Co-Ownership of a House in Mexico: How It Works and How to Exit

It is very common for a single house to have more than one owner: siblings who inherited the property from their parents, a couple who bought together, or partners who invested jointly. This situation is called co-ownership (copropiedad), and although it seems simple at first, over time it often raises questions and even conflicts: Can I sell my share without the others' permission? What happens if one owner wants to sell and another doesn't? How do I get out of a co-ownership that no longer works for me? In this guide we explain clearly how co-ownership of a house works in Mexico, what your rights and obligations are, and the different ways to dissolve it.

What is co-ownership of a house?

Co-ownership exists when a single property belongs to two or more people at the same time. Instead of each person owning a particular room or a specific physical part of the house, everyone owns the entire property in a certain proportion, known as the ownership percentage or share (alícuota). For example, three siblings who inherit the family home in equal parts would each hold one third (roughly 33.3%) of the entire property.

That percentage does not mean a co-owner is entitled to "the back half" or "the upstairs room," but rather an undivided fraction of the whole. The percentages are usually recorded in the deeds (escrituras) and, in the case of an inheritance, in the resolution of the succession or inheritance process for the property. When nothing else is specified, it is common to presume that the shares are equal among all co-owners.

Rights and obligations of co-owners

Co-ownership divides both the benefits and the burdens of the property. In general terms, each co-owner keeps certain individual rights over their share, but must respect the other owners' rights over the common property. These are the points worth keeping in mind.

Main rights

• Use and enjoy the house, as long as you do not prevent the other co-owners from using it too.
• Take part in decisions about the property, in proportion to your percentage.
• Sell, assign or bequeath your share, while respecting the other owners' preferential right.
• Receive your proportional share of the fruits of the property, such as rent if the house is leased.
• Request, in principle, that the co-ownership be ended through division or sale of the property.

Main obligations

• Contribute to upkeep and maintenance costs in proportion to your percentage.
• Pay your corresponding share of taxes such as the predial (property tax) and shared utilities.
• Not make major changes or improvements without the agreement of the other co-owners.
• Not dispose of the entire property on your own, only of your share.
• Respect the use and enjoyment that also belongs to the other owners.

How to sell your share and the right of first refusal

One of the most common questions is whether you can sell your percentage without the others' permission. In general terms, yes, you can sell your share of the co-ownership, because it is yours. However, there is a very important legal concept you must respect: the derecho del tanto (right of first refusal).

The derecho del tanto is the preference the other co-owners have to buy your share before a third party, on equal terms. In other words, if you decide to sell your percentage, you must first notify the other owners and offer it to them at the same price you would be willing to accept from a stranger. Only if they decline or do not respond within the applicable period can you freely sell to someone else.

Selling only a fraction of a house is usually harder than selling the whole property, because few outside buyers want to enter a co-ownership with strangers. That is why the most practical solution is often for the co-owners themselves to buy your share, or for everyone to agree to sell the entire house and split the proceeds. If your case involves an inheritance or you want to transfer your portion to a family member, also check out the guide on the assignment of rights to a house (cesión de derechos), a common way to transfer your interest.

Division of the common property

A general principle of co-ownership is that no one is obliged to remain in it forever. Any co-owner can, in principle, ask that the co-ownership be ended. This is called division of the common property (división de la cosa común), and it can basically happen in two ways.

The key point is that a typical residential house is not easy to divide physically without losing functionality or value. Splitting a large piece of land into lots is not the same as cutting a home in two. That is why, in practice, when the co-owners of a house cannot reach an agreement, the most common outcome is the sale of the entire property and the distribution of the money according to each person's percentage.

Common conflicts among heirs and couples

Co-ownership accounts for a good share of real-estate disputes in Mexico, especially in two scenarios: inheritances among siblings and couple separations. Knowing the typical conflicts helps you anticipate them.

The best way to avoid these problems is to set clear rules from the outset and, when a conflict already exists, to seek an agreement between the parties first before turning to the courts. A written agreement on who uses the house, how expenses are split and what happens if someone wants out can save years of grief. In inheritance matters, having a will and a properly resolved succession greatly reduces friction among siblings.

How to dissolve the co-ownership

Getting out of a co-ownership, or ending it entirely, can be done in several ways. The most convenient route will depend on whether or not the owners agree. These are the most common alternatives, ordered from most desirable to most costly.

The court route is usually the last resort, because it involves time, expense and strain between the parties. Before getting there, it is almost always worth trying to reach an agreement, relying on a notary public (notario público) and properly appraising the house so the split is fair. If you are thinking about buying out your co-owners or selling the entire property, a good starting point is to learn its market value with our tool to calculate how much a house is worth, and to explore price references for similar properties in our catalog.

Frequently asked questions

Can I sell my share of the house without the other co-owners' permission?

In general terms, yes, because your percentage is yours. However, you must respect the derecho del tanto: you first have to offer your share to the other co-owners on equal terms. Only if they don't want it can you sell it to a third party.

What happens if one of the owners wants to sell and the others don't?

As a principle, no one is obliged to remain in the co-ownership. If there is no agreement, that co-owner can request division of the common property, which in the case of a house usually translates into selling the property and splitting the money. Before going to court, it is always preferable to try to reach an agreement.

How are the expenses of a co-owned house divided?

As a general rule, maintenance costs, predial and shared utilities are divided in proportion to each owner's percentage. If a co-owner pays more than their share, they are usually entitled to demand the others' portion, so it is wise to keep the receipts.

Can a co-owner live in the house without paying the others?

It is a frequent source of conflict. All co-owners have the right to use the property, so one owner should not prevent the others from using it or benefit exclusively without compensating them. The ideal is to agree in writing on the use and any compensation, and if there is no agreement, to seek legal advice.