The answer is Yes; as long as the concrete slab is of the correct size, is free from cracks and is a minimum of 4” deep. If your pre-existing base is too high, the building will exceed 2.5m and require planning permission. Our team will be able to advise you on your base and if any work needs to be carried out. A lot of the times it can’t be used or modified.
This can only be determined by a full site survey and testing the existing base.