Staircase drawers (via apartmenttherapy).
If you have a stairs at home, make it functional! A usual stairs can become a great storage space – smart, comfy in using and absolutely invisible. If you’ve decided to build a storage unit under the stairs, you can make it in two ways: make shelves inside and doors outside or just drawers that can be opened from the side of the stairs. Another way, a more creative but more difficult one, is to make drawers inside the steps. You can say that it’s too hard to realize but just imagine – nobody would guess about it and you can even use it as a safe! Read the tutorials below and find out how to do all that!
Under stairs closet (via diyandbuild).
Secret steps storage (via saving4six).
Storage with doors under the stairs (via popularmechanics).
Under stairs bookcase (via dwellcandy).
Staircase storage panels (via offshorecpa).
Under stairs storage (via instructables).