What causes a supplemental assessment?

Supplemental assessments are generated due to qualifying changes of ownership or new construction. Well known types of change of ownership are those changes involving a buyer and a seller. However, change of ownership situations also include removing or adding someone’s name from title even when monetary consideration is not exchanged. Typical new construction events may include building a new home, adding on to an existing home, or adding a swimming pool. However, new construction can be considered adding any real property improvements that did not previously exist.