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.