CCQ-1991 - Civil Code of Québec

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1005. Each owner may build against a common wall and set beams and joists against it. He shall obtain the concurrence of the other owner on how to proceed.
In case of disagreement, the owner may apply to the court to determine the means necessary to ensure that the new works infringe the rights of the other owner as little as possible.
1991, c. 64, a. 1005.