This is a paid asset, but now you can download Storefronts Free.
Detail this asset from Unity Store: Original Link
Storefronts
Add some personality to your 3D cities and towns with this huge supply of restaurants, showrooms, banks, grocers, boutiques, theaters, museums, and more. These street-level facades can range from high-end marble entryways to boarded-up windows with graffiti – and they can all be customized to your liking with different awnings, signage, decorative plants, and other common storefront props.
Designed by Fabio Fernandes, modeled by Sebastian Bielecki, and texturing by Alexey HrDesign, with cover art by Darren Butler.
Please note: Proceed with creativity! You are about to purchase a 3D asset kit that includes elements to set the scene as you build your world, whether it’s for video games, film, television, design, or art. These completely customizable assets will serve as the building blocks to help you create an original environment with Unreal, Unity, Houdini, Blender, Maya, Cinema 4D, and 3ds Max native file support. With a license you can download this kit in multiple file formats, all you need to do is create a free account. Inside this kit you will find: