Condo and co-op associations can file a joint appeal covering multiple units, filed by an authorized representative and focused on valuation uniformity. Documents may include a unit list with PINs, board authorization, recent in-building sales, and assessment summaries. It must be filed during the township's open window.
Back to all FAQs
How do I file a joint appeal (for condos or co-ops) and what documents are needed?
Are You Overpaying?
Most Cook County homeowners are over-assessed. Check your potential savings in under a minute.
WHY CHOOSE US?
70% higher success rate than average attorney appeal
Instant AI-powered property analysis
Licensed Illinois tax attorneys & CPAs
3-tier escalation: Assessor → BOR → PTAB
Risk-Free Service
$0 Upfront cost — you only pay if we winOur fee is just 25% of the first year's savings. No hidden fees, no surprises.
View Pricing DetailsGet In Touch
Phone Numbers
Text / SMS