The objective of this research is to conserve the historic center of the city of Guanajuato. In it there are problems of pedestrian accessibility. This study is to make it known that it has an undeniable heritage. Currently there is a relationship between the individual and the functional limitations of the environment. The focus of this research was aimed at strengthening and generating sustainable projects without altering the integrity of the heritage property and without using means that condition the conservation of the environment. Accessibility must be considered in the urban planning of every heritage city, restoration and conservation of public space and buildings, without altering their architecture and the natural environment. Guanajuato is characterized for being a changing city, for being dynamic, interacting between its streets and alleys. That is why any failed intervention in this city is due to the fact that the pedestrian is not considered as the main protagonist. It is here where several aspects have to be considered to be incorporated in the cultural assets without affecting the real estate that embellishes the capital city.