Cost & representation
Are property tax appeal services worth it in Cook County?
It depends on what you are paying for. The two things that win a residential appeal — public comparable assessments and a filing on the free county portal — are things a homeowner can do directly. A service is worth it when it saves you the work of finding good comparables and building the packet, but not when it charges a recurring share of savings you could have kept.
The value is in the evidence and the guidance, not in someone filing a form you are allowed to file yourself. That is why ChonkHub charges once for the packet and lets you keep 100%.
Check your address — freeSee your own assessment math before you file. You keep 100%.