Property Tax Appeals: What Every Chicago Property Owner Should Know
Understanding the system can save you thousands. Here’s the insider knowledge on how property tax appeals work in Cook County.
🏛️ The Four Levels of Appeal
- Cook County Assessor’s Office — First stop. File during the open township window. Informal review process.
- Cook County Board of Review (BOR) — Second level. More formal, most cases settle here.
- PTAB (Property Tax Appeal Board) — State level. Written evidence, administrative hearing.
- Circuit Court of Cook County — Final level. Expensive, usually for big commercial properties.
📅 Cook County Triennial Reassessment
Cook County reassesses property in three-year cycles:
- City of Chicago: 2024
- North Suburbs: 2025
- South Suburbs: 2026
Know your cycle — that’s when your assessment changes and your appeal window opens.
📊 Assessment Levels
- Residential: 10% of fair market value
- Commercial: 25% of fair market value
This gap is why commercial appeals are so lucrative for appeal firms.
🔢 The State Multiplier (Equalization Factor)
The state applies a multiplier (typically 2.9–3.0) to Cook County assessments:
Assessor’s Value × Multiplier = Final Assessed Value
👉 View current Cook County equalization factors
🏠 Comps Are Everything
Successful appeals rely on comparable sales — recent sales of similar properties within a half-mile. Key factors:
- Square footage
- Age of building
- Condition
- Location
Appeal professionals pull these from the PTAX database daily.
👉 Search properties and pull your own comps
👤 Current Assessor: Fritz Kaegi
Elected in 2018 on a reform platform. Raised assessments on commercial properties.
⏰ Deadlines Are Brutal
- Assessor’s Office: Township-specific windows (typically 30 days after notices)
- Board of Review: 30-day window after BOR opens your township
- PTAB: Strict filing requirements and deadlines
Miss the deadline? You’re done until next cycle.
📝 Exemptions vs. Appeals
These are different things:
- Exemptions (Senior Freeze, Homeowner) — Reduce your tax bill directly
- Appeals — Challenge the assessed value of your property
💡 The Revenue-Neutral Reality
“If everyone appeals, nobody wins” — partially true. Lowering your assessment shifts the tax burden to neighbors who don’t appeal. It’s a zero-sum game within each tax district.
🎯 20 Smart Questions to Ask a Property Tax Professional
- What’s your win rate at Assessor vs. Board of Review vs. PTAB?
- How do you pull comps — PTAX, CoStar, or MLS?
- What’s the typical reduction percentage you achieve for residential vs. commercial?
- How has Fritz Kaegi’s administration changed your workflow?
- Do you start at the Assessor’s Office or go straight to BOR?
- What’s your threshold for recommending Circuit Court vs. settling at PTAB?
- How do you handle properties with no good comps — unique buildings, large lots?
- What documentation do you need from property owners to build the strongest case?
- How does the equalization factor affect your appeal strategy?
- What’s the biggest mistake property owners make when appealing on their own?
- How long does a typical appeal take from filing to resolution?
- What’s your fee structure — flat fee, contingency, or percentage of savings?
- Do you handle both residential and commercial appeals, or specialize in one?
- How do you stay current on changes to assessment methodology?
- What happens if we lose at one level — do you automatically appeal to the next?
- Can you appeal a property that was recently purchased at market value?
- How do you handle income-producing properties — do you use the income approach?
- What’s your experience with incentive classes like 6b, 7a, or 8?
- How many appeals does your firm handle per year in Cook County?
- Can you show me examples of successful appeals for properties similar to mine?
🔗 Official Resources — Click to Learn More
Appeal Offices
- Cook County Assessor’s Office — Look up your property, file appeals, check township windows
- Assessor Appeal Portal — File your appeal online during open windows
- Cook County Board of Review — Second-level appeals, hearing schedules
- Illinois Property Tax Appeal Board (PTAB) — State-level appeals, forms, decisions
- Circuit Court — Chancery Division — Final appeals (tax objection cases)
Research Tools
- Property Search — Look up any property’s PIN, assessment, characteristics
- Valuation Reports — See assessment data and comparable sales
- Cook County Clerk — Tax Info — Tax rates, exemptions, payment info
- Cook County Treasurer — Pay taxes, view bills, payment status
Exemptions (Different from Appeals)
- Exemption Overview — All available exemptions explained
- Homeowner Exemption — Up to $10,000 EAV reduction
- Senior Citizen Exemption — Additional reduction for 65+
- Senior Freeze Exemption — Freeze your assessment value
Educational Resources
- Civic Federation — Taxes & Fees — Property tax research, reports, and analysis
- Effective Property Tax Rates Report (PDF) — Civic Federation deep-dive on Cook County rates
- Illinois Property Tax System (PDF) — State overview of how it all works
- PTAB Decisions Database — See how past appeals were decided
Questions about your property taxes? I work with property owners across Chicago and can connect you with the right professionals.
📞 Call Beto: (773) 744-0238
