Buying Property Together in Mexico: Co-Ownership Guide

Many buyers purchase Mexican real estate with another person — a spouse, partner, family member, or business partner. The legal framework for co-ownership in Mexico is well-established, but it has implications you should understand before signing anything. Getting the structure right at purchase is much easier than fixing it later.

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The Legal Framework: Copropiedad

When two or more people own property together in Mexico under direct title, it’s called copropiedad (co-ownership). Each owner holds a specified fractional interest in the property, documented in the deed.

Basic principles:

• Each co-owner holds their percentage as their individual property
• For the property to be sold, mortgaged, or significantly altered, all co-owners must agree
• If co-owners disagree and can’t resolve it, any co-owner can petition a court to force a sale (división de cosa en común)
• Each co-owner can sell their percentage independently — but this is practically difficult since buyers rarely want a partial interest in a house

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Married Couples: The Marital Regime Matters

For married buyers, the question of ownership structure starts with the marital regime. Mexico recognizes two main regimes for property ownership within marriage:

Sociedad Conyugal (Conjugal Partnership / Community Property)

Under this regime:

• Property acquired during marriage belongs to both spouses equally (50/50)
• It doesn’t matter whose name is on the deed — both own it
• On death, the surviving spouse retains their 50% and inherits the other 50% (or it passes per will)
• On divorce, community property is divided

Which couples use this: Default regime in many states for marriages contracted in Mexico; also elected by some couples who prefer equality regardless of whose funds were used

Separación de Bienes (Separation of Property)

Under this regime:

• Each spouse owns independently what they purchase
• The deed reflects who bought it
• On death or divorce, each takes their own property

Which couples use this: Often elected by couples who bring significantly different assets into the marriage, have different citizenship/residency situations, or want clear independent ownership for estate planning or financing reasons

Which Regime Applies to Foreign Couples?

If you’re married in the US, Canada, or Europe and buying property in Mexico, the applicable marital regime is determined by:

• Where you were married
• Any prenuptial agreement you have
• The notary’s assessment of applicable law

This matters significantly for the deed. Your notary will ask about your marital regime to determine whether one name on the deed means one owner or two. Clarify this explicitly with your notary before closing.

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Unmarried Couples and Partners

For couples who are not legally married, co-ownership in Mexico is straightforward: both names go on the deed with specified percentages.

Practical points:

• Percentages are flexible — 50/50, 60/40, 70/30 — whatever reflects the financial contribution or desired outcome
• Both parties must sign for any significant transaction involving the property
• There is no automatic inheritance between unmarried partners — a Mexican will is essential to ensure the survivor can inherit the other’s share without full probate

Same-sex couples: Mexico has national recognition of same-sex marriage (Supreme Court ruling). For legal purposes, same-sex married couples have the same options as opposite-sex married couples regarding marital regimes and property ownership.

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Friends or Business Partners Buying Together

Friends or business partners buying investment property together in Mexico is done through either:

Direct co-ownership (copropiedad): Both names on the deed with specified percentages. Simple to set up; harder to exit.

Mexican company (SAS or S.A. de C.V.): The company buys the property, and the partners own shares in the company. This provides more structured governance for decisions, profit distribution, and exit — but adds complexity (annual filings, accounting, corporate governance).

Which to use:

• For 2 people buying a holiday home together: copropiedad is usually simpler
• For investment property with multiple investors, formal return-sharing, or planned future capital raises: a Mexican company structure is more appropriate

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The Co-Owner Agreement: Often Overlooked, Always Needed

For any co-ownership that isn’t a married couple operating harmoniously, a written co-owner agreement (convenio de copropiedad) is strongly recommended. This document covers:

• Each party’s percentage ownership
• How decisions are made (unanimous vs. majority for which types of decisions)
• How renovation, rental, or maintenance costs are allocated
• What happens if one party wants to sell and the other doesn’t
• Rights of first refusal (if one party wants to sell their share, does the other get first option to buy at the offered price?)
• What happens if one party dies
• Dispute resolution process

This is a private agreement between the parties — it doesn’t appear on the deed but is legally binding.

An important point on forced sale: Under Mexican civil law, any co-owner can petition for división de cosa en común — a forced sale through court if co-owners cannot agree. A well-drafted co-owner agreement can specify the process for resolution before reaching this point.

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Fideicomiso and Co-Ownership

If your property requires a fideicomiso (coastal/restricted zone), both parties can be named as joint beneficiaries of the same fideicomiso. The trust document then specifies the relationship (married, co-owners, percentage interests) and designates substitute beneficiaries on death.

Practical point for couples: The fideicomiso beneficiary designation doubles as the inheritance mechanism (no probate) — ensure both parties are named correctly and beneficiaries are designated.

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Practical Checklist for Co-Purchasers

Before closing:

• Decide percentage ownership and discuss what happens if one party wants to exit
• Confirm your marital regime with the notary (if married) and how it’s reflected in the deed
• Execute a co-owner agreement (have a lawyer draft this)
• Execute Mexican wills for each party designating what happens to their share on death
• If using fideicomiso, confirm both parties are named beneficiaries
• Agree on how ongoing costs (HOA, predial, utilities if vacant, maintenance) are split

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Wills and inheritance for foreigners → Can foreigners own property in Mexico? → Fideicomiso guide → Notary vs real estate attorney → Talk to an advisor →

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Co-ownership law in Mexico is well-established but the specifics depend on your marital status, nationality, and the nature of the co-ownership. Always have a licensed Mexican notary and, for complex situations, an independent attorney involved before signing. This guide is informational, not legal advice.