After few years, I believe we will witness an increase in smarts within a building. Better lighting management, energy efficiency, and proper airconditioning control are all benefits of more intelligent buildings. We might start adopting higher-performance windows to reduce the amount of solar load that enters the building. Hundreds of IoT gadgets have been built expressly for homes to make them brighter and more excellent in the last few years. One of the most interesting construction technologies to keep an eye on. Voice assistants like Amazon Alexa and Google Home can play music, answer questions, make calls, and control almost all your home's lighting and appliances. Because these devices have artificial intelligence, they will continue to improve, learn more about our requirements, and link to other things at home. This study reviews and summarizes a number of publications and emphasizes the importance of smart buildings.