Publication
New General Law for the Strengthening and Harmonization of Cadastral and Registry Systems: Cadastral Surveys and Public Property Registries Enter the Digital Age
In summary. On October 23, 2026, the decree enacting the General Law for the Strengthening and Harmonization of Cadastral and Registry Systems (the “Law”) was published in the evening edition of the Official Gazette of the Federation. The Law took effect on October 24, 2026, and requires cadastral and registry authorities throughout the country to adopt digital platforms, standardized procedures, and a Unique Cadastral Code linked to the Real Estate Folio of each property. The new platforms must be operational by January 1, 2027.
1. The Current Problem: Why Mexico Needed This Law
Anyone who has bought, sold, financed, or developed real estate in Mexico is familiar with the system’s difficulties. The very design of the law — common standards, a unique identifier per property, mandatory information sharing, and tools to detect inconsistencies — reflects the main problems it seeks to address:
- A patchwork of 32 public property registries and thousands of cadastral systems.
- Two systems that do not communicate with each other.
- Outdated mapping and records.
- Legal uncertainty and risk of fraud.
- Low property tax collection.
- Uneven technical capabilities.
- Fragmented modernization efforts.
2. Purpose and Scope of the Law
This Law is a matter of public policy, serves the public interest, and is generally applicable throughout the national territory. It implements Article 73, Section XXIX-R, of the Constitution and establishes the framework for coordination among the Federation, the states, and the municipalities to strengthen, modernize, standardize, update, and ensure interoperability of cadastral systems and public property registries.
It applies to authorities with cadastral and registration functions, as well as to any authority that generates, administers, or safeguards information that may be related to these matters. The Federal Law on Administrative Procedure, the National Code of Civil and Family Procedures, the Federal Civil Code, and the National Law to Eliminate Bureaucratic Procedures apply on a supplementary basis.
Its guiding principles are equity, legal certainty, interoperability, and traceability. The latter requires that every entry, modification, or procedure be recorded chronologically in an unalterable and auditable manner.
3. Responsible Authorities
| Authority | Main Functions |
| Ministry of Agrarian, Territorial, and Urban Development (SEDATU) | Manages and allocates federal resources for the Program for the Modernization of Public Property Registries and Cadastres, oversees modernization efforts, and issues guidelines. |
| Agency for Digital Transformation and Telecommunications (the “Agency”) | Issues National Plans and Models for Standardization; develops and manages platforms with cybersecurity mechanisms; trains local authorities; and oversees the adoption of tools and the updating of cadastral mapping. |
| Cadastral Authorities (state and municipal) | They must adopt the Cadastral Standardization Model, the Unique Cadastral Code, the Unique Cadastral and Registry ID, and the Municipal Cadastral Platform; implement Llave MX; and keep their cadastral maps up to date. |
| Registration Authorities (state) | They must adopt the Registry Standardization Model, the Single Cadastral and Registry Certificate, and the Public Property Registry Platform, and implement Llave MX. |
These authorities may coordinate with INEGI to fulfill the purpose of the Law.
4. The Main Tools
National Cadastral Plan and Municipal Cadastral Platform
The National Cadastral Plan guides the modernization of cadastral functions while fully respecting the municipal autonomy provided for in Article 115 of the Constitution. Municipalities may enter into coordination agreements with the states, the Agency, and SEDATU.
The Municipal Cadastral Platform will include, at a minimum, the following modules:
- Base map showing the country’s private, social, and public property.
- Process and service management.
- Property tax management.
- Digital payments.
- Guidance and information.
National Registry Plan and Public Property Registry Platform
The National Registry Plan follows the same approach for registry functions, in coordination with the states. Its platform will include, at a minimum, a module for managing procedures and services and a module for digital payments.
Unique Cadastral Code, Real Estate Folio Number, and Unique Cadastral and Registry Certificate
Cadastral authorities must assign a Unique Cadastral Code to each registered parcel or real estate unit. Both platforms must interoperate to link that code to the Real Estate Folio of each property and generate the Unique Cadastral and Registry Certificate, which will serve as the mechanism linking the cadastral and the registry.
Important Note for Individuals
The assignment of the Unique Cadastral Code is not, in and of itself, conclusive proof of ownership, possession, area, or boundaries, nor does it validate void or irregular acts.
Templates for Standardization
The Cadastral and Registry Standardization Models will establish procedures, requirements, and resolution timelines that are mandatory for all authorities nationwide. The goal is for the same procedure to be carried out in the same manner at any agency.
5. Digital Procedures and Llave MX
Procedures on both platforms will be authenticated using Llave MX, the digital identification mechanism linked to the CURP. The procedures, services, and actions carried out on the platforms will have the same legal effect as those conducted in person, and electronic notifications will have the same validity and evidentiary weight as physical ones.
Cadastral and registry authorities must exchange information to identify and update real estate properties and to detect and correct inconsistencies between cadastral and registry information. This exchange must ensure the protection of personal data, security, and traceability.
6. What Changes for Individuals and Businesses: What to Do and What to Avoid
The law does not impose any express obligations on individuals. Its mandatory provisions are directed at government authorities, and the only penalties it provides for apply to public servants. Even so, property owners, buyers, developers, creditors, and notaries will notice its effects in their day-to-day activities. Here are our recommendations.
What to Do?
- Obtain your Llave MX. It will serve as the authentication mechanism for completing procedures on both platforms.
- Treat electronic notifications as having the same legal validity as physical notifications.
- Verify that the cadastral and registry information for your properties matches. Authorities will be required to exchange information to detect inconsistencies. Differences in area, property boundaries, or owner names may be identified. Correct them before they become an issue during a sale, financing, or an audit by the authorities.
- Allow for additional time for transaction closings in 2027. The transition to the new platforms and procedures could cause delays or changes in requirements, particularly during the first few months of 2027.
- Anticipate increased property tax audits. The cadastral platform will include a property tax management module and updated mapping, which could make it possible to identify properties whose assessed value is underestimated.
What Not to Do?
- Do not consider the Unique Cadastral Code as proof of ownership. The law expressly states that, on its own, it does not constitute full proof of ownership, possession, area, or boundaries, nor does it validate void or irregular acts. Legal review of the title continues to depend on the registry information and the supporting deeds.
- Do not assume that the local procedure you are familiar with will continue to apply. Once the national models are adopted, the requirements and deadlines must conform to those models.
7. Implementation Schedule
| Responsibility | Responsible Party | Deadline |
| Guidelines for the Implementation of National Plans | Agency | 30 business days from the effective date |
| Guidelines for the Unique Cadastral Code and the Unique Cadastral and Registry Certificate | SEDATU and the Agency | 30 business days from the effective date |
| Activation of the Platforms | Agency | 30 business days from the day following the effective date |
| Adoption of the Forms and Platforms | Cadastral and Registry Authorities | No later than December 31, 2026, to begin operations on January 1, 2027, in accordance with the schedule published by the Agency in the Official Gazette of the Federation (DOF) |
| Adaptation of local legislation and budget provisions | State legislatures | 180 days after entry into force |
| Harmonization of regulations | State and municipal governments | 180 business days from the effective date |
Transitory Articles Six and Seven use different terms (“180 days” and “180 business days”), which should be kept in mind when calculating deadlines. The Law does not provide for additional resources: costs will be covered by already authorized budgets. Furthermore, any provisions that conflict with this Law are hereby repealed.
8. Practical Implications
- Developers, real estate investors, financial institutions, and notaries should anticipate changes in the requirements, formats, and processing times for cadastral and registration procedures beginning in 2027.
- The linkage between the Unique Cadastral Code and the Real EstateFolio may reveal discrepancies in area, boundaries, or ownership. We recommend reviewing the relevant properties in each portfolio now.
- The property tax management module and the cartographic update could modify the data used to calculate property taxes.
- It will be necessary to monitor the guidelines issued by the Agency and SEDATU, the schedule published in the Official Gazette of the Federation (DOF), and the local legislation enacted by each state.
About Snell & Wilmer
Founded in 1938, Snell & Wilmer is a full-service business law firm with more than 550 attorneys practicing in 18 locations throughout the United States and in Mexico, including Phoenix and Tucson, Arizona; Los Angeles, Orange County, Palo Alto and San Diego, California; Denver, Colorado; Washington, D.C.; Boise, Idaho; Las Vegas and Reno-Tahoe, Nevada; Albuquerque, New Mexico; Portland, Oregon; Dallas, Texas; Salt Lake City, Utah; Seattle, Washington; and Los Cabos and Mexico City in Mexico. The firm represents clients ranging from large, publicly traded corporations to small businesses, individuals and entrepreneurs. For more information, visit swlaw.com.
