It is proposed the obligation of a City Council to exhibit before any person an administrative file of works and, if so, what documentation of the file must be exhibited before third parties. The right to data protection and the right of access to environmental documentation of public administrations converge. The transfer of data does not require the consent of the affected party because a norm with the rank of a law legitimizes the access of every person to information related to the environment that is in the hands of public authorities, without it being inferred, in this specific case, the existence of sensitive data that requires confidentiality.