6 ms·Or just buy a dredger and make oneby slayed0 11y agoOr just buy a dredger and make onebrador 11y agoSeriously, how much would it cost per square foot to build an island?slayed0 11y agoI'm sure it would cost a shipload...ctdonath 11y agoMore a matter of cost per cubic foot. Have to find someplace where the seafloor is close to the surface, then dump enough volume of dirt on it to reach a viable altitude.