Browse all flatpack steel building kits 2.5m wide, available in lengths 4m to 8m with custom-cut sizing available for a little extra (order the next size up). Choose the standard skillion roof without eaves for the cheapest building that can look very modern too, or choose 450mm eaves for a more traditional style. Add foundation options, and your choice of custom options like glazing, extra insulation, internal lining, etc, to complete your DIY-exempt building or approved owner-builder project. All flatpack steel building kits are engineering-certified Class 1A (habitable) for use as a studio, office, guest cabin, granny flat, tiny house, or main house (STCA as applicable). If you need help with design, approvals, or construction, just ask us. Delivery of flatpack steel building kits available to most sites in NSW, VIC, ACT, SE QLD (crane-truck access permitting).