Due diligence handouts outline the most common issues developers face when building in Phoenix. Due diligence is the first step in determining if your project is feasible, and assuring the stages of your project occur in the proper sequence. The information includes, but is not limited to, city, county, state and federal contacts that may have programs or services to assist you. As each project is different, so are the requirements. You are advised to obtain professional assistance if you have questions about developing a project in Phoenix. Phoenix City Hall is located at 200 W. Washington Street, Phoenix, AZ 85003.