Easy to do in SketchUp + V-Ray. Not sure what was used to create that reference image as there’s little way to tell for sure.
Here’s a simplified process to get you started:
See my original model below. You can use section planes to get an exact cut where you want it but that can get messy if you introduce multiple section cuts at once so I instead opted to put the roof on it’s own ‘Tag’ and turn it off.
Then set camera to ‘Parallel Projection’ mode and pick a good view down into the space and save a Scene.
Here is a quick test render. I found that the default sun was too strong and cast too sharp of shadows:
So I turned off the default sun and added a ‘Dome Light’ with an indoor HDRI which gave me much softer shadows and a more diagrammatic look which is closer to your reference example.
To get the white background I just added a white square screenshot in as the ‘background image’ in the frame buffer and adjusted Exposure and White Balance right there to avoid the need to do corrections in Photoshop, or sim.
Let me know if you have any other questions once you get into it.
*Edit - I missed seeing the lines in the reference. @whiterabbitdesigncompany pointed out the process for adding those if desired. See example of what it looks like with lines:
