Section 2(4) in Tamil Nadu Combined Development and Building Rules, 2019
(4)"Addition and/or Alteration" means a change from one occupancy to another, or a structural change including an addition to the area or change in height or the removal of part of building, or any change to the structure, such as the construction or removal or cutting into of any wall or part of a wall, partition, column, beam, joist, floor including a mezzanine floor or other support, or a change to or closing of any required means of access ingress or egress or a change to fixtures or equipment" as provided in these Rules;
