This post-apocalyptic asset  was initially created in UE5 then reassembled in a 3D software. 

The preview images were rendered in Unreal Engine 5 but similar result can also be achieved in Blender ; the only difference is that the grass was rendered using Foliage system in Unreal Engine,you can use a scatter tool  to achieve the same result.

The precision is approximately 512 pixels per meter, and some props placed on the roof have slightly lower precision.

You can see the preview video: https://www.youtube.com/watch?v=L_rcD_VfNg0