Intelligent building systems represent the next evolution of architecture, integrating IoT sensors, automated controls, and data-driven platforms to create responsive, energy-efficient, and user-centric environments. By connecting HVAC, lighting, security, water, and occupancy systems through real-time data, smart buildings can reduce energy consumption by 20–40%, enhance comfort through personalized environmental settings, and prevent failures through predictive maintenance. While challenges such as cybersecurity, system integration, and vendor coordination remain, scalable solutions and wireless retrofit technologies enable both new and existing buildings to embrace smart automation. India’s Smart World Trade Center in Navi Mumbai exemplifies this potential, operating with over 10,000 IoT sensors to monitor air quality, energy, water, and occupancy, achieving 30% energy savings and LEED Platinum certification. As organizations adopt intelligent building systems, the most effective strategy is to begin with high-impact applications—such as energy management or space optimization—and expand as measurable ROI and operational readiness grow.