Creating a Room Under a Staircase

Reference Number: KB-00596
Last Modified: October 28, 2019

The information in this article applies to:

Chief Architect Premier or Chief Architect Interiors


How do I create a small room under a staircase?

A small closet under a staircase


Many plans use the space beneath staircases for storage or utility closets. 

To create a room under a staircase

  1. Draw your staircase to your specifications. For more information on creating the different types of staircases available in Chief Architect, see this online training video:Stair Basics

    In this example we will use an L-shaped staircase.

  2. Select Build> Wall> Straight Interior Wall Straight Interior Wall icon from the menu.

  3. Draw the interior walls underneath the outer railing of the stair so that the surface of the wall aligns with the outer edge of the staircase as shown below.

    Drawing the interior walls

    Note: Be sure not to draw the end of your room past the second tread at the bottom of the staircase.

  4. Using the Select Objects Select Objects icon tool, select the staircase and click the Open Object Open Object icon edit button.

  5. On the Style panel of the Interior Staircase Specification dialog that opens, check the box next to Open Underneath and uncheck the box next to Open Risers.

    Interior Staircase Specification dialog, Style panel, with Open Underneith selected and Open Risers deselected

    You can also set the Pattern Type to "None" on the "Fill Style" panel, if you want to be able to see under the staircase in floor plan view.

  6. Select Build> Door> Hinged Door Hinged Door icon from the menu, and click on one of the interior walls you just drew to place a door to your room.