Further powers with reference to insanitary building.- (1) Whenever the Commissioner considers --

(a) that any building or portion thereof is, by reason of its having no plinth or having a plinth of insufficient height, or by reason of the want of proper drainage or ventilation or by reason of the impracticability of cleaning, attended with danger of disease to the occupiers thereof or to the inhabitants of the neighbourhood or is, for any reason, likely to endanger the public health or safety, or (b) that a block or group of building is, for any of the said reasons or by reason of the manner in which the buildings are crowded together, attended with such risk as aforesaid, he may, by notice require the owners or occupiers of such buildings or portions of buildings or at his option, the owners of the land occupied by such buildings or portions of buildings, to execute such works or to take such measures as he may deem necessary for the prevention of such danger. (2) No person shall be entitled to compensation for damages sustained by reason of any action taken under or in pursuance of this section save when a building is demolished in pursuance of an order made thereunder or so demolished to such extent as to require reconstruction, in which cases the municipal council shall make compensation to the owner thereof. (3) When any building is so far demolished under this section as to require reconstruction, allowance shall be made in determining the compensation for the benefit accruing to the premises from the improvement thereof.