# Add Floors and Stairwells to Your 3D Plan

# 1. Add a Level

To add a floor or a basement: ![](https://outline-production-attachments.s3-accelerate.amazonaws.com/uploads/c7f3c911-90d7-4d33-8983-a110326e0348/d003ea2f-0ab9-45d8-b822-bb6bc7596fd3/level-dialog-EN.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA4EOUDTOVUICLPZ4P%2F20260826%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260826T074500Z&X-Amz-Expires=86400&X-Amz-Signature=e424530fcdaeb8ff7bc75d6ac3ad11d2d8eaac64597f802a039df699e864c0d4&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject " =685x514")


1. Click the icon showing stacked levels at the top right of the screen. A dropdown menu will open with the list of existing levels in your project.
2. Click **Edit** to open the level settings window.
3. On the left-hand column, you’ll see the list of existing levels (floors or basements), stacked vertically:

   **•** The **active level appears in blue**.  
   **•** To add a level, click **Add a level** or **Add a basement**.  
   **•** To **delete a level**, click the trash icon next to it.
4. Enter the name of the selected level (e.g., “Second Floor”, “Basement”, etc.).
5. Adjust the height settings of the selected level:

   **• L – Level height**: Total height between the floor of this level and the floor of the level above.

   **• C – Ceiling thickness**: Thickness of the slab or ceiling separating this level from the one above.

   **• H – Ceiling height**: Height between the floor and ceiling of this level.

   **• G – Distance from the ground**: Vertical offset from the reference ground level.
6. Click **Apply** to confirm your changes.

# 2. Duplicate a Level

To copy an existing floor plan to another level:

 ![](https://outline-production-attachments.s3-accelerate.amazonaws.com/uploads/c7f3c911-90d7-4d33-8983-a110326e0348/4af8ca27-71d2-436e-95fc-6bfd5540d54f/level-duplicate-EN.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA4EOUDTOVUICLPZ4P%2F20260826%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260826T074500Z&X-Amz-Expires=86400&X-Amz-Signature=5d6245e4277e40ede40e7a628a9eef13d7f1a1e45f78bf451fd8dd4c5fd9d150&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject " =920.5x506")


1. **Activate Multi-Select** from the top toolbar.
2. **Draw a rectangle** to select the elements to copy.

   
:::info
   Only elements within the selected area and from the active categories will be copied.

   :::

   ![](https://outline-production-attachments.s3-accelerate.amazonaws.com/uploads/c7f3c911-90d7-4d33-8983-a110326e0348/5adb739b-4a9e-44d1-9990-5b147f22c26c/group-select-filters-EN.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA4EOUDTOVUICLPZ4P%2F20260826%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260826T074500Z&X-Amz-Expires=86400&X-Amz-Signature=c4caf995e30a88c046d2461af5babaf3ec4c38d2c8d3cb937c82f802974b3a3f&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject " =257x148")
3. Click **Copy to Clipboard** in the right panel.
4. **Switch to the target level**, then press `Ctrl`+` V ` (or ` ⌘ `+` V ` on Mac) to paste.
5. Use the 👁 icon to **show or hide lower levels** in the list.  
   ![](https://outline-production-attachments.s3-accelerate.amazonaws.com/uploads/c7f3c911-90d7-4d33-8983-a110326e0348/9cde9e52-a9d2-44a9-a2fb-e439c2d035f9/level-display-EN.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA4EOUDTOVUICLPZ4P%2F20260826%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260826T074500Z&X-Amz-Expires=86400&X-Amz-Signature=c930f9e06338acf5da1139afe8464e4596f23db784a2655f0cbea4fe6210eae1&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject " =262x148.5")

# 3. Draw a Floor Opening

A floor opening is an empty space in the slab, allowing for an element such as a staircase, elevator shaft, or duct.

To place it correctly, it must be drawn **on the level above** — where the hole will appear.

 ![](https://outline-production-attachments.s3-accelerate.amazonaws.com/uploads/c7f3c911-90d7-4d33-8983-a110326e0348/796115dd-49be-403a-9b27-a72eb39ac3d7/flooropening-draw-1-EN.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA4EOUDTOVUICLPZ4P%2F20260826%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260826T074500Z&X-Amz-Expires=86400&X-Amz-Signature=91e76079d270b7344446eabf12b538da375c8d94a75d094d8d7d62911ae789e3&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject " =698x512")

 ![](https://outline-production-attachments.s3-accelerate.amazonaws.com/uploads/c7f3c911-90d7-4d33-8983-a110326e0348/de3e10cb-e780-46f9-a018-618792ed5c78/flooropening-draw-2-EN.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA4EOUDTOVUICLPZ4P%2F20260826%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20260826T074500Z&X-Amz-Expires=86400&X-Amz-Signature=b7de503b869a2a4ea982824a16260eb9a3941f3553d94cedbb4c834a40c4a18d&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject " =670x451")

**Steps to follow:**


1. Select the **Stairwell / Mezzanine** tool from the Drawing Tools menu.
2. Draw the opening by clicking to place the points that define its outline.

   
:::info
   For a clean result in 3D, try placing the points at the center of surrounding walls.

   :::
3. The opening is automatically created and becomes visible in 3D.
4. Display and customize the **name** of the opening area using the right-hand panel.
5. Display and customize the **area** of the opening.
6. Set the **material** that appears on the edge (thickness) of the opening.

Then switch to the **lower level** to add a staircase or other elements, and preview the result in 3D.

# 4. Create a Mezzanine

A mezzanine is a partial floor located at mid-height or upper level, open to the space below. To set it up properly, you need to combine a dedicated level with a floor opening.

**Steps to follow:**


1. **Add a dedicated level**  
   Create a new level (e.g., *Mezzanine*) in the level manager.
   * Assign it a **reduced height** if needed (e.g., 160 to 220 cm depending on your design).
   * Set its **elevation** at mid-height above the main floor (e.g., +140 cm if the main floor is +280 cm).
2. **Draw the mezzanine opening**  
   On this level, use the **Stairwell / Mezzanine** tool to draw an opening in the floor.
   * This opening leaves the space empty and lets you **see the level below** from the mezzanine.
   * Place the contour points to match the desired open area.
3. **Show lower levels if needed**  
   To help position the opening accurately, show lower levels using the 👁 icon in the level selector.
4. **Add stairs, railings, or furniture**  
   Once the mezzanine is in place, you can add specific elements like stairs, low walls, or furniture.  
   The staircase should be added to the level below.

---

**Documents**

- [1. Getting Started with Space Designer 3D](https://spacedesigner3d.getoutline.com/s/space-designer-doc/doc/1-getting-started-with-space-designer-3d-tbTmJC7rsh)
- [2. Managing Your Space Designer 3D Account](https://spacedesigner3d.getoutline.com/s/space-designer-doc/doc/2-managing-your-space-designer-3d-account-9oEJwFd2ZD)
- [3. FAQ – Frequently Asked Questions About Space Designer 3D](https://spacedesigner3d.getoutline.com/s/space-designer-doc/doc/3-faq-frequently-asked-questions-about-space-designer-3d-xeBxyRcBPk)