If you are a home owner in Highlands Ranch, you are a member of the Highlands Ranch Community Association. There are several areas in Highlands Ranch that have their own neighborhood associations with a board of directors and an assessment fee which might pay items like common area maintenance or a neighborhood pool. These are considered "sub associations." If you live in a sub association, you pay an HRCA assessment and a sub association assessment. Check this map to see if you live in a sub association.
Highlands Ranch Sub Associations' Master List