This is a paid asset, but now you can download Basement Places 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
Basement Places v1.0
Basement Places – Game ready asset of environment with modular parts
Inside asset pack:
151 Meshes, 116 Textures, 48 Materials, 125 Prefabs
– Formats: – Obj