Help please

@ScarreCrowee     Hi! I agree with Soltaire that the interior floor height looks a bit higher than the exterior.  However, instead of adjusting the foundation, it looks like there's an interior platform that needs adjusting.  I've recreated a portion here for a visual.  I raised one of the windows to the same level as the door to show how the inside platform is visible through the left window, the yellow circle.

This is similar to your image in that the door is higher than the exterior and the interior floor is visible through the windows. To lower the interior room's platform, click inside the room (on a wall or the floor) to select it. Then using the controls, click the down arrow to lower the platform. In this example, I only have to click down once.

Now my door is level with the exterior and I moved that one window to be level as well.

I hope this helps!