This is a paid asset, but now you can download Low poly downtown kit for FREE, Please keep in mind this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
For more detail this asset from the Unity Asset Store: Click Here
Low poly downtown kit v1.0 (Latest version)
“If possible, please buy the package to support the developer”
This is low poly down town kit. It contains modular roads, modular trees, gas stations, police station,train station, living private houses, dormitory houses, business buildings, fences, street props, garden props,graphics profile for post processing stack and demo scene. With this kit you will be able to create rich environment with amazing graphics.All models unwrapped in to low res textures, optimized and prepared as prefabs. Buildings colors can be changed by swapping textures from “palettes” folder.