If you have bought a home in the United States or Canada, you had someone on your side at closing. A real estate attorney, or a title company acting under rules written to protect you.
In Mexico you will meet a notario público instead, and you will be told, correctly, that the notario is a senior legal professional appointed by the state who makes the transaction valid. From there it is easy to assume the notario is the Mexican version of your closing attorney.
They are not equivalents, and the difference is not a technicality. It is the single most useful thing to understand about how a Mexican purchase works.
What a notario actually is
A notario público in Mexico is a public official, appointed by the state, holding a role with no direct US or Canadian equivalent. The notario drafts and authorizes the public deed, verifies the parties and the property, and is responsible for compliance with the law governing their office.
Without the notario, the sale does not exist in a legally effective form. That is a considerably larger role than a notary public in the US, who witnesses signatures.
The duties attached to the role are not folklore, and they are not something an agency gets to characterize as it pleases. They are published. A Mexican official standard, NOM-247-SE-2021, issued in the Diario Oficial de la Federación on March 22, 2022, sets out obligations relating to notarios in residential property sales, and you can read it in full at dof.gob.mx.
The part that matters most: impartiality
Clause 9.2 sets out what the notario is answerable for. They must review the documents in front of them, both on the property and on the parties to the sale, and they are responsible for compliance with the law governing their office in that state, along with the applicable federal, state and municipal law. Then comes the sentence that matters most to a buyer:
“En todo caso, los notarios públicos deben actuar de forma imparcial, con prudencia y otorgando la asesoría que corresponde a cada una de las partes que ante él acudan.”
In any event, notarios must act impartially, with prudence, and give the advice appropriate to each of the parties who come before them.
Read the duties as a buyer and what is absent is as informative as what is present. The notario answers to the documents, to the parties as a pair, and to the law. Nothing in that list is a duty to advance your interests against the other side’s, and the standard says the advice is owed to each party rather than to one. Whether that leaves you represented is not a question of legal theory, it is a practical one, and the practical answer is that nobody in the room is acting for you alone unless you have appointed them.
Put plainly: the notario is jointly obliged to both parties. That is why a buyer who wants someone acting for them alone needs to appoint that person separately.
Want someone acting only for you? Ask us for an introduction to the independent attorneys we work with. They act for you rather than for the transaction, and appointing one early costs less than appointing one late.
So the notario is the person who tells you what the law requires of the deed. The notario will not tell you whether this is a good deal for you, whether you should push back on a clause that favors the seller, or what your position is if the two sides fall out.
If you have a question that is specifically about your own interests rather than about the validity of the transaction, the notario is the wrong person to ask.
Where it applies, the notario must also explain the costs
The same clause requires notarios to “informar y explicar oportunamente al consumidor la integración de los costos que conlleva la escritura”: to inform and explain, in good time, how the costs of the deed are made up.
That is a published duty rather than a courtesy. If you have been given a single bundled figure for closing costs with no breakdown, asking for the composition of the deed costs is not an awkward request. It is a request the standard contemplates.
Your right to choose the notario
Clause 9.1 provides that “el consumidor en todo momento tendrá el derecho de elegir y decidir al notario público”: the consumer has, at all times, the right to choose and decide the notario.
The clause then sets out two qualifications, and both are narrower than they first appear.
For a mortgage-financed purchase: “el consumidor puede elegir, a propuesta del proveedor, al notario público siempre y cuando se encuentre registrado en el padrón de notarios de los organismos nacionales de vivienda e instituciones crediticias correspondientes.” The consumer may choose, on the provider’s proposal, a notario who is on the register kept by the relevant national housing bodies and lending institutions. So even with a mortgage the choice is yours. It is made from the register, and from what the provider proposes, rather than from the whole profession.
Without a mortgage: “cualquiera de las partes puede proponer al notario, respetando en todo caso la libertad de elección del consumidor para designar al mismo.” Either party may propose the notario, while respecting in all cases the consumer’s freedom to designate them.
That second one is worth reading twice, because it describes what usually happens. The seller, the developer or the agency proposing a notario is not a breach of anything. Proposing is expressly allowed. What survives the proposal is your freedom to designate, and the two are easy to confuse when a name arrives already attached to a closing date. Ask who chose the notario and why, even where the answer is perfectly good.
The same clause puts two further duties on the provider. They must supply the documents and information needed to put the deed in your name, and they must be transparent and truthful about how the escrituración will be conducted, how the notario was selected, and the outlays other than the purchase price. If the costs around a closing have been vague, that last one is the obligation to point at.
Where this standard applies, and where the position is less clear
Here is the caveat, and we would rather state it plainly than let you discover it later.
NOM-247-SE-2021 sets out its own scope at numeral 1. It applies “únicamente a los proveedores que sean fraccionadores, constructores, promotores y demás personas que intervengan en la asesoría y venta al público de inmuebles destinados a casa habitación”: only to providers who are subdividers, builders, promoters and others involved in advising on and selling housing to the public.
So the standard squarely governs developer and new-build sales, and we do not apply it to a resale between two private owners.
What the scope question does not touch is the office itself. The notario’s duties come from the law of the state that appointed them, and NOM-247 describes those duties rather than creating them. So a notario in a private resale is still a public official drafting a deed, not somebody’s advocate. What is less settled is how much of this standard’s consumer protection a private resale carries with it.
When independent advice is worth paying for
Not every purchase needs its own attorney, and we are not going to pretend otherwise. Plenty of straightforward resales close perfectly well with a good notario and a competent agent.
These are the situations where independent advice earns its fee:
Pre-construction and developer sales. You are signing a contract drafted entirely by the other side, often before the thing you are buying exists.
Anything involving a power of attorney. If you are buying or selling without being present, the drafting of the power matters enormously and the consequences of getting it wrong are slow and expensive to fix.
An unusual title history. Ejido land in the chain, an inheritance, a prior dispute, or a property that has changed hands unusually often.
Trust structures beyond the standard fideicomiso. Holding through a company, estate planning intentions, or anything you want to work in both countries.
Any transaction where the two sides want materially different things. A contested boundary, a tenant in place, or a seller who wants terms you are unsure about.
Anything you do not understand. It is the least technical test on this list and the most reliable one.
If you are buying pre-construction
The same standard carries three provisions worth knowing before you sign, and none of them is widely published.
Minimum warranties, and they cannot be signed away. The standard sets minimum warranty periods, longest for structural matters, shorter for waterproofing, and shorter again for other elements, and then adds four words that matter more than the periods themselves: “Estos plazos son irrenunciables.” These periods cannot be waived. Check what your own contract gives you against that.
So a contract offering less than the standard’s periods is offering less than a floor the standard says cannot be given up, which is worth raising in writing before you sign rather than after.
A right to cancel, and the money that goes with it. The standard sets out what an adhesion contract, the form most developer contracts take, must contain as a minimum. One of those required terms is the buyer’s right to cancel within five business days of signing. Check that your own contract carries it, and what it says about the money.
The same required term does not stop at the right to cancel, and this is the part that is almost never quoted. It also obliges the provider to return the amounts the buyer has handed over, less any duly provable operating costs incurred in that period where the parties have stipulated for them, and it requires that repayment within five to fifteen business days of being notified of the cancellation in writing. Notice what that makes of the written notice: it is what starts the clock.
Contracts must be in Spanish, and Spanish governs. At numeral 6 the standard requires it: “Los contratos de adhesión de compraventa de bien inmueble destinado a casa habitación deben estar escritos en idioma español, sin perjuicio de que además puedan ser expresados en otro idioma, en caso de diferencias en el texto o redacción, se estará a lo manifestado en el idioma español.” These contracts must be written in Spanish; they may also be expressed in another language, and where the texts differ, the Spanish is what applies.
So if you are reading your contract in English, the version that governs is one you have not read.
What none of that settles is how a particular contract treats a particular deposit. The standard sets a floor for what the contract must say; your contract is what you are actually signing, and the two are not the same document. If you are paying money at signing, get the deposit treatment in writing, from someone acting for you, before you sign.
The short answer
For a straightforward resale with clear title, a good notario and an agent who knows the market, you may not need your own attorney.
For anything with a contract drafted by the other side, a power of attorney, an unusual title, or a structure you want to hold for decades, the cost of independent advice is small against what it protects.
And know what the notario is there to give you: the documents reviewed, the law complied with, and a valid deed. Where this standard applies, it adds that the advice is owed to each party rather than to one of them. If you want someone whose only duty is to you, that is a separate appointment, and it is your decision to make rather than something the process provides by default.
Our Buyer’s Guide walks through the whole purchase. BHHS Baja also publishes the buyer’s Bill of Rights that this consumer standard requires.
Frequently Asked Questions
Is a notario the same as a lawyer?
No. A notario público is a public official appointed by the state who drafts and authorizes the public deed, verifies the parties and the property, ensures the transaction complies with the law, and registers it. A lawyer you appoint acts for you alone. The two roles are not substitutes.
Does the notario act for me?
No. Where it applies, NOM-247-SE-2021 at numeral 9.2 requires notarios to act impartially and to give the advice appropriate to each of the parties who come before them. Advice owed to each party is not advocacy for one of them, so a buyer who wants someone acting for them alone appoints that person separately.
Can I choose my own notario?
Where the standard applies, numeral 9.1 provides that the consumer has at all times the right to choose and decide the notario. Where there is no mortgage, the same clause allows either party to propose a notario while requiring that the consumer’s freedom to designate one be respected in all cases. So a name arriving from the seller or the agency is normal and permitted; it is a proposal, not the decision. Where the purchase is mortgage financed the position is narrower, and the answer is in the next question.
Can I choose my own notario if I am using a mortgage?
Yes, with a qualification. The standard provides that for mortgage-financed operations the consumer may choose, on the provider’s proposal, a notario on the register kept by the relevant national housing bodies and lending institutions. The choice remains yours; it is made from a register rather than from the whole profession.
Do I need my own attorney to buy in Los Cabos?
There is no legal requirement to appoint one. Whether it is worth it depends on the transaction. Pre-construction, powers of attorney, unusual title histories and non-standard ownership structures are the cases where it most often is.
Who explains the closing costs?
Where it applies, the standard requires notarios to inform and explain in good time how the costs of the deed are made up. If you have been given a single bundled figure, ask for the composition.
What warranties come with a new build?
NOM-247-SE-2021 sets minimum warranty periods, longest for structural matters, shorter for waterproofing, and shorter again for other elements, and states that these periods are irrenunciables, meaning they cannot be waived. Check the periods in your own contract: one offering less is below a floor the standard says cannot be given up.
Can I cancel a pre-construction contract?
The standard lists the minimum terms an adhesion contract must contain, and one of them is the buyer’s right to cancel within five business days of signing. The same term also obliges the provider to return what the buyer has paid, less any duly provable operating costs incurred in that period where the parties have stipulated for them, within five to fifteen business days of written notice of the cancellation. Contracts are negotiated individually, so check the wording in yours, and give any cancellation in writing, because that is what starts the repayment clock.
Does this standard apply to a resale between two private owners?
The standard states its scope as providers who are subdividers, builders, promoters and others involved in advising on and selling housing to the public, so it squarely covers developer and new-build sales. We do not apply it to a resale between two private owners. What does not turn on scope at all is the office itself: a notario’s duties come from the law of the state that appointed them, and this standard describes them rather than creating them.
This reflects our latest information and can change, and a contract may say something different again. Ask us for the current position on a transaction you are considering.
If you take one thing from this page, it is that the notario’s impartiality is the role working correctly rather than a gap in it, and that it leaves nobody acting for you unless you appoint them. An attorney acting for you is the person who can tell you where you actually stand, and we can introduce you to the independent attorneys we work with.