Chicago New Construction- Property Taxes

[Mario Rosado]

Hello Bigger Pockets,

I just completed construction on a 2-flat which was built on an empty lot.  The August 1st property tax bill reflects the empty lot.  Is there anything I need to do to inform the county of the new property?  Or just enjoy the low taxes until their next assessment?  If so, is there a mechanism for them to attempt to claw back taxes?  

Thank you!