This study examines the Yamuna Expressway's impact on residential real estate values using a mixed-methods approach, combining resident and buyer surveys, real estate professional interviews, and site visits. Analysis reveals a strong positive correlation between expressway proximity and property appreciation, attributed to enhanced connectivity to Greater Noida, Delhi, and Agra, improved access to employment, and stimulated infrastructure development. However, impact varies across micromarkets. Premium sectors (18, 19, 25) experience higher appreciation than Sector 150, where growth is moderated by green space and eco-friendly branding. Influential factors also include infrastructure availability, property characteristics, market cycles, and government policies. Buyer preferences for connectivity and accessibility underscore the expressway's role in shaping demand. This study provides nuanced insights for stakeholders, highlighting the complex relationship between infrastructure, micromarket dynamics, and buyer behavior.