There are several ways to get the result you want.
You can manually set your camera with a mouse in the viewport that you have no pitch in it. Here’s how it looks in my case. You can grab a high res screenshot then just crop the needed area.
And one more way for more control would be to set up a camera in matinee then capture a viewport.
So under location i set height to 200 cm (Don’t want to see top of the ground floor). Important thing for verticals is to keep pitch (Y axis for rotation) at 0. Then just pull back camera enough until you have whole building. You can also decrease camera FOV (here I lowered from 90 to 60), this will essentially zoom in the camera. After that it’s just to grab a screen shot (preferably high res one) and crop out if needed.
You can even avoid matinee and just grab from the editor viewport. Select camera actor in editor, under arrow (top left), just select “lock viewport to actor” and select “camera view”. Go fullscreen mode with F11, then use TAB and use “highresshot” command (set up some large res like highresshot 5 or maybe even 6). Go into some image editing program like photoshop. Set marquee tool to fixed ratio like 16:9 (or some other), grab what you need, crop it, and downres your image to needed resolution (in my case i wanted 1920x1080). And you get what you need.
Here’s final version of the second picture after cropping and downressing.
Also enable Game mode to hide widgets, and under Settings you can hide editor UI, so no need to even make matinee if you need just screenshots.
If you’re making a video, its really just making sure to have you pitch under you camera rotation to 0. Also depends on your screen how far you’ll have to pull back your camera until you capture everything into the view.