Backyard offices fall into the area between the office proper and the home office as they embrace the best of both worlds to provide a profitable solution to most freelancers needs.
Backyard offices allow you to cut the commute from home to work without you being too far away from home. Likewise they allow you to work within the parameters of your home in a total office like environment without actually being in the real office.
A backyard office could be a studio, a garden office that has all the amenities needed in a real office such as power supply, telephone and internet connections as well as a washroom.
Finally a backyard office even allows you to run your own business where few employees can work with you while you keep a watch on your home and family. Also it is a fun way to conduct your business outside of the living area of your family.