What is a de facto condominium

When a de facto condominium is born

Article 1117 of the Civil Code lists the parts of a building that are common property by default: the ground the building stands on, foundations, load bearing walls, stairs, entrance halls, roofs, facades, and shared systems such as the water supply. As soon as ownership of a building splits into two or more distinct units, whether through a sale, a division following inheritance, or the sale of individual apartments by a developer, these parts automatically fall under joint ownership.

No deed, no constitutive act, and no assembly resolution is needed for this to happen: the Civil Code makes it an automatic legal consequence of split ownership. This is precisely what distinguishes a de facto condominium from a condominium formally constituted by regulation: the second has adopted bylaws and, often, an appointed administrator, while the first exists in law even though nobody has taken any formal step.

Obligations that apply from day one

Even without an administrator or written rules, the co-owners of a de facto condominium are already bound by the Civil Code provisions on condominium: shared expenses for the common parts must be divided according to Article 1123, generally in proportion to the millesimal share of each unit, unless a different criterion applies to specific services such as an elevator used only by some floors.

With more than eight owners, appointing an administrator becomes mandatory under Article 1129: it is not optional past that threshold, and any owner can ask the court to appoint one if the others fail to act. Below eight owners, the co-owners can continue managing informally, but they remain fully liable, jointly and individually, for maintenance and safety of the shared parts, including compliance obligations such as periodic checks on shared systems referenced in standards like UNI 10801 for waste handling equipment where applicable.

Tax code and administrative steps

A de facto condominium that needs to hire a contractor, open a bank account for shared expenses, or simply issue receipts for reimbursements needs its own tax code, requested from the Revenue Agency using the same model used for formally constituted condominiums. The tax code is tied to the building, not to an administrator, so its absence does not stop the condominium existing, but it does stop it from operating cleanly toward suppliers and, once due, for withholding tax obligations on labor.

Practical management, even informal, benefits from the same tools formal condominiums rely on: a ledger of expenses, proof of how costs were split, and a record of decisions taken by the co-owners. Software such as AmministraPro lets a professional administrator, or a co-owner acting informally, track millesimal shares, record shared expenses and generate the documentation needed if the condominium later formalizes bylaws or crosses the eight owner threshold that triggers a mandatory administrator.

From de facto to formally constituted

Nothing prevents the co-owners of a de facto condominium from adopting bylaws and calling a founding assembly at any point, and doing so is advisable once the number of units grows or disputes about shared costs become frequent. The transition does not create a new legal entity: it formalizes governance of something that, under Article 1117, already existed.

Common triggers for formalizing include reaching or approaching eight units, planning significant works on the roof or facade that require documented approval quorums, or simply the practical need for a single point of contact when a professional administrator is appointed.

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