Energy use in apartments, lairs, lineage buildings

[Solene]

Unless using powers or feeding/ fighting in the building, can we eliminate the use of energy when moving around apartments, lairs, and lineage buildings? I feel like we can make better use of purchased space this way.
I know it already costs less energy to move around inside, but it would be nice to not have the expenditure at all. Otherwise, it is hardly worth having distinguishable separate spaces.