MEXICO CITY – A new Cadastral Law, recently published in the Official Gazette of the Federation (DOF), has officially entered into force, introducing significant structural changes to how real estate and land are registered and managed in Mexico. The reforms aim to provide greater legal certainty, combat property fraud, and prevent illegal land seizures.

The law introduces several key updates designed to modernize the property sector:

• Unique Identifiers: A new “Unique Cadastral Key” (Clave Única Catastral) will be created to identify every property in the country within cadastral records. Furthermore, each piece of land or building will have a “Unique Cadastral and Registry Certificate,” linking cadastral data with the Public Property Registry.
• Digital Transformation: The law mandates the implementation of Municipal Cadastral Platforms and Public Property Registry platforms. These digital hubs will allow owners to manage procedures, receive official notifications, and make electronic payments through “Llave MX.”
• National Data Updates: The legislation requires an update of cadastral information and public property records across the national level.

Will Property Taxes (Predial) Increase?

While the law does not directly modify the tax rates—which remain under the jurisdiction of individual state and local authorities—it could lead to higher tax bills for many owners. This is because the law facilitates the updating of “cadastral values” to align more closely with current market prices. If a property’s official valuation increases to match its market worth, the corresponding “predial” (property tax) will likely rise accordingly. The exact impact will depend on the specific regulations established by the governments of each state and municipality.

Implementation Timeline

The next 30 days will see the Agency for Digital Transformation and Telecommunications issue national guidelines and rules for the creation of the new unique keys.

Following this, the congresses of the 31 states and Mexico City will have 180 days to update their local legislations. Catastral authorities and Public Property Registries are required to adopt the new law by December 31, 2026. The new digital platforms and management models are scheduled to go live on January 1, 2027.