to install without doing anything “fancy” that won’t hold up on the road. And if you’re following this build, make sure you’re watching for part two, because that’s where we jump into finishing the bathroom and wrapping up the interior details.