Quick Answer
A reassessment notice is a value estimate on one specific PIN, not a tax bill. Condos often split into separate PINs for the unit, parking, and storage, so the first thing you can hand a condo client is a clean look at their exact PIN, class, and exemptions.
For a listing agent, "what are the taxes?" is the question that stalls condo deals. For a buyer's agent, a misread reassessment notice is the surprise that rattles a client mid-closing. Both moments turn on one thing the address can't tell you: the PIN. Get your client to the right PIN early, and you look like the agent who saw it coming.
Why 2026 puts condo clients on the clock
Cook County reassesses on a three-year cycle, one region at a time. **2026 is the South and West suburban triennial** — 17 townships. Notices mail township by township from late April into the summer (Riverside and River Forest go first), so two of your clients a few blocks apart can be on completely different clocks.
Each notice carries its own appeal window — roughly **30 days from the mail date, with a hard last-file date printed on the notice and no extension.** Miss it at the Assessor and the next shot is the Board of Review, which runs its own separate windows later. For you, that timing is a listing conversation: if a condo seller's notice just landed, knowing the window helps you frame the tax picture for buyers instead of letting it become a last-minute objection.
The condo problem: one address, several PINs
A single condo building can hold dozens or hundreds of units, and the addresses look nearly identical across them. Worse:
- The **deeded parking space** may have its own PIN.
- **Storage** can carry a separate PIN or muddy the paper trail.
- A unit number gets typed one way in one county system and another way somewhere else.
If a client reads a notice — or starts an appeal — against the wrong PIN, every comparison after that is built on sand. This is exactly where an agent adds quiet value: helping a client confirm the unit PIN is theirs, that the **property class is correct** (residential condos are Class 2, assessed at 10% of market value, versus 25% for commercial — Cook is the only Illinois county that splits levels this way), and that **exemptions are attached to the right property.** A homeowner or senior exemption is simply a property-level fact that either sits on the right PIN or it doesn't — and one sitting on the wrong PIN is real money in the wrong place.
A section you can paste straight into a client email
Here is language you can forward as-is to any condo client in a reassessment township:
Your reassessment notice is the county's estimate of what your unit is worth — it is not a tax bill, and the bill comes later. One thing condo owners miss: your unit, your deeded parking, and your storage can each have their own PIN (Property Index Number). Before you compare your value to anyone else's, it's worth confirming which PIN the notice covers, that your unit is listed in the right property class, and that your exemptions are attached to the correct PIN. Your appeal window is short — roughly 30 days, with a hard last-file date printed on the notice and no extension — so it's worth checking now rather than later.
That paragraph is fair to send to any owner in the township because it segments on nothing but the property and the calendar — the PIN, the class, the exemption status, and the window on the notice. It says nothing about who the owner is, and it makes no promise about the outcome.
"Someone in my building got a reduction" — manage that expectation
Sellers and buyers both lean on building gossip. The weakest read on a condo's value is "what did my neighbor pay?" A unit in the same building can still be a poor comparison if it differs on floor, view, square footage, condition, parking, renovation level, or the circumstances of its sale. The county may not know a kitchen is original or a unit sits over the alley. If condition is the argument, it has to be documented — photos, contractor estimates, inspection notes, repair records make an abstract number concrete.
For you, this is a credibility moment. When a client says "the unit downstairs got a reduction, so mine will too," you can gently reset it: their neighbor may have had different exemptions, different evidence, or a different assessment history. Their outcome is not a base rate for your client's unit. Pointing that out before a client over-promises themselves is the kind of thing that earns the next referral.
Where Censum House fits
Across Cook County, only about **18 to 32% of parcels are appealed in a typical year**, and over **80% of the parcels that do appeal use counsel.** The Treasurer's 2025 study found businesses appealed at **64%** versus homeowners at **27%** — a gap that shifted roughly **$1.9 billion** of tax burden onto the parcels that did not contest their values. None of that predicts any single client's result. It does say the property-tax picture is a real part of every condo transaction, and the clients who engage tend to engage deliberately, on the right property, before the clock runs out.
**Censum House** is the toolkit that lets you be the agent who brings that picture to the table. You can pull a clean, plain-English look at a client's exact PIN, class, and exemptions and forward it without writing a word of legal or tax advice. And when a condo client could use an exemption or appeal filing, Censum House includes **gift filings that Censum provides and bills directly** — you are never the one who files and never the one who pays for a client's business, so there is no referral-fee tangle. It is intelligence you forward and a filing rail Censum runs, on flat pricing.
**See how Censum House works for your clients** and bring the condo-PIN conversation to your next listing.
FAQ
Is a reassessment notice the same as a tax bill?
No, and this is the first thing to clear up with a client. The notice is the Assessor's estimate of the unit's value. The bill is calculated later: value times the assessment level (10% for residential condos), times the state equalizer (the 2024 final Cook factor was 3.0355), times the local tax rate, minus exemptions. The value is the lever a client can challenge; the other inputs are set elsewhere.
Why might a condo have more than one PIN, and why does it matter to me as the agent?
Condo ownership is often split across separate Property Index Numbers — one for the living unit, and frequently separate PINs for deeded parking and storage. It matters to you because a tax answer pulled against the wrong PIN can derail a deal or embarrass a client mid-closing. Confirming the unit PIN up front is a small step that keeps the tax story clean for both sides.
When does the 2026 appeal window open for South or West suburban condos?
2026 is the South/West suburban triennial covering 17 townships, with notices mailing township by township from late April through summer. Each owner's window — about 30 days — and its hard last-file date are printed on the notice. There is no extension at the Assessor; after that, the Board of Review runs its own separate windows. Knowing the township timing helps you frame the tax picture for a listing instead of being surprised by it.
Can I forward Censum content to my clients without crossing a line?
Yes — that is the point. Censum content describes property-level facts: the PIN, the class, the exemption status, the window on the notice. It segments on the property and the calendar, never on who owns it, and it makes no promise about any outcome. You can paste a section into a client email as-is. Censum is an intelligence and filing-rails vendor, not the county and not a law firm, so nothing you forward is legal or tax advice.
What does Censum actually do, and how does billing work for gift filings?
Censum is an independent property-tax intelligence and filing-rails vendor and Merchant of Record — not the county, not government-affiliated, and not a law firm. Through Censum House, you forward clean PIN and assessment intelligence to your clients. When a client could use an exemption or appeal filing, Censum provides and bills that filing directly on flat pricing. You never file and never pay for a client's business, which keeps the relationship clean on your side.