This is a paid asset, but now you can download Modular Building Free.
Detail this asset from cubebrush: Original Link
With this asset, you can create your highly detailed unique buildings from modular elements.
* Wall modules.
* Store Modules.
* Quality texture.
* Finished Building Example.
* Texture Sizes: 4096.
* Number of Prefabs: 12.
* Number of Materials: 9.
* Number of Textures: 9.
* Number of polygons: from 1 to 27.
This asset will help you quickly and easily fill your scene with various buildings, which will speed up the process of creating your projects.