The Alvalde Neighborhood constrution district between 1945 and 1970 (25 years) generated an important architectural and urban heritage, a testimony of the transition between the New State architecture and the architecture influenced by the Modern Movement. This transition period coincided with the professional and social affirmation of landscape architecture in Portugal. This combination resulted in multiple typologically different urban spaces, making Alvalde Neighborhood  a case study, par excellence, for the investigation of the interdisciplinary relationship between architecture and landscape architecture in Portugal.   Thus, the research aims to complement the architectural, urban and social knowledge of the neighborhood, interpreting its Green Structure as the result of the social and professional dynamics that guided the interdisciplinary relationship between the two arts, within the scope of liberal professional practice and service of the cause which will have been decisive for the specificity of its urban space in the context of the city.