Civil Code (Cap. 16), article 418

418. (1) Every owner may also make common, in whole or in part, a wall contiguous to his tenement by reimbursing to the o wner of the wall one-half of its total value, or one-half of the val ue of that portion which he desires to make common, and one-half of t he value of the land on which the wall is built, and by carrying o ut such works as may be necessary to avoid causing damage to his neighbour. (2) The provisions of this article shall not apply in the case o f buildings destined for public use. Works to or on common wall, or deposit of manure, etc., against common wall.