## 7 Conclusions  
The design of universally accessible housing represents significant progress in guaranteeing the fundamental rights of people with disabilities. However, this research reveals that, in practice, this type of housing does not fully ensure the autonomy and functional mobility it aims to provide. This study successfully developed and validated a virtual reality (VR) tool focused on the functional evaluation of universally accessible housing (UAH), specifically targeting access and circulation areas. The development was based on a structured methodology and the implementation of technologies such as BIM and Unreal Engine, allowing the creation of an immersive environment that realistically simulates the experience of using a home from the perspective of a wheelchair user. The main advantage of this tool lies in its ability to anticipate accessibility issues before physical construction takes place. It enables the simulation of maneuvers, identification of barriers, and evaluation of designs in controlled virtual conditions. This provides a valuable contribution to the housing design process, as it allows critical accessibility parameters to be validated through empirical evidence, such as collisions, heatmaps of time spent in specific areas, and qualitative observations from experts. Applied to a real case study, the tool proved effective in identifying areas with maneuverability and access challenges. Although the dwelling met the dimensional requirements established by Chilean regulations (DS N\({}^{\circ}\)49), the results showed that certain areas--such as the bathroom, kitchen, and small bedroom--had limitations that could affect the autonomy of a person with physical disabilities. This outcome underscores the need to differentiate between limitations inherent to regulatory frameworks and those resulting from specific design decisions. While the dwelling adhered to the minimum dimensional standards mandated by DS No. 49, functional challenges persisted--suggesting that current regulations may not fully capture the complexity of real-world use. In addition, certain layout choices and spatial configurations within the model exacerbated maneuverability constraints, despite meeting prescribed dimensions. These findings reinforce the importance of tools that can bridge the gap between regulatory compliance and actual usability through immersive, user-centered evaluation. This demonstrates that regulatory compliance does not necessarily translate into functional accessibility and highlights the need to incorporate practical evaluations that include the user experience. Experts agreed that the tool provides a more precise and detailed understanding of accessibility conditions, facilitating early design decision-making. Moreover, there is potential to scale its use to different types of disabilities by adjusting the simulation models, paving the way for the personalization of housing design according to users' specific needs. The virtual reality tool presents an effective, replicable, and high-potential solution to support the design and evaluation of accessible housing. Its use allows for the optimization of resources, reduction in redesign costs, and significant improvement in the quality of life for people with disabilities. With additional development time and technical refinement, this technology could become a standard for validating accessibility in inclusive housing projects. Building upon the results obtained, future research must prioritize the direct participation of end-users with disabilities in validation processes. Engaging actual users in the next phase will allow for the collection of richer, subjective feedback, ensuring the tool's real-world applicability and enhancing its practical effectiveness. Furthermore, future studies should aim to adapt the VR tool comprehensively across various types of disabilities--including sensory, cognitive, and psychosocial--through participatory co-design methodologies.