Section 2(1)(f) in The Kerala Panchayat Buildings Rules, 2011
(f)'alteration' means a structural change, such as an addition to the area or height, or addition of floor/floors or mezzanine floor within any existing floor height, or change of existing floor or change of roof to concrete slab or re-construction of existing walls or construction of concrete beams and columns amounting to structural change, or construction of internal walls for sub-dividing the existing rooms with the intention of changing the use of the room/ rooms which amount to change in the occupancy group of the building under these rules, or closing of any required means of ingress or egress to the building ;