Creating a Room Under a Staircase

Reference Number: KB-00596
Last Modified: July 16, 2015

The information in this article applies to:

Chief Architect Premier or Chief Architect Interiors


How do I create a small room under a staircase in my plan?


Many plans use the space beneath staircases for storage or utilities.

To create a room under a staircase

  1. Select Build> Stairs> Straight Stairs  from the menu, then click and drag to draw a staircase.

  2. Click on the stairs to select them, then click the Open Object  edit button. On the Style panel of the Staircase Specification dialog:

    • Make sure that the box beside Open Underneath is checked.

    • Click the OK button to close the dialog and apply your change.

  3. Select Build> Wall> Straight Interior Wall  from the menu, then click and drag to draw interior walls to enclose the area beneath the stairs.

    • Notice that once drawn, walls drawn at the same location as the stairs do not display in floor plan view.

    • Do not draw or extend a wall past the second step of the staircase.

      If you have trouble moving the wall under the edge of the stairs hold down the Ctrl key on a PC or the Command key on a Mac to allow for free movement.

  4. Select Build> Door> Hinged Door  from the menu, then click once on a wall drawn in step 4, above, to place a door at that location.

    If you prefer, you can instead create the door in a 3D view.

  5. Use shelves, cabinets, items from the Fixtures (Interior) library category or other objects to finish the interior of the storage or utility room.

  6. Select 3D> Create Perspective View> Full Camera from the menu, then click and drag a camera arrow towards the room that you created.