A Barony: This type of SCA group is formed where there is a very large density of population and more than twenty-five experienced sustaining members of the SCA wishing to be recognized as a Barony. A barony is seldom formed as a new group but is more often an elevation from an already existing shire. Baronies are considered the most stable type of groups because of their large membership participation, diverse SCA experience, and contributions of the players to their Kingdom at large. Baronies are required to bid on hosting one Kingdom level event annually.

A College: These groups are formed at educational institutions where membership fluctuates due to changes in student enrollment.  The reporting requirements for this type of group are the same as full Incipient Shires; however, during normal periods of inactivity like summer break, reporting is suspended with no negative impact on the group.  A college may choose to work with a fully recognized group of the SCA if there is one nearby.  This relationship is a formal one called sponsorship, and the local group acts as a reporting layer between the college and the kingdom.

A Household: Broadly, an SCA household is a group of people who are friends who gather together for mutual support or interest.
Typically, a household will hang around together at day events and camp together at camping events. There can be as few as three members or as many as several hundred. They might call themselves a household, a ship, or a clan.
Households don't have any official status in the SCA. You don't have to get anyone's permission to form one. Households come and go. They are a natural and recognized part of SCA life.