This is a paid asset, but now you can download Neon Buildings for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
Neon Buildings v1.0
High-quality low-poly Neon City Buildings Pack for use in any Game project or AR/VR Game. Are you planning to make your next amazing futuristic sci-fi game? Then you need this pack of buildings to design your levels. There are 10 types of buildings and each building has 4 material IDs. Each building has around 3.000 polygons. Ready to use prefabs to drag and drop it into your unity 3d project.
Features:
-Polygonal Mesh
-Game Resolution (Game-ready)
Materials:
-Wall
-Glass
-Bluelight
-Magentalight
Textures:
There are no textures. Only solid color materials.