At present, surely one of the most significant challenges that must be addressed by the planning is the achievement of sustainable territorial and urban development. This means that it has to continue to contribute to the progress but not forget the demands of sustainability in its three aspects: economic, social and environmental. So, we start with the concept of sustainable development but linked to planning that demands attention in its regulation, among other things, accessibility, and social cohesion and integration because they have imposed, at national level, the.new revised text of the Land law and Urban Renewal, and in the region of Castilla y Leon by the relevant reform carried out in 2014 in the Planning Act 1999.