***S***Special promotion: 3 months free base rent with a 3 year lease and 6 months free base rent with a 5 year lease. *** Prime Riverfront Commercial Condo for Sale or Lease - 1, 000 SF Endcap- Downtown Port Byron, IL. Unbeatable river views! Don't miss this unique opportunity to lease or buy a Class "a" commercial office condo in the heart of scenic downtown Port Byron, IL. Situated directly on the Mississippi River, this well appointed space was formerly the office of a Financial Advisor and is ideally suited for any professional or other office use.