This study investigates the integration of self-cleaning protective treatments into 3D-printed building components by applying graphitic carbon nitride (GCN)-based products. GCN is a polymeric material composed primarily of carbon and nitrogen, renowned for its photocatalytic properties, chemical stability, and adaptability. Its ability to degrade organic pollutants, resist chemical wear, and maintain surface cleanliness makes it an interesting candidate for enhancing the performance and durability of building materials. The experimental methodology involved the application of GCN treatments to 3D-printed building elements composed of cement and lime-based mortars. Performance tests were conducted in a controlled rain chamber to evaluate water repellency, and photocatalytic assessments were carried out to determine the material's capacity to deteriorate organic contaminants under light exposure. These tests aimed to assess the material's durability and capacity to maintain functionality under continuous environmental exposure and highlight the potential of GCN materials to extend the lifespan and reduce maintenance needs of 3D-printed architectural components, aligning with sustainable construction objectives.