Definition : Wall - Common wall

Wall erected on the dividing line of two contiguous lots and which belongs in undivided co-ownership to the owners of both of them. The maintenance, repair and rebuilding of the common wall are at the expense of the owners of these lots, in proportion to their respective rights in the wall. Other rules may apply in particular in the event of heightening (increase of the height of the wall). The Civil Code of Québec stipulates that partitions or walls that are not part of the foundations and main walls of a building but which separate a private portion from a common portion or from another private portion are presumed common.

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The characteristic of divided co-ownership is to divide the building into various lots that will be the exclusive property of the co-owners (private portions), and for others that will be the property of all the co-owners (common portions). These lots are identified by an individual number, which was assigned during the cadastral operation. Each of the private lots of the co-ownership thus constituted becomes a unique property. The distinction between the common and private portions is essential, particularly from the point of view of maintenance, which is the responsibility of the syndicate of co-owners for the common portions and of the co-owners for the private portions.   
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Many co-owners carry out work to renovate their apartments, after moving in, to make them more in tune with their tastes and personalities. Redecorating the premises and integrating new equipment,such as in the kitchen or the bathroom, is a legitimate endeavor. To know the rules to be respected, it is better to refer to the declaration of co-ownership. This is how you will have to check, before a project can begin, whether the work in question is subject to prior authorization. Some work can be carried out without prior authorization, while other work requires the approval of the board of directors or of the meeting of co-owners.
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