From as small as 1.2 square meters. The space taken up by an enzie spiral stair will depend entirely on the size stair you choose. It can be as small as one square metre or as large as 7 square metres. This space is taken up on both floors. To determine the actual space used, you may use the free design service, phone 1800 035 078 to get started. We can give you advice on what is right for your particular application.