Improvements and betterments, like "unit" property, benefit none but the unit owner. Differences in the three associational responsibility classifications ("original specifications," "all in" and "bare walls") require improvements and betterments be classed separately. Unit improvements and betterments are best demonstrated by a unit owner engaging in any activity or improvement that increases the value of the real property within an individual unit.
An example of a unit improvement and betterment would be a unit owner replacing the laminate counters and tile floor with granite and hardwood, respectively. These are upgrades over and above the material used by the builder making the real property value of this example unit greater than when it was completed and likely greater than those units surrounding it. Such increase in value and material is considered an improvement and betterment benefiting only the unit owner. Responsibility for insuring such improvements and betterments changes based on associational responsibility.