Requires Unity 4.5.4 or higher.
Unity 5 Compatible
Create buildings easily within the Unity Editor.
BuildR allows you to generate a building as you want it. Using procedural generation, create large and small buildings that can bring life and fill out your levels.
* One click procedural building generation
* Works in Unity Pro and Indie
* Customise textures, dimensions, styles.
* Generate building interiors, basements, cores and stairs.
* Export your creations to OBJ and FBX.
* No need to run your scene to see your building.
* Fully integrated into the Unity IDE.
* Source code included.
* Supports Substance textures
For more details visit official Asset Link: Click Me!