Technical-economic feasibility study for wastewater reuse in the irrigation of Quinta do Lago, Pinheiros Altos and São Lourenço Golf Courses and Infraquinta and Dunas Douradas garden spaces, at Loulé municipality, with an irrigation area of 215 ha. During the work development the water needs and annual availability per origin were analyzed and quantified, with different solutions being identified, based on a multicriteria analysis. The project also included the definition of transportation infrastructures and treatment to be installed, with the respective cost quantification per each scenario.