A vertical co-ownership refers to a collective building where each owner holds a private lot (apartment, commercial space) and a share of the common areas (roof, stairwell, load-bearing structure). Exiting means removing one or more lots from the legal perimeter of the co-ownership association, an operation governed by the law of July 10, 1965. Since 2023, real estate law practitioners have noted a marked increase in requests for division, fueled by the burdensome energy renovation obligations for small associations.
Social cost of a split in vertical co-ownership: vulnerable tenants and owners
Most guides on exiting co-ownership focus on administrative steps. They overlook a crucial aspect: the split redistributes costs among the remaining owners. When a lot leaves the association, the share of common charges it bore is redistributed to the others. For a building with four lots, the exit of just one owner can significantly increase the bills for the three remaining.
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Owners with modest incomes then face a higher call for charges, without having had a say in the timing of the split. Tenants, in turn, suffer the consequences indirectly: a landlord who sees their charges increase may pass on part of the extra cost through a rent adjustment or, in the worst-case scenario, sell the lot, causing a change in landlord and rental instability.
This phenomenon particularly affects small vertical co-ownerships of two to five lots, where the exit of a single participant destabilizes the financial balance of the association. To fully understand these consequences, it is useful to inquire about the procedure to exit a co-ownership with Immopedia before initiating the steps.
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Technical and legal feasibility: check before voting
Exiting a vertical co-ownership is not an automatic right. It assumes that the lot can function independently once detached from the association. In a collective building, this autonomy presents issues that horizontal co-ownership (houses on the same plot) does not encounter.
Structural constraints specific to vertical co-ownership
An apartment located on the third floor shares the load-bearing structure, water networks, drainage systems, and sometimes the collective heating system with the rest of the building. Detaching a lot without independent access to the networks is legally impossible. The surveyor and, if necessary, a technical study office must confirm that the lot can have individual meters, private access to the roadway, and independent fluid supply.
If the building is connected to a collective heating system, the technical separation of the exiting lot involves installing an individual meter or an autonomous heating system. This work, rarely anticipated, can represent a financial hurdle.
The role of the co-ownership regulations
The co-ownership regulations may contain clauses restricting or complicating the split. Some older drafts simply do not foresee the possibility of a lot exit. In this case, modifying the co-ownership regulations is a mandatory prerequisite, subject to a vote in the general assembly.
Vote in the general assembly and majority required for the split
The request for exit must be included in the agenda of a general assembly by the property manager. The requesting co-owner sends a registered letter to the property manager, accompanied by the technical file (surveyor’s plans, opinion from the study office if necessary, draft modification of the co-ownership regulations).
- The split concerning the division of the association requires a majority vote of all co-owners (Article 25 of the law of July 10, 1965), or even unanimity if the co-ownership regulations require it.
- The modification of the distribution of charges after the exit of a lot requires the unanimity of the co-owners, unless a friendly agreement is formalized by notarial deed.
- The refusal of the general assembly can be contested before the judicial court, but the procedural timelines often extend over several years.
Decisions from judicial courts rendered in 2023 and 2024 have confirmed that the legal key to distribution applies unless there is a contrary unanimous agreement. Co-owners who have financed recent work cannot, without the agreement of all, obtain a reallocation based on their actual contributions to conservation charges. This point generates increasing litigation and delays many split projects.
Notary fees and post-vote formalities to finalize the exit
Once a favorable vote is obtained, the exit is formalized by a notarial deed. The notary drafts a modification to the co-ownership regulations, updates the descriptive state of division, and publishes the changes with the land publicity service.
The anticipated costs break down into several items:
- Fees for the surveyor for surveys and updating plans: this cost varies depending on the complexity of the building and the size of the lot.
- Notary fees for drafting the modification deed and land publication.
- Possible fees for the study office to attest to the technical feasibility of separating the networks.
- Costs for bringing the lot into compliance (individual meters, autonomous connections).
The applicant for the split generally bears all these costs, unless otherwise agreed in the general assembly. This point deserves prior negotiation, as some remaining co-owners may agree to contribute if the split enhances their own lot.
Energy renovation and exit timeline
The obligations for collective energy performance diagnostics (DPE) and multi-year work plans imposed on co-ownerships add a temporal constraint. Exiting a vertical co-ownership just before a voted energy renovation program may be perceived as a maneuver to escape funding calls. Some property managers raise this argument to delay the inclusion of the split on the agenda.
Conversely, a co-owner who has already financed insulation or heating system replacement work in their lot may legitimately want to leave the association to avoid contributing a second time through common charges. The exit timeline must take into account the collective work plan to avoid a blockage in the general assembly.
Exiting a vertical co-ownership remains a lengthy operation, typically spanning several years from the initial request to the publication of the modification deed. Anticipating the technical, budgetary, and human aspects, particularly the impact on remaining co-owners and tenants, is as crucial to the success of the project as adhering to the legal steps.