Research in the field of digital technologies in the context of an open relationship with the enveloping society has attracted significant attention. An exploratory study into creating and developing a parametric online model of urban planning documentation is presented. It includes a general urban plan, rules for land use and development, area planning with the possibility to assess the impact of new site development on life in the city and the structure of the urban environment. The research technique included an analysis of the existing methods for introducing new technologies to urban planning and urban studies, which allowed extensive analytical data on the use of the territory and the major technical and economic performance of site development to be obtained. An assessment of existing materials in the city information modelling and the possibility of introducing innovations in urban planning is addressed. We determined the major problems of existing programmes and documents regulating relations between developers and people participating in the city life and creating the urban environment. The research findings include the theory of establishing a platform to regulate the development and related algorithms that utilise parameters embedded in the online model to forecast alternative organisation of a city in terms of urban planning documentation. The relevance of the parametric online model for urban planning documentation lies in its versatility. The transparency of all processes related to establishing an urban environment will provide a new background for designers, management structures and the city as a whole.