Alteration. Any construction, reconstruction, or change of the exterior of an object, site, or structure. Alteration includes but is not limited to: changing of roofing or siding materials; changing, eliminating, or adding doors, door frames, windows, window frames, shutters, fences, railings, porches, balconies, signs, landscaping, sidewalks, driveways, or other ornamentation. For any structure designated as a landmark, this definition may include exterior paint.