Is there any relationship between Real Estate Management and Fixed Assets?

I don't quite understand yet how this works. Let's suppose we buy a building, so we need the Fixed Assets module to handle the administration. E.g. depreciation and so on.

And if we would rent this building to several other companies/people, we would need Real Estate Management.

Is there any connection between these two modules? For instance, in REM the building is defined as a business unit. In FA, it's an asset.

How do things "come together"?