That sort of thing, and one’s where there are standard 2x4xOSB sheathing, flat-panel patterns, and they arrive as a package of walls to be fastened to a foundat

That sort of thing, and one’s where there are standard 2x4xOSB sheathing, flat-panel patterns, and they arrive as a package of walls to be fastened to a foundation or rim joist, and trusses to be placed on top. More or less plug and play. I believe most non-mobile prefab homes have gyproc installed post-construction, not the jointed fibreboard panels used in (older?) mobile homes. A local homeless transitioning apartment block appeared to use a very modular design, a crane lifting frameworks into place. Now that I think of it, I wonder if those were the same units an Albertan motel chain had been using, that were being constructed locally and shipped off on a flatbed. Most home construction is still done on-site, with framing being cut and nailed and clad per the blueprint, and various specialty crews coming through in sequence to housewrap, install siding, wire, plumb, insulate, sheetrock, trim, install windows and doors, lay flooring, roofing, etc. It is astoundingly quick when well-managed and there are no supply chain issues. And then there are ATCO units. I believe the Alberta oilpatch lives in their modular systems.