You've made it to attorney review on a Lincoln Park two-flat conversion, or maybe a Streeterville high-rise, and the resale package lands in your inbox. Somewhere in the stack is a line that says a reserve study is on file. You exhale. That box being checked feels like the all-clear, the thing that separates a safe purchase from the horror story a coworker told you about a $20,000 elevator bill.
Here's what that checkbox does not tell you: whether the board actually funds its own study's recommendations, or just keeps it in a drawer. And that gap, between a study existing and a study being followed, is where most Chicago special assessments are born.
A Reserve Study on File Isn't the Same as a Reserve Study Being Used
A reserve study is a physical and financial inventory: someone walks the roof, the elevators, the facade, the boiler, and estimates what each component has left in useful life and what it will cost to replace. The output is a recommended annual contribution. What happens next is entirely up to the board, and Illinois law does not require them to follow it.
One documented case from a suburban Chicago association shows how this plays out. A 120-unit condo board tracked reserves on a spreadsheet for over a decade, updating estimates by hand each year with no formal study behind them. When a $180,000 roof replacement came due, the board finally commissioned a real study and found the fund was only 35% funded, more than $100,000 short. The special assessment that followed was unavoidable. The same pattern shows up outside the city too: a 90-unit Naperville-area HOA discovered a $150,000 parking lot needed full replacement the same year its roof started leaking, with no reserve study on record. The board passed a $4,500 per-unit assessment within 60 days, and three owners threatened legal action.
The lesson isn't "always demand a reserve study exists." It's this: ask for the current budget alongside the study and compare the two line by line. A well-run building typically directs 20 to 30 percent of total assessments into reserves. If the study recommends a certain annual contribution and the adopted budget falls well short of it, the study is decoration. If a study shows a building is only 20 percent funded against its own projected needs, a special assessment is close to a certainty, regardless of what the cover page says.
The Rule Everyone Calls a Buyer Protection Actually Defaults to the Board
Illinois condo law does put a ceiling on how much a board can raise total assessments in a single year without triggering owner input. Under Section 18(a)(8) of the Illinois Condominium Property Act, if total assessments, including a new special assessment, would exceed 115% of the prior year's total, owners get a say. It sounds like a hard cap. It isn't.
Here's the mechanism in practice: owners holding at least 20% of the association's votes have to submit a written petition within 21 days of the board's decision. That triggers a meeting the board must hold within 30 days. At that meeting, the assessment only gets rejected if a majority of all unit owners in the building vote against it, not just a majority of whoever shows up. If the 20% threshold isn't hit, or the vote doesn't clear that bar, the assessment is automatically ratified. The rule isn't a brake pedal. It's a narrow, self-organizing window that most buildings never use, because getting 20% of owners to file paperwork within three weeks of a board vote is harder than it sounds.
For a buyer, this matters because it reframes what "protection" means. The rule doesn't stop a large assessment from happening. It gives a motivated bloc of existing owners a chance to stop it, and only if they move fast. As a prospective buyer reading board minutes from the past 12 to 18 months, you're really checking whether the ownership base in this building is the type that organizes, or the type that lets things ratify by default.
The Law Everyone Assumes Is Coming Isn't Here Yet
A lot of the guidance circulating online treats a mandatory reserve study as something Illinois is about to require, any year now. As of mid-2026, that still isn't true. The current law only requires condo boards to budget for "reasonable reserves" under Section 9 of the Condominium Property Act, without a formal study, a funding percentage, or a fixed schedule attached to that word "reasonable."
There have been two real attempts to change this. An earlier bill, HB 220, passed the Illinois House in 2024 and would have required associations without a reserve study in the prior five years to get one by January 1, 2026. It didn't become law. Its successor, HB 2563 and its companion SB 1703, would require a reserve study every five years for common interest communities, mirroring rules already in place in states like California, Nevada, and Washington. According to a legislative update published in June 2026, that bill did not advance during the 2025-2026 session, though the same update notes lawmakers are likely to bring it back in a future session.
The practical takeaway: don't shop for a Chicago condo assuming a state mandate will backstop a weak building. Right now, the only enforcement mechanism is your own due diligence and, for condominium instruments that don't already set a required reserve amount, a two-thirds owner vote can waive even the existing "reasonable reserves" requirement, provided that waiver is disclosed to prospective purchasers.
What This Actually Costs, Converted to a Monthly Number
The average Chicago condo HOA fee runs around $425 a month as of 2026, and that figure has been climbing roughly 6% a year, which puts a fee at that level on track to exceed $761 a month within a decade if the trend holds. Layer on the average special assessment tracked across Chicago condos in 2026, which lands around $14,000, and the sticker-price comparison most buyers make between a condo and a single-family home starts to look incomplete.
Here's a rule of thumb worth carrying into any building comparison: convert a proposed special assessment into a monthly figure the same way you'd think about a car payment. A $3,000 assessment paid over 12 installments adds about $250 a month to your carrying cost. If it's due as a lump sum at closing, you need that cash on hand or a seller credit built into your contract. Add that number to your mortgage payment, property tax divided by 12, insurance divided by 12, and your regular HOA dues, and you have the real monthly cost of owning that specific unit, not the one on the listing sheet.
Two Chicago-specific pressures compound this further. Recent Cook County reassessments have pushed some condo owners' tax bills up 20 to 40 percent, arriving independently of anything the association does. And Chicago's facade inspection requirements can force mandatory repair work on older masonry or curtain-wall buildings, the kind of mandatory item that shows up as a special assessment with little warning, particularly in lakefront neighborhoods like Edgewater where wind-driven rain and corrosion add extra stress to building envelopes.
The Documents That Actually Answer the Question
Before you waive any attorney review contingency, ask for these, and read them in this order:
- Current budget plus the prior two years. Compare the reserve line item to what the study recommends.
- Reserve study, with its date. Anything older than five years is effectively no study at all.
- Board meeting minutes, 12 to 24 months back. This is where you find out if owners are organizing, or complaining about the same leaking roof every quarter with no action taken.
- Section 22.1 disclosure. Illinois law requires sellers to provide this packet, covering the association's financials, reserve balances, and any pending or approved special assessments. Ask for it during attorney review, not after you've waived contingencies.
- Estoppel letter or resale certificate. This confirms the specific unit's assessment status and whether anything is owed at closing.
- Insurance declarations page. Note the master policy deductible, since a high deductible on an older building often signals an insurer that's already pricing in risk.
A condo's sticker price is a down payment on the building's maintenance history, not a substitute for reading it.
A Few Questions Worth Settling Before You Offer
Is a reserve study legally required in Illinois? Not yet, as of August 2026. Boards must budget for reasonable reserves, but no statute forces a formal study on a fixed schedule. Two attempts at changing that, HB 220 in 2024 and HB 2563/SB 1703 in the current session, have each stalled.
What does the Section 22.1 disclosure actually include? The association's financial picture: budget, reserve balances, special assessment history, and any pending litigation. Illinois law requires sellers to provide it, and you should have it in hand before you waive contingencies, not scramble to review it after.
Can I ask the seller to cover a pending special assessment? This is a normal negotiation point. Buyers routinely ask sellers to pay an approved assessment at closing, split the cost, or fund an escrow holdback. Whether that's available depends on your contract language and whether the assessment was approved before or after your offer, which is exactly the kind of detail your attorney should confirm before you remove contingencies.
Reading a reserve study or a board's minutes isn't complicated once you know what to look for, but it does take someone comparing the numbers against each other rather than checking a single box. That's the same instinct that comes from years spent reconciling budgets against what actually got spent, which is where Nina Trivedi starts every Chicago condo conversation. If you're weighing a building's paperwork against its price, reach out and start the conversation.
