Dear PR,
Please refere the article on Vastu for Staircase
http://www.gharexpert.com/articles/Vastu-Shastra-1692/Vastu-Shastra-Staircase_0.aspx
As per Vastu Shastra, The South;South-West;West direction should be heavy. So, constructing a staircase in West with steps rising from East to West is good. It is recommanded to construct staircase in clockwise direction, if possible.