Check with your local zoning board to get any necessary permits, pay any fees that are required and learn any requirements like the height of the gazebo or the building materials you're allowed to use. You don't want to spend the time and money building the gazebo, only to have to pay a fine or be forced to tear it down.
Decide where in your yard you want to put the gazebo and the style you want to build. Decide on wood versus brick. Decide on how many sides you want your gazebo to have. Four-, five-, six-, and eight-sided gazebos are the most popular.
Go to a website like The Gazebo Factory and order a gazebo kit. These kits will come with pieces pre-cut with all the fasteners you'll need, and the largest sections (such as the roof and floor) pre-assembled. You can expect to spend between $2000 and $3000 (as of 2010) for a six- to eight-foot gazebo.
Build the foundation for the gazebo. You can do this in one of two ways: laying down a concrete slab and putting the gazebo on top of it, or installing piers by digging holes in the ground, filling them with concrete and installing the footers that will support the gazebo.
Separate the pieces of the gazebo kit so that like pieces are grouped together. This will help speed up the assembly process.
Lay the floor panels face down in the assembly area and fit them together. Use a screwdriver or drill to connect the panels by screwing the provided screws into the pre-drilled holes.
Flip the assembled floor unit over and move it into place on the foundation.
If your gazebo kit came with a floor skirt (boards that will be attached to the side of the floor), attach it with the provided screws.
Slide the beams that will act as the roof supports into the spaces along the edge of the gazebo floor, but don't screw them into place yet.
Take one of the wall panels and fit it into place between two of the roof supports, then attach it by screwing the panel into place. Repeat this step until you have installed all the wall panels.
Screw the roof supports into the floor, and check to make sure that all the pieces that you've assembled so far are securely in place.
Slide the roof trusses into place, then attach them at the center of the roof and where they meet the wall panels.
Take one of the roof panels and slide it into place over two of the roof trusses, then screw it into place. Repeat this step until all of the roof panels have been installed.
If your gazebo kit came with screen panels, screw them into place on the walls of the gazebo.