According to the authors, there is a lack of research on applying this concept in smaller cities and areas. The methodology developed in the study presented by the authors allows us to evaluate whether the existing infrastructure in residential complexes can be intervened by changing the function and satisfy the needs of the population of the area (prioritizing thermal comfort, comfort due to vibrations, and economic aspects, among others). The need for datasets to assess mobility accessibility in urban areas was discussed [19]. A comparative analysis of urban accessibility was made for two university campuses and their surrounding urban areas. The authors presented the Urban Mobility Accessibility Assessment Tool (UrMoAC) to assess accessibility measures in each neighborhood using available data. UrMoAC calculates distances and average travel times from block groups to major destinations using different modes of transport, considering the area's morphology. The results obtained by the authors can be used to develop public policies that address the specific accessibility needs of communities. The concept of a 15-minute city, where the basic assumption is that critical urban services and amenities should be accessible within a maximum of 15 min by foot or bicycle from the place of residence, was reviewed in the light of emerging social, physical, and structural changes by 2030, with a focus on European cases [20]. The results provide important additions and recommendations to the urban planning principles of 15-minute cities in terms of proximity-based planning, land use and urban form, urban governance and citizen participation, and inclusive digitization. In this article, the authors have attempted to transfer the idea of 15-minute cities to the scale of a housing estate located outside the city or on its outskirts. This approach aims to eliminate the discomfort of residents caused by the location of essential services far from the settlement (e.g., in the city). Reaching these services is time-consuming and requires travel by car or other means, generating air pollution and harmful gas emissions. In the suburban housing estate under study, there is the possibility of using one building for non-residential purposes. The research problem to be solved is an optimization analysis based on and validated by the results of measurements conducted on a real object. The novelty of this work consists of the practical application of well-known methods of multicriterial analysis based on the analysis of available measurement results carried out by the authors on a real object, aimed at the early forecasting of the qualitative indicator of costs in implementing various utility functions, which is an important stage in preparing offers for potential investors. The research gap is the lack of studies in the literature for smaller 15-minute areas on the scale of isolated housing estates located on the urban fringe. The construction industry both in Poland and globally is currently undergoing rapid changes. Energy-efficient, ecological, climate-neutral, and economical homes are now a priority in design. Prefabricated timber-frame construction meets all these criteria. In Poland, estates on the outskirts of cities built using this fast and ecological technology are very popular. However, developers typically do not include buildings with functions other than residential purposes within these estates. The authors [21] highlighted in their review that research on 15-minute cities primarily focuses on large urban areas, with limited studies addressing settlements on the outskirts or near cities. Their innovative analysis demonstrated how the function of a residential building in such a settlement could be optimized to fulfill a necessary'social' function for the residents. Given the economic criteria that guide developers, the authors assessed the cost prospects of implementing a new utility function to determine the most suitable social function for the building.