Undivided and extinction of condominiumo: how to exit a shared or inherited home

Most guides about a undivided open with the legislation. Open with the exit instead. Article 400 of the Spanish Civil Code says that no co-owner is obliged to remain in a community of property. Nobody can trap you in a property you happen to share. Not a sibling, not an ex-partner, not a fund that bought in behind your back.

That single sentence is worth more than any treatise. It is also routinely ignored by people who spend years locked into an inherited apartment, paying half the IBI and half the roof repairs on a home they never use, because one relative keeps saying no. The exit exists. It has 4 forms, a defined tax cost, and a fallback that works even when the other owners refuse to sign anything at all.

This guide covers what a undivided is, the 4 ways out, how an extinction of condominium works step by step, why it is taxed at approximately 1.5% rather than the 6% to 13% a normal purchase pays, and what happens when nobody agrees.

TL;DR: what a undivided is and how you leave one

A undivided is shared ownership of an undivided property. Two siblings inherit an apartment. A divorcing couple keeps the family home at 50/50. Nobody owns a specific room or a particular half — each of you holds an abstract share in the entire property.

You are never locked in. Article 400 gives every co-owner the right to demand division at any time, without giving reasons. The cleanest way to use it is an extinction of condominium: one owner acquires the property in its entirety and compensates the others in cash. Spanish courts do not characterise that as a sale. It pays AJD instead of ITP, so your tax bill decreases from 6%–13% to approximately 0.75%–1.5%. If nobody agrees, a judge divides the property for you, and an indivisible apartment ends up at public auction, typically considerably below market value.

What a undivided actually is

Articles 392 to 406 of the Civil Code govern all of this. Article 392 defines the community: property belongs pro indiviso when several people own it at once. Under article 393, the shares are presumed equal unless somebody proves otherwise.

Three situations produce almost every case:

• Inheritance. Three siblings inherit the family home. One intends to sell immediately, one intends to retain it, and one has lived abroad for a decade and answers messages every 3 weeks.
• Divorce or separation. A couple purchases at 50/50 and then splits, but the mortgage — unlike the relationship — survives intact and stays in both names.
• Joint purchase. Friends or unmarried partners buy together, with no written regulations covering who uses the property, who pays for what, or how anybody gets out.

The trap is not legal. It is practical. Article 398 requires a majority of interests to manage the property, so a minority owner can block a decision without ever forcing one. And you continue paying regardless. Article 395 obliges you to contribute to conservation costs whether or not you set foot in the property.

One detail the majority of owners overlook: you do not need anybody's permission to sell. Article 399 lets you sell, assign or mortgage your own share whenever you like. Finding a purchaser is the difficult part: you are offering a fraction of a property that no single person controls.

The 4 ways out of a undivided

Rank them by cost and speed. One pattern appears immediately: agreement is always cheaper than court.

• 1. One owner buys the rest out (extinction of condominium). The cleanest route by a distance. The property is valued, one co-owner acquires it in its entirety, the others are compensated in cash, and the operation is taxed at approximately 0.75%–1.5% AJD instead of full transfer tax.
• 2. Sell the whole property and distribute the proceeds. Article 404 contemplates this where the property cannot be divided, which is the situation with almost any apartment. You get a market price rather than an auction price, but you need unanimity to do it.
• 3. Sell your share to a third party. Legal under article 399, brutal in practice. The specialist funds that buy undivided shares apply a heavy discount, because they are purchasing a conflict along with the underlying property.
• 4. Court division (acción de división de la cosa común). The nuclear option, and the reason the first 3 work at all. Any co-owner may litigate, the action needs no justification, and under article 1965 it never becomes time-barred.

Option 4 exists to make options 1 to 3 possible. A co-owner who understands that a judge can force a sale, regardless of their opinion, becomes a considerably more reasonable negotiator. Most of these disputes settle before anyone files anything.

Extinction of condominium, step by step

This is the route that pays the least tax, and the sequence of the operations is what preserves the favourable treatment.

• Agree a valuation. Adopt the Catastro reference valuation as your floor. Since 2022 it operates as the default tax base, and an artificially low figure will simply be corrected by the regional authority.
• Assign the property to one co-owner. A home is legally indivisible, and article 404 allows exactly this: the whole property goes to one owner, who compensates everybody else.
• Compensate in cash. Pay the exiting owners the valuation of their participation. Compensate with other properties, or pay less than the share is worth, and the tax treatment changes against you.
• Sign before a notary. The public deed is what triggers AJD in the first place; without it there is no gradual quota to pay and no title to register.
• File the tax. Model 600, generally within 30 working days of signature, at the tax agency of the region where the property sits.
• Register. Inscribe your new sole ownership at the Land Registry so the change is enforceable against third parties.

If a mortgage is still running, add one further step. The bank has to release the exiting owner from the loan, and it is under no obligation to agree. That negotiation, not the notary, is what delays most of these operations.

The tax rule that changes the maths: AJD, not ITP

Here is the number that determines the entire calculation. A normal second-hand purchase pays ITP at 6% in Madrid, 7% in Andalusia, 8% in Galicia and 10% in Catalonia, climbing to 13% in the upper brackets in Catalonia and the Balearics.

An extinction of condominiumo does not pay ITP at all.

The Supreme Court has held repeatedly that dissolving a community is not a transfer of property. It is the specification of an abstract right you already held. Under article 7.2.B) of the consolidated ITPAJD law (Royal Legislative Decree 1/1993), only declared excess allocations fall into ITP. The rest is taxed as AJD — the gradual stamp duty on notarial deeds — at 1.5% as the general regional rate and 0.75% in Madrid.

The base is narrower too. In judgment 1484/2018 of 9 October, the Supreme Court fixed the doctrine: the taxable base is only the share you acquire, not the total value of the property. The Dirección General de Tributos confirmed it in binding ruling V3344-19. The Court extended the criterion in judgments 1502/2019 and 719/2024.

Run it on a €300,000 apartment owned 50/50, where one sibling takes the whole:

• Taxed as a purchase (ITP, Catalonia, 10%): 10% of €150,000 = €15,000.
• Taxed as extinction of condominium(AJD, 1.5%): 1.5% of €150,000 = €2,250.
• Difference: €12,750 on an economically identical operation, decided entirely by how the notarial deed is structured.

Two conditions protect that treatment: the property has to be indivisible, and the compensation has to be proportional to each share. Pay somebody more than their quota and you have created an excess allocation, which is taxed as an ordinary onerous transfer at the full ITP rate. Watch IRPF as well. Article 33.2.a) of Law 35/2006 states that dividing common property is not in itself a capital alteration. That shield disappears the moment updated values produce an actual capital gain for one of you.

When nobody agrees: court division and the auction

Sometimes one owner simply refuses to move. Then you litigate.

The acción de división de la cosa común cannot be obstructed. It requires no justification and has no deadline. A judge will either divide the property physically, which almost never works with an apartment, or order it sold at public auction through the BOE auction portal, distributing the proceeds by participation.

Be honest with yourself about what that means in practice. Auctions clear below market value. On top of the discount you are adding lawyers, procurador, judicial costs and, frequently, years of your life. Even an agreed lock-up expires: the pact of indivision permitted by article 400 cannot exceed 10 years.

The conclusion is uncomfortable but consistent. The threat of court is worth considerably more than court itself. Use it to force an agreement, not to reach a judge.

From a forced co-ownership to a structured one

Step back from the legislation for a moment. The problem with a undivided is not that a property has several owners; it is that the property has several owners and no governing regulations whatsoever.

Nobody chose the arrangement. Nobody agreed who gets the property in August, who pays for the new roof, or how any of you would leave. The Civil Code resolves that vacuum with a singularly blunt instrument — divide it, or sell it.

Structured co-ownership inverts every one of those defects, starting with the fact that you choose to enter it. Each home is held in a company divided into 8 shares. Usage is allocated by a rule rather than by argument, running costs are apportioned in advance, and the exit is defined before you sign. The property is shared; the conflict is eliminated. That is the entire difference between a undivided you inherited and a co-ownership you designed. Buying from abroad? The process, taxes and paperwork are set out in this guide to buying property in Spain as a foreigner. The homes currently available are at VIVLA listings.

Frequently asked questions

Can I be forced to sell my share of an inherited property?

Not directly, but effectively yes. No co-owner can compel you to sell your share to them. But any of them can bring an action to divide the common property under article 400, and if the property is indivisible the judge can order a public auction. Refusing to negotiate does not preserve the status quo. It typically just lowers the price everybody receives.

What tax does an extinction of condominium pay?

AJD rather than ITP. The gradual stamp duty is typically 1.5%, or 0.75% in Madrid, and it applies only to the share being acquired, following Supreme Court judgment 1484/2018. Several regions bonify it heavily in divorce cases. If the compensation is disproportionate, the excess is taxed as a transfer at the full ITP rate of 6% to 13%.

Can I sell my part of a undivided without the others?

Yes. Article 399 of the Civil Code lets you sell, assign or mortgage your share freely, and the remaining owners cannot veto it. The obstacle is commercial, not legal. Specialist funds do buy these shares, but at a steep discount, because what they are really buying is a dispute with the people who stayed.

How long does it take to dissolve a undivided?

With agreement, weeks — valuation, deed, tax, registry — plus whatever time the bank needs if a mortgage has to be renegotiated. Without agreement, a court division routinely runs into years and ends at auction. The distance between those 2 timelines is the whole argument for settling.

Are a undivided and co-ownership the same thing?

Legally they overlap, but in practice they are opposites. A undivided is unwanted and unregulated, arriving through an inheritance or a divorce nobody anticipated. Managed co-ownership is chosen. The split, the usage calendar and the exit route are agreed before anybody signs.

This article is general information, not legal or tax advice. Rates, deductions and regional bonuses change; confirm your own position with a lawyer or tax adviser before signing. Sources: Spanish Civil Code, articles 392–406 (BOE); Royal Legislative Decree 1/1993 (ITPAJD); Supreme Court judgments 1484/2018, 1502/2019 and 719/2024; DGT binding ruling V3344-19.