How do I file a joint appeal (for condos or co-ops) and what documents are needed?

Condominium and co op associations may file joint appeals for multiple units.

How it works:

Filed by an authorized association representative
Covers multiple units within the same building
Focuses on valuation uniformity across units

Required documentation may include:

Unit list with Property Index Numbers
Board authorization
Recent sales data within the building
Assessment summary reports

Joint appeals must still be filed during the township’s open window. Check deadlines here:

Cook County Property Tax Appeal Deadlines page..

Because joint appeals involve multiple owners and valuation modeling, professional coordination is important. Cook County Tax Appeals assists condo and co op associations with full preparation and filing.

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Find Your Township’s Cook County Property Tax Appeal Deadline Check Your Tax Evaluation