This work presents an innovative agent based platform specially designed to simulate human activity at any urban area environment (buildings, apartments, houses, offices, gardens, parks, small residential areas, etc.) and manage data from sensors. The platform uses 3D models of the environment to perform accurate simulations, while simultaneously showing relevant and high quality data. This chapter also presents the platform case studies that have been conducted and that demonstrates their technical and conceptual validity, where, by merging data obtained by multiple sensors with information of the subject’s activities and simulation data, the platform can extract and store information on typical situations in a real environment, and also observe possible technological or architectural barriers for people with disabilities.