https://www.cookcountyassessoril.gov/news/what-know-about-property-assessments-event-flooding-0
What to know about property assessments in the event of flooding | Cook County Assessor's Office
A property owner who experiences severe damage to their home or building as a result of flooding is eligible for an assessment reduction if the damage is...
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https://www.cookcountyassessoril.gov/valuation/proviso-residential-valuations
Proviso: Residential Valuations | Cook County Assessor's Office
cook county assessorprovisoresidentialvaluationsoffice