Section 181(1) in Karnataka Municipalities Act, 1964
(1)If any part of a building projects beyond the regular line of a public street as prescribed under section 179 or beyond the front of the building on either side thereof, the municipal council may,-(a)if the projecting part thereof is a verandah, step or some other structure external to the main building, then at any time, or(b)if the projecting part is not such external structure as aforesaid, then whenever the greater portion of such building or whenever any material portion of such projecting part has been taken down or burnt down or has fallen down, require by written notice either that the part, or some portion of the part, projecting beyond the said regular line or beyond the said front of the adjoining building on either side thereof, shall be removed, or that such building when being rebuilt shall be set back to or towards the said regular line or the front of such building; and the portion of the land added to the street by such setting back or removal shall thenceforth be deemed part of the public street and be vested in the municipal council.