Design solutions for methods of future spatial development, contained in planning documents, are presented as 2D graphics with supplementary descriptions. Lack of specialist knowledge and in-sufficient spatial imagination in various readers of such documents results in problems with ab-sorbing the document contents, both in their graphical and textual parts. In consequence, objects can be constructed that disrupt the spatial order, although with no legal violation. This problem can be solved by applying augmented reality (AR) in spatial planning. This paper presents the capabilities of a method for visualizing different variants of spatial development, with buildings as examples. A building plot with its surrounding area, covered by a local spatial development plan, was used as a model. By modelling future land development with AR technology, it was possible to demonstrate a lack of precision of the plan and its potential impact on the method of spatial development, with resulting deterioration of the spatial order. The utility of 3D visualization of a plan to an average reader was also presented, which can be used at the stage of preparing planning documents (community participation, adopting the plan) and at the stage of passing by-laws (councilors) and when it is in force (investors’ decisions).