Automatic building change detection required for metropolitan and urban planning , industrial city planning, road and highway planning, unauthorized construction detecting, stopping any new construction on risky or highly dense areas, planning for homeland security etc. This research proposal aims for automatic building change detection and 3D map generation using multispectral imagery and 3- dimentional height data. The goal for this research proposal is to detect building changes with precise geometric accuracy and use the detected building changes data to generate 3D building map. High resolution aerial and satellite imagery and highly dense height data from LIDAR can detect building change and can generate an accurate up-to-date 3D building map.