After deciding to build a patio, the next step in the process is to decide where the patio should go. Drawing a patio site plan will allow you to first map out your desired location and keep a record of this location for future purposes.
Assess the lay of the land in your yard. Although it is possible to level uneven ground, it is cheaper and easier to choose a relatively flat area for your patio. Other things to consider are how close you want it to your house, your driveway or the boundaries of your yard. If any of these pose a potential problem, you will have fewer options of where to place the patio.
Decide on a rough estimate of how large you will want your patio to be. This does not need to be exact or precise, but it is helpful when determining the best placement of the patio.
Obtain a grid paper and sketch onto it the major existing boundaries of your yard (property lines, your house, major trees or walls that you don't want removed). Once these obstacles have been sketched in, you may start deciding where you want your patio.
Look for an open area on your sketch, large enough to accommodate your desired patio size. You are looking to find an open area of appropriate size that also agrees with your personal opinion of where you would like the patio to be. Once you have a space that suits both desires, you may continue.
Sketch in the patio site on your plan. If you wish, you may now decide on precise measurements (this is helpful, since the grid paper is usually to a certain scale).