Universal Design is grounded in an ethical and human-centered principle: spaces should be usable by everyone, regardless of age, physical ability, or health condition, without the need for specialized adaptations that may create a sense of exclusion. This approach is based on a set of key principles, most notably equitable use, which ensures that entrances, pathways, and facilities are accessible and functional for all users—including individuals using wheelchairs—with the same level of efficiency. Universal design also addresses precise technical considerations, such as appropriate heights for electrical outlets, adequate door widths, and the use of tactile flooring to assist visually impaired individuals in navigating spaces safely and independently. Another essential aspect is simple and intuitive design, where wayfinding systems rely on clear, universally recognized symbols rather than complex text, making them accessible to children, elderly users, and non-native speakers. Additionally, universal design considers neurodiversity by incorporating calm, low-stimulation spaces for individuals who are sensitive to noise or intense lighting conditions. From an economic perspective, this design approach enhances property value by appealing to a broader range of users and increasing market inclusivity. In conclusion, universal design emphasizes that disability lies not in the individual, but in the environment. The role of the interior designer is to eliminate physical and psychological barriers, creating inclusive spaces that uphold human dignity and promote social integration.