Buying Off-Plan in Mexico: What You Sign and What You're Owed

Buying off-plan is often appealing because of the lower entry price and the payment plans available during construction, but it carries a different kind of risk than buying a finished home: you sign and pay before you can see, touch or measure what you're going to receive. Understanding which documents you sign, what the developer must guarantee you, and what to check before committing your money is the difference between a successful purchase and years of headaches. In this guide we walk through the entire process, step by step.

What buying off-plan means

Buying off-plan (also called buying in pre-sale, or preventa) means purchasing a house or condo before construction is finished, sometimes even before work has begun. The developer sells based on architectural plans, renderings, a scale model and a description of finishes, not on a property you can walk through. In exchange for the risk of waiting, the entry price is usually lower than that of a finished unit, and staggered payment plans during construction are common.

The critical point is that, throughout the entire pre-sale period, your protection depends almost entirely on what you've signed. If the contract is ambiguous, doesn't require clear guarantees or doesn't address what happens in case of delay, your room to make a claim shrinks considerably once you've already paid the down payment (enganche).

The documents you'll sign

Before the final deed (escritura), an off-plan purchase normally involves signing several documents at different stages. Knowing them helps you avoid confusing a simple reservation with a binding purchase commitment.

• Application or reservation letter (carta de apartado): holds the unit for a short period in exchange for a token amount, without yet being the definitive purchase agreement.
• Purchase agreement (or promise-to-sell agreement): this is the central document. It defines the total price, payment method, unit specifications, estimated delivery date and the contractual penalties (penas convencionales) for breach by either party.
• Technical annexes: unit floor plans, list of finishes and specifications (brand and model of plumbing, flooring, windows and doors, etc.). These must be in writing, not just mentioned verbally in the sales office.
• Trust agreement (fideicomiso) or fund-administration mandate: in many developments, your payments don't go directly to the developer but to a trust that releases the money as construction progresses, which adds an extra layer of control.
• Delivery and acceptance certificate (acta de entrega-recepción): signed at the end, when you inspect the finished unit and accept it (or list outstanding issues) before the deed is executed.
• Public deed (escritura pública): the final transfer of title before a notary public (notario público), once the unit is complete and the contract's conditions have been met.

What the developer must guarantee you

A serious pre-sale contract doesn't just describe the unit: it must also spell out the developer's obligations in the event of delays, changes or defects. These are the points worth demanding in writing before you sign.

If the project will be organized as a condominium, it's worth reading our guide on the certificate of freedom from liens (certificado de libertad de gravamen) and verifying that the land being built on is free of debts before you commit your down payment.

Payment schedule and trust (fideicomiso)

Payment in pre-sale is usually split into an initial down payment, monthly installments during construction, and a final payment or settlement at delivery, which in many cases is covered with a mortgage loan. Before signing, it's important to understand exactly how your money is handled while construction is underway.

1. Confirm whether there is a trust (fideicomiso). An administration trust releases funds to the developer as construction progresses, instead of handing over all the money up front. It isn't mandatory in every project, but it provides greater security.
2. Ask for the exact breakdown of the schedule. The amount and date of each payment, and what happens if you fall behind on an installment.
3. Ask whether the price is fixed or subject to adjustments. Some contracts allow increases for inflation or construction progress; this must be clear from the start.
4. Verify how the mortgage loan is coordinated. If you'll settle with a loan, confirm approval timelines with the bank so they line up with delivery. Our step-by-step mortgage guide explains the entire process.

Red flags before you sign

Not every developer delivers what they promise in the sales office. These warning signs should make you pause before paying any advance.

Researching the developer before committing your money is just as important as reviewing the contract. If you have questions about common fraud practices in the sector, check out our article on common real-estate frauds in Mexico.

What to check at final handover

When construction ends, the moment of the delivery and acceptance certificate (acta de entrega-recepción) arrives. This is your last chance to point out defects or pending items before formally accepting the unit, so it pays to go prepared.

• Compare the actual square meters and layout against the plans signed in the contract.
• Check that the finishes match what was specified (flooring, windows and doors, kitchen, bathrooms).
• Test the electrical, plumbing and gas installations before signing the handover, not after.
• Write down any pending item or defect and ask for a committed deadline for fixing it.
• Confirm that the promised common amenities are finished or have a firm date.
• Don't sign the final deed until the relevant pending items are resolved or documented with a committed date.

Frequently asked questions

Is it safe to buy off-plan in Mexico?

It can be, if the developer has a verifiable track record, the contract is clear about dates, penalties and warranties, and ideally the funds are handled through a trust (fideicomiso). The risk increases when the contract is ambiguous or the developer has no verifiable history.

What happens if the developer delivers late?

It depends on what your contract says. A good pre-sale contract includes contractual penalties in the buyer's favor for each period of delay beyond the agreed grace period. If the contract doesn't provide for this, your room to make a claim is much more limited.

Can I cancel the purchase after signing the contract?

It's generally possible, but it usually involves financial penalties that vary depending on what was agreed and the stage you're at. Review the termination clause before signing so you know what percentage of the money paid you could recover.

Do I need an attorney to review the pre-sale contract?

It's highly recommended, especially if the amount is large or the project is from a developer you don't know. An attorney or notary public (notario público) can identify unbalanced clauses or ambiguities that aren't explained in the same detail in the sales office.