Ramón de Carranza first assumed the mayoralty of Cádiz in 1927, during Primo de Rivera's Dictatorship. His appointment followed a series of conflicts between the then-mayor, Agustín Blázquez, and the civil governor, Luis Lossada, which led to their dismissal by order of the Prime Minister. The task of finding a successor fell to the Cádiz lawyer José María Pemán y Pemartín, who proposed Carranza, a 64-year-old former senator, who had been out of politics and dedicated to his fishing businesses.

Carranza, born in Ferrol in 1863, had a brilliant military career as a rear admiral in the Navy, earning the Cruz Laureada during the Cuban War. After his naval service, he became involved in politics at the urging of José Moreno de Mora, becoming a senator for Cádiz on several occasions. His acceptance of the mayoralty was conditional on Prime Minister Primo de Rivera's commitment to support development plans for Cádiz and his freedom to form his own governing team.

Before his appointment, Carranza secured the central government's backing for the city, publishing Primo de Rivera's letters of support in the Diario de Cádiz. For his team, he initially proposed José Luis Lacave as first deputy mayor and Juan García de Sola as second. Although Lacave declined the political position, García de Sola accepted a secondary role. Ultimately, Carranza's government team included figures such as Álvaro Picardo, Luis Beltrami, and José León de Carranza, among others.

In early 1930, with Primo de Rivera's resignation and General Dámaso Berenguer's ascent, all mayors were ordered to step down. Despite his farewell speech, in which Carranza emphasized the apolitical nature of his administration and his pursuit of Cádiz's well-being, the citizenry showed strong support for his continuation. 25,000 signatures from residents of Cádiz were collected requesting his reinstatement, which were presented in Madrid by a commission of industrialists and workers.

Given this display of popular support, the Minister of the Interior, Marzo, acknowledged the will of the people of Cádiz, and by Royal Order, Ramón de Carranza Fernández de la Reguera was appointed mayor of Cádiz for a second time on February 26, 1930. His subsequent terms would occur after the municipal elections of 1931, which led to the proclamation of the Second Republic, and finally in 1936, at the beginning of the Civil War, solidifying his unique legacy in local politics.