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I think it depends on whether you are talking a small settlement, or a vast city. If it is the vanguard of a discovery/colony fleet then I think most of the buildings would be things that they could drop from space. Containers and such. The longer a settlement is there, then I think you would start to see native materials being used. It would almost always be cheaper to use materials on hand than to constantly import raw material. Bring in the equipment, sure, but not the building blocks themselves.