This is a paid asset, but now you can download OpenOfficeBuildings for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
OpenOfficeBuildings v1.3
Includes:
V1.3:
New building added.
v1.2:
New form added. A few forniture and office props added.
Mesh:
111 fbx files(made on DX11).
all in one fbx files of the building parts is also included.
Building files are grouped stage by stage.
4 corridors to connect(S, M, L, XL) + corridor extension part. Doors, elevator, forniture and office props are seperate.
Prefabs:
115 Prefabs.
A few different building variations for demonstation
3 Textures(Atlased).
3 materials(2 opaque(normal, metalic), 1 transparent)
I would be happy about comments or suggestions for improvement:)