Need 3D animation for long term

I want someone who can build animation video for architectural project. I want to view my architectural Floor plan in 3D.
Designer has to create process of building/home making from floor plan and then show 3D creation of that building/ home.
Sample videos:
https://www.youtube.com/watch?v=1hLBCOlptq8
https://www.youtube.com/watch?v=CP6xetNWfQk
https://www.youtube.com/watch?v=NZGl5gcafNM