There are dozens of prefabricated outdoor fireplaces available at home improvement stores today. Unless you have some serious masonry skills, it is not recommended that you attempt to build your fireplace from scratch; mistakes could result in a fire hazard or smoke billowing toward anyone sitting in front of the fireplace. Make sure the fireplace you purchase was made to actually work, not for aesthetic value. Don't forget to consider how the elements will effect the materials used in building your fireplace. For instance, someone living in Seattle will have different weather concerns than someone living in Arizona.
Find a spot in your backyard that is far enough away from your home, as well as any plants, trees, or other flammable structures, so you can safely enjoy your fireplace. Be sure to account for any seating arrangements you had in mind, measure off the area according to the specifications of the fireplace you purchased, and clear away any plants or grass in the area. Now, use your shovel to remove any remaining debris, and drive stakes into the ground where the four corners of your fireplace will be. Use your leveler to make sure each corner is on even ground by following the level line and tying string to each stake. Now, fill your pit with cement or cinder blocks to give it a firm, even foundation.
Read the manufacturer's instructions and specifications before building your fireplace to make sure you have all the items needed for construction. Then, follow the directions to complete your outdoor fireplace. Test the fireplace to see that it is working properly before declaring it finished. Add tiles or other ornaments to the sides, front, base--wherever you like--to make the fireplace uniquely yours.
Finally, install a fireplace screen to eliminate the threat of hot embers popping out the front. Place your firewood inside, light the fire, and stay warm. Your outdoor fireplace will allow you to enjoy your backyard during early spring and late fall months.