Feature stairs can be either classic or contemporary in design because what defines them is not so much their style as their prominence and importance to the interior design as a whole. the details and conformations. These are the best sample designs of modern stairs design ideas that you may use as the guidelines and great inspiration to your modern residential interior design. What do you do with that bit of empty space under the stairs? It’s been a question that has been long asked. There have been many ingenious answers. We take a look at some of them here.