Augmented reality in construction and architecture projects involves placing a 3D model of a proposed design onto an existing space using mobile devices and 3D models. AR has been used in the video gaming and media entertainment for a much longer period of time to show a real image interacting with one created from computer graphics. Its utilization matured in the AEC industries in the past five years when contractors such as Seattle’s BNBuilders began using it to show clients proposed designs in the context of existing conditions using iPads and other mobile devices on a construction site. Augmented reality has a wealth of design and construction uses beyond visualization, too. It can be used for design analysis to pick out clashes by virtually walking through your completed model. It fits the bill for constructability review by letting the architect and contractor collaborate on changes that have to happen between design and construction due to constructability issues. It can even assist with prefabrication of building components.