Lighting and Atmosphere: 

Ultra Dynamic Sky, Baked Lighting + Lumen 
Modeling: Blender
Texturing/Painting: Substance Painter

The building is big with details in each floor so I have provided some of the models plus their substance painter details as well. I was also switching between UDS and traditional skylights to see each effect, the first one is naturally hyper-realistic but costly, second one fast and reliable but not as artistic as UDS based on my experience.