Indicates the total (available plus unavailable) number of accommodation units in an [ApartmentComplex](http://schema.org/ApartmentComplex), or the number of accommodation units for a specific [FloorPlan](http://schema.org/FloorPlan) (within its specific [ApartmentComplex](http://schema.org/ApartmentComplex)). See also [numberOfAvailableAccommodationUnits](http://schema.org/numberOfAvailableAccommodationUnits).