Through the establishment of rules applied to the data of postal addresses, the cadastral reference, type and use of the property, surface, participation, age and year and type of reform of the property, as well as surface of the property and total surface of the property with housing use and total surface of the rest of the property of the property are assigned.

The postal address data are enriched with the information contained in the database of the General Directorate of the Cadastre, such as the number of residential properties, total properties with other uses, number of floors, maximum height of the building, number of basements and parking spaces, etc. These data are provided both at building and property level.

(*)Source of data obtained from the General Directorate of Cadastre, Ministry of Economy and Finance of the Kingdom of Spain; Cadastre of Alava (Provincial Council of Alava); Local Tax Management Service of the Department for Taxation and Finance (Provincial Council of Gipuzkoa); Cadastre of Bizkaia (Provincial Council of Bizkaia); Cadastre of Navarre (Tax Office of Navarre).