Browse all flatpack steel building kits 2.5m to 4.5m wide, lengths 3m to 16m, 2.71m high – in the full range of Colorbond© colours. Custom-cut sizing is available (order the next size up). Choose a standard skillion roof without eaves for the cheapest building with a modern look, or with 450mm eaves for a traditional style. Add foundations and your choice of custom options like glazing, extra insulation, internal lining, etc, to complete your DIY-exempt building or approved owner-builder project. Join kits with custom engineering. 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, ask us. Delivery is available to NSW, VIC, ACT, SE QLD (access permitting).