Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Modern Building Pack Vol 2 Free.
Modern Building Pack Vol 2 v1.0
***NEW Emissive map for night-time environments!
9 Unique Low Poly Modern Buildings
Unity 5 Ready and Mobile Friendly
Modern Building Pack Vol 1
Rooftop Objects Pack
– Everything in 1 Material for optimized rendering
– 2048×2048 Diffuse(Specular/Reflective on Alpha) and 2048×2048 Bumpmap
– Separate Specular/Smoothness texture for Unity 5 Standard Shader
– Super Low-Poly Collision Mesh
– Certain buildings have secondary detail mesh that can be hidden when viewing from a distance
Email me for questions / support