Joint Ownership of Property in Spain: Copropiedad, Proindiviso and the Co-Owner’s Rights (2026)

How Spanish law treats a property owned by more than one person, and what the Código Civil default rules mean for co-buyers who do not draw up a written agreement.

Spanish joint ownership is built on a single concept: when two or more people own one property, each holds an abstract share of an undivided whole, not a defined room or a fenced-off plot. The Código Civil calls this the comunidad de bienes and regulates it in articles 392 to 406, the default framework that applies unless a contract or a regional foral law says otherwise. For a foreign buyer purchasing a Costa del Sol apartment with a spouse, a sibling or an investment partner, these default rules decide who can vote, who pays, who can force a sale, and what happens when one co-owner wants out. The framework is more permissive than many buyers expect, and its gaps are exactly where a written co-ownership agreement earns its keep.

What is copropiedad or proindiviso in Spanish property law?

Copropiedad and proindiviso are the two Spanish terms for ordinary co-ownership of a single asset by several persons. Article 392 of the Código Civil defines the comunidad de bienes as the situation in which the ownership of a thing or a right belongs pro indiviso to several people, meaning each owner holds an abstract, undivided share rather than a physically separated part. Article 393 then fixes the default economics: participation in benefits and charges is proportional to each co-owner’s quota, and quotas are presumed equal unless proof shows otherwise.

The practical consequence for a property purchase is that a deed which simply lists two buyers without stating percentages registers them at 50% each, regardless of who paid what. A buyer contributing 70% of the price must ensure the deed records a 70% indivisa share, because the Registro de la Propiedad inscribes what the escritura states. Article 54.1 of the Reglamento Hipotecario, approved by the Decreto of 14 February 1947, requires the deed to express the indivisa share of each condueño with mathematical precision that allows it to be known without doubt. The Colegio de Registradores reflects that split on the title and the nota simple. Our buying as a foreigner guide explains how that inscription fits into the wider purchase process.

How does a co-owner use and maintain the property?

The Código Civil gives each co-owner a right of use and a duty of upkeep that track their share. Article 394 permits each participant to use the common thing according to its intended purpose, provided that use does not prejudice the community or block the other co-owners from exercising the same right. Article 395 goes further and allows any co-owner to compel the others to contribute to the costs of conservation, with the sole exception being a co-owner who formally renounces their share in the dominion. That makes maintenance a mandatory cost, not a voluntary one, which matters when one co-owner wants to repair the roof and the other would rather defer.

The same logic applies to recurring ownership costs. Community fees on an apartment block, covered in our community fees guide, are owed by the community of owners as a whole and then allocated internally among co-owners in proportion to their shares. A co-owner who pays more than their quota can reclaim the excess from the others. The same proportional rule governs IBI, insurance and the non-resident imputed income tax covered in our holding taxes guide, each of which falls on the property as a whole.

Who decides how a jointly owned property is managed?

Decision type	Rule	Código Civil article
Routine administration	Majority of co-owners by interest share	Art. 398
Alterations to the common thing	Unanimous consent required	Art. 397
Sale of the whole property	Unanimous consent required	Art. 399
Sale of an individual share	Each co-owner may freely sell	Art. 399
Demand for division	Any single co-owner, at any time	Art. 400
Pact to keep indivisa	Written, maximum 10 years, renewable	Art. 400

Article 398 is the governance rule that surprises the most co-buyers. The administration and better enjoyment of the common thing are governed by the agreements of the majority of the participants, and the majority is measured by the quantity of interests, not by headcount. A 70% shareholder can therefore outvote a 30% shareholder on management acts such as hiring a letting agent or approving a repair. Where there is no majority, or where an agreement is gravely prejudicial, Article 398 allows a judge to intervene or to appoint an administrator. Article 397, by contrast, draws a hard line on alterations: no co-owner may make alterations to the common thing without the consent of the others, even where the change would be advantageous, which prevents one owner from knocking through a wall the other wanted kept.

The asymmetry between routine management and alterations is the core reason a written co-ownership agreement matters. The default rules do not cover use rotations for a holiday home, scheduling of letting periods, or what happens if one co-owner wants to refurbish and the other does not. A deed that simply records two names at 50% each leaves every non-routine decision to unanimity, which is precisely where shared ownership most often breaks down.

Can a co-owner sell or mortgage their share independently?

Yes. Article 399 of the Código Civil gives each co-owner full ownership of their part and its fruits, with the power to alienate, cede or mortgage it. The effect of that alienation or mortgage against the other co-owners is limited, however, to the portion that would be adjudicated to the selling co-owner if the community were divided. A buyer of a share therefore steps into the seller’s shoes for division purposes, not for the whole property.

That freedom to sell is what triggers the retracto de comuneros. Article 1522 of the Código Civil provides that a co-owner of a common thing may exercise the right of retract when the share of any of the other co-owners is sold to a stranger, and where two or more co-owners wish to exercise it they may only do so pro rata to the portion they hold in the common thing. Article 1524 fixes the deadline at nine natural days from registration in the Registro de la Propiedad, or failing that, from the moment the retrayent had knowledge of the sale. The right lets the remaining co-owners substitute themselves for the outsider buyer on the same terms and price within that window. The mechanism keeps an unwanted third party out of a shared property without blocking the sale itself.

What STS 1465/2025 clarified about the nine-day clock

The Tribunal Supremo ruled on 21 October 2025 (STS 1465/2025, Sala de lo Civil) that the nine-day deadline under Article 1524 starts at the moment of inscription in the Registro de la Propiedad, regardless of whether the retrayent knew the sale price or other transaction details. The case concerned a 50% indivisa share of a Madrid property sold at judicial auction and inscribed on 3 April 2014; the co-owner filed the retracto demand 40 days later, arguing that the Registry entry did not show the adjudication price and so the clock could not have started. The Supreme Court rejected this argument, holding that registration creates an irrebuttable presumption of knowledge: from the day the transfer appears in the Registro, the nine-day window runs automatically, and the retrayent cannot extend it by claiming insufficient information. The Court stressed that the retracto must be interpreted restrictively because it limits the buyer’s property rights, and that the brief nine-day period exists for legal certainty, so that ownership of an indivisa share does not remain uncertain indefinitely.

This ruling has practical bite for co-owners of Costa del Sol property. A non-resident who does not regularly monitor the Registro can lose the retracto right without ever knowing a sale was imminent. The safest protection is a co-ownership agreement with a pre-sale tanteo clause that forces a selling co-owner to offer the share to the others before going to market, which is far easier to police than a nine-day post-sale clawback. Our buying through a company guide sets out the alternative of holding through a Sociedad Limitada, where share transfer rules in the company statutes replace the Código Civil defaults entirely.

How can co-owners end a joint ownership?

Spanish law treats co-ownership as inherently unstable and gives every participant a unilateral exit right. Article 400 states that no co-owner is obliged to remain in the community and may demand division at any time. The only way to bind co-owners to keep the property indivisa is a written pact, capped at a maximum of ten years and renewable. Without such a pact, any co-owner can force a division whenever they choose, which for an indivisible property such as a single apartment usually means a sale and distribution of the proceeds.

Article 401 sets the limit: division cannot be demanded if it would make the thing inservible, that is, unserviceable. For a building, Article 401 allows division by adjudicating independent floors or locales where the structure permits, which is why the horizontal property regime in Article 396 exists as a specialised form of co-ownership for apartment blocks. Our guide to the Ley de Propiedad Horizontal covers that separate regime, which governs the relationship between private units and common elements in a vertical building.

The division itself follows the inheritance rules of Article 406, which applies the same partition logic used for estates. Creditors and assignees of a co-owner may participate in the division and oppose one made without their presence under Article 403, though they cannot impugn a completed division unless there was fraud or prior formal opposition. When the property is essentially indivisible and the co-owners cannot agree on adjudication to one of them, Article 404 requires a sale and distribution of the price. The practical route for most co-buyers is an extrajudicial agreement on the sale price and the split, with a notary recording the extinción de condominio; the judicial route is the fallback when agreement fails.

How does joint ownership interact with inheritance and tax?

When a co-owner dies, their indivisa share passes to their heirs, not to the surviving co-owners, unless a will or a right of accretion says otherwise. The heirs enter the community in the deceased’s place, which means a 50% share held by a spouse can pass to children from a prior marriage, leaving the survivor in a new co-ownership with people they did not choose. A Spanish will is the standard instrument to direct the share and avoid the forced-heirship rules of the Código Civil, and the Andalusia 99% bonificacion covered in our inheritance tax guide sharply reduces the tax on close-family successions.

For non-resident co-owners, the tax position is the same per share as for a sole owner. Each co-owner files their own Modelo 210 for imputed income and rental income, and each accounts for their share of any capital gain on a sale under the 19% non-resident CGT regime and the 3% buyer retention explained in our non-resident CGT guide. The plusvalia municipal on a sale falls on the land value uplift for the whole property and is allocated by share, so a 50% co-owner pays 50% of the local levy. None of these taxes change because the property is jointly held; they simply apply proportionally.

What should a co-ownership agreement cover?

Clause	What it fixes	Default without a clause
Unequal shares	Records who paid what	Equal quotas presumed (Art. 393)
Use and rotation	Sets who uses the property when	Each may use per destination (Art. 394)
Cost allocation	Fixes maintenance and tax splits	Proportional to share (Art. 393)
Alteration consent	Defines what counts as routine vs alteration	Unanimity for alterations (Art. 397)
Tanteo / first refusal	Pre-sale offer right to co-owners	Only post-sale retracto, 9-day window (Arts. 1522, 1524)
Indivision pact	Binds co-owners not to demand division	Any co-owner can force division (Art. 400)
Dispute resolution	Names a mediator or arbitrator	Judicial administrator (Art. 398)

A written agreement is the only way to move off the Código Civil defaults, and it should be recorded in the escritura or a separate notarial deed so it binds successors. The most common gaps the default rules leave are use scheduling, which a holiday home almost always needs, and the sale-trigger mechanism, which the 10-year indivision pact in Article 400 is designed to address. An independent lawyer, whose role our do you need a lawyer guide explains, should draft the agreement so it does not fall foul of the imperative rules the Código Civil sets on division and alienation.

This guide is general information, not legal or tax advice. Rules change and individual circumstances differ. Verify current requirements with an independent lawyer (abogado) or tax advisor (gestor/asesor fiscal) before acting.