The design of electric power transmission lines analyzes multiple variables, but few are related to the property aspect. Consequently, this project proposes a spatial methodology that allows determining optimal routes with a property approach in power transmission. For this purpose, some variables were identified by classifying them within the three main components of the cadastre: physical, economic and legal; subsequently, their relevance was validated through expert criteria and then a non-parametric test called Sign Test was applied in order to establish which variables reached an important score and which, on the contrary, were not statistically significant. From the analysis of the variables, two scenarios emerged for the design of the spatial model, the first included only the variables validated with the sign test, a total of eight (8), and the second scenario considered the thirteen (13) variables initially proposed. Two cost surfaces were obtained: Cost Map 1 and Cost Map 2 with their corresponding optimal routes calculated Optimal Route 1 and Optimal Route 2, through quantitative analysis it was deduced that the first cost map and Optimal Route 1 yielded better results and therefore, they were chosen to make comparisons with the existing line of the pilot project used, concluding that the proposed methodology is efficient and very useful for ISA INTERCOLOMBIA S.A. E.S.P. in early stages of electric power transmission projects.