While it is technically possible to erect your hardtop gazebo without professional help, it is a fairly big job. It will require one or two additional people to help you, a range of tools, and some DIY know-how, especially if you plan to cement the legs in place. Prepare for some heavy lifting, and expect it to take between five and 12 hours, depending on the complexity of the gazebo and your level of construction knowledge. A large percentage of buyers, however, choose to hire a professional to assemble their hardtop gazebo to ensure the job’s done correctly and avoid any hassle.