[header] How to make a fence gate [title] Measure the desired width of your gate. [step] If you do not have an existing fence to attach the gate to, you will need to build one, as fence posts are necessary for installing a fence. [title] Mark the spot where the gate fence posts will go into the ground. 
[step] If you do not already have fence posts in place, you will need posts in order to install a gate. Make small indentations in the ground with your trowel.