Staircases are a fabulous feature. When designing your new floor, we plan the stairs to look like the existing. The aim is to make it look like it was always there. Over the existing is the preferred position but we look at every option. A staircase has to rise at 42 degrees or less and this restricts its placement. Staircases are a work of art! Below l have included a photo of a “space-saver” only fitted in extreme circumstances and legal only by its unique design. In over 30 years, we have installed two.