Considering existing buildings and facilities on potential farmland is an important step during the process of site evaluation. Depending on what kind of farm you want to have, your plan will most likely require infrastructure of some sort, and it is good to take into account what is already there, and what structures you may or may not be able to build.

Buildings and Facilities
This Cornell resource offers good information for beginning farmers who want to assess existing site infrastructure such as buildings and facilities, fencing, and hoop houses.