Restriction on erection of, or addition to, building within street alignment or building line.

(1) No person shall construct any portion of any building within a street alignment prescribed by by-laws provided however that the Commissioner may in his discretion permit additions to a building to be made within a street alignment, if such additions merely add to the height and rest upon an existing building or wall, upon the owner of the building executing an agreement binding himself and his successors-in-interest— (a) not to claim compensation in the event of the Commissioner at any time thereafter calling upon him or such successors to remove any building erected or added to in pursuance of such permission or any portion thereof; and (b) to pay the expenses of such removal : Provided that the Commissioner shall, in every case, in which he gives permission, report his reasons in writing to the Council. (2) If the Commissioner refuses to grant permission to erect or add to any building on the ground that the proposed site falls wholly or in part within a street alignment prescribed by by-laws and if such site or the portion thereof which falls within such alignment be not acquired on behalf of the municipality within three years after the date of such refusal, the municipality shall pay compensation to the owner of the site on an application made by him. (3) No person shall erect or add to any building between a street alignment and a building line prescribed by by-laws except with the permission of the Commissioner who may when granting permission impose such condition as the Council may lay down for such cases.