Base Kits: Prefabricated interior and exterior walls, batt insulation, exterior sheathing, precut floor joists, precut rafters, windows and doors, and installation instructions. Full Kits: Base Kit, plus… siding, flooring, cabinets, countertops, interior trim, light fixtures, and plumbing fixtures. Not included: Concrete, sheetrock, mechanical, electrical & plumbing components, roofing material, stair railings, guttering, fasteners, and tools.