In order to ensure that a Website available is easily accessible to as many people as possible, evaluation processes are carried out on Web accessibility, allowing the identification of issues in the construction of such sites and barriers that may limit access to information. However, making these evaluations can become a time consuming task and produce incomplete results; besides, they are based on general guidelines that do not take into account the particularities of each type of disability. This paper proposes a methodology for heuristic evaluation of web accessibility oriented to types of disabilities, consisting of five stages that allow establishing the level of accessibility and specific problems of a website.