Mexico Is Changing Real Estate Recording. Here's What Changes in 2027.
On October 23, 2026, Mexico published a law that changes how every home, condo, and piece of land in the country is recorded. The Ley General para el Fortalecimiento y Armonización Catastral y Registral — the law to strengthen and standardize the country's property records — took effect the next day, and the new systems are scheduled to start operating on January 1, 2027. If you own property here, or you're thinking about buying, here's what it means — and what it doesn't.
Two sets of books
Today, a property in Mexico lives in two separate systems. The catastro, or cadastre, records the physical facts: where the property is, how big it is, what it looks like, and the information used to calculate tax. The Registro Público de la Propiedad, the Public Property Registry, records the legal side: who owns it, and what other registered rights exist on it. The two systems don't always share information well, and when they disagree, you get paperwork delays, trouble verifying a record, and, in the worst cases, openings for fraud.
What changes
The new law connects them, and standardizes how they're kept across the country. Three things matter most. First, every property in the cadastral register gets a Clave Única Catastral — one unique identification number, a bit like a CURP for your condo — designed to link its tax record to its registry record. Second, a new Cédula Única Catastral y Registral brings the information from both systems together into one combined record. Third, new digital platforms will handle property applications, electronic payments, and official notifications, using Llave MX, the federal government's digital ID system. The municipal platform will even include a module for managing predial, the annual property tax.
Authorities have until December 31, 2026 to adopt the new models and platforms, and operations are scheduled to begin January 1, 2027 — subject to an implementation calendar and what each state and municipality can technically handle. State legislatures then have 180 days to adjust their laws, and state and municipal authorities have 180 business days to harmonize their regulations. In practice, the rollout will be gradual, and the pace will vary by place.
What the new number is not
One thing worth knowing clearly: the new identification number is not, by itself, proof of ownership, possession, size, or boundaries. The law says so explicitly, in Article 28. So the careful title work that a notario does before a purchase still matters exactly as much as it did before. The new system should make records easier to check, not replace the checking.
Will your property taxes go up?
This is the question everyone asks, and the answer has two parts. The law does not create a new property tax, does not order higher rates, and does not require an automatic revaluation of every property in the country. Your local authority's powers over predial are unchanged. But — and this is the part that has some critics nicknaming it the “predialazo” law — updated records can turn up differences between what's on file and what's actually there. If a difference leads to a revised valuation under local rules, that property's annual predial could go up. The law itself doesn't raise anyone's bill. A corrected record might, for an individual property.
Do you need to do anything?
No — not on the basis of this law. It does not require homeowners to re-register their property or get a new deed. If something about your property's records needs correcting, that's a conversation with your notario, not a new obligation the law drops on every owner.
What it means in Puerto Vallarta
For buyers and owners here, the direction is good news with a patience warning attached. Over time, one linked record for each property should mean fewer mismatches between the tax file and the registry file — the kind of mismatch that slows a closing down while everyone sorts out which record is right. But this is a federal framework that Jalisco and Puerto Vallarta have to implement, and the law itself gives them months to do it. If you're buying, the practical step hasn't changed: ask your notario whether the property's cadastral record matches its registry record. That's exactly the gap the new system is built to close, and until it's fully running, checking it is still the smart move.
None of this is legal advice for your property — for that, your notario is the right person to ask.
If you own a place here, or you're thinking about buying one, and you want to talk through what this means for your property specifically, I'd be glad to — the numbers, the neighbourhoods, and the paperwork, in plain language.
Your Life, Elevated
Nik Valcic
MexHome Real Estate, Puerto Vallarta
+52 322 274 7775 (Mexico) | +1 360 861 0715 (US / Canada)
Based on Expat Insider Mexico, “Mexico's New Property Law: What Changes in 2027?” (October 27, 2026). The law's publication in the Diario Oficial de la Federación on October 23, 2026, and its entry into force on October 24, 2026, are confirmed in Mexican press coverage (La Crónica de Hoy, El Imparcial, IDC).
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