Using Open Below Rooms to Define an Opening to a Lower Floor

Reference Number: KB-00210
Last Modified: July 30, 2019

The information in this article applies to:

Home Designer Professional or Home Designer Architectural or Home Designer Suite or Home Designer Interiors or Home Designer Essentials


I want to create an opening or a hole to a lower floor, such as in a loft, balcony or mezzanine from my current floor but I cannot seem to make it work. How do I accomplish this task?


Creating a loft can be accomplished in Home Designer by utilizing a specialized room type called Open Below.

To create an area within a room that opens to a room below

  1. Define the area you wish to open to the floor below by using any combination of the various wall types.

    • If you don't want any physical walls or railings, use the Room Divider  tool by navigating to Build> Wall from the menu.

  2. Using the Select Objects tool, select the room, then click on the Open Object edit button.

  3. On the General panel of the Room Specification dialog that opens, select the Open Below option from the Room Type drop-down menu.

  4. Click OK.

    Floor plan view of the open below room

  5. You should now be able to view an open area in a 3D view.

    Camera view showing the open below room

Note: In Home Designer version 10 and prior versions, if the area you defined is not connected to any other walls, you will need to draw an invisible wall to connect the area to another wall. Home Designer 2012 and newer program versions will automatically create the invisible wall for you as shown in the image below.

Invisible wall connects the open below room to other walls