This research study investigates the structural evaluation and reinforcement of the San José de Chimbo Church in Ecuador. This historical architectural monument suffered significant damage during the September 2018 earthquake. An innovative reinforcement method employing injected mortar is proposed to preserve its historical significance. Exhaustive inspections were conducted to comprehensively assess the damages suffered by the church, yielding precise data regarding the deformations and cracks in its structure. Based on the results of the structural evaluation, the use of injected mortar was proposed as a reinforcement technique. This approach offers several advantages, including its ease of application and adaptability to existing forms and cracks. Injected mortar involves introducing a high-strength cementitious material into the damaged areas, effectively strengthening, and restoring the structure without compromising its historical value.Furthermore, laboratory tests were carried out to assess the mechanical strength and properties of the injected mortar, ensuring its suitability and effectiveness in the Church's rehabilitation. Additional factors such as durability, compatibility with existing materials, and resistance to future seismic events were considered. The proposed reinforcement utilizing injected mortar aims to provide a sustainable and efficient solution for preserving the San José de Chimbó Church, ensuring its structural stability and historical value for future generations. This approach can be applied in other rehabilitation projects concerning heritage structures affected by earthquakes, offering a viable and respectful alternative that honors history and architecture. In summary, this research work introduces an innovative proposal for reinforcement through injected mortar to preserve the historical structure of the San José de Chimbó Church. The outcomes obtained and insights gained have significant implications within engineering rehabilitation and architectural heritage preservation, demonstrating how technical innovation and a respect for historical value can be combined in structural reinforcement projects.