I'm just speculating off what was said and the way I interpret it is that it looks like a fc only feature. The last section of what was said basically states the purpose of the feature is to transfer private chambers, workshop etc. All of which are currently FC features and unavailable in private housing.

They also mentioned that they were undecided wether to allow both private and fc housing to be bought when shirogane is first available or limit it to FC only initially.