Is an entry door to a condominium unit considered common element?

Typically, no. The interior of a condominium unit, including the entry door, is considered part of the individual unit and is the responsibility of the unit owner. Common elements are generally the shared areas of the condominium complex such as hallways, lobbies, elevators, and exterior walls. However, it's always a good idea to refer to the specific condominium bylaws and governing documents to confirm the exact delineation of common elements and individual unit boundaries.