State Requirements

Illinois Condo Reserve Requirements

Illinois has required condominium associations to fund "reasonable reserves" since 1990 — and it spells out exactly what factors boards must weigh. But it stops short of requiring a reserve study, creating a familiar gap: a duty to fund adequately without a mandated tool to measure adequacy. There's also pending legislation that could change this. Here's where Illinois stands.

General information, not legal advice — Illinois law is active in this area; confirm current requirements with Illinois community-association counsel.

The Section 9 Reserve Requirement

The Illinois Condominium Property Act (765 ILCS 605), specifically Section 9, is the heart of condo reserve law. Its core rule: all budgets adopted by a board of managers on or after July 1, 1990 must provide for reasonable reserves for capital expenditures and deferred maintenance for repair or replacement of the common elements.

What makes Illinois distinctive is that the statute names the five factors a board must consider when setting reserve levels:

1. The repair and replacement cost of the property
2. The estimated useful life of the property
3. The current and anticipated return on reserve investments
4. Any independent professional reserve study the association may have
5. The financial impact on unit owners and the market value of the units

Notice factor #4: the law explicitly contemplates a reserve study as an input — without requiring one. A board that has a reserve study and documents how it weighed all five factors has built exactly the record Section 9 contemplates. A board that eyeballed a number has satisfied the letter of "consider these factors" far more weakly.

No Study Mandate — But Strong Reasons to Have One

As of now, Illinois does not require condos or HOAs to perform a reserve study on a set schedule. The law requires funding reasonable reserves and considering the five factors; the study itself remains best practice rather than statutory mandate.

But Illinois case law gives the requirement real teeth. Courts have held that what constitutes reasonable reserve budgeting is a question of fact — meaning a board's reserve decisions can be litigated, and owners have successfully asserted claims related to reserve failures, including commingling operating and reserve accounts and failing to itemize reserves. In that litigation environment, a documented reserve study weighing the five Section 9 factors is a board's strongest defense. Operating with no reserve analysis is, as Illinois practitioners put it, difficult to defend if a major component fails. This is fiduciary duty with Illinois-specific case-law backing.

The Waiver — and Its Catch

Illinois allows the reserve requirement to be waived, but the mechanism is deliberately demanding. If the condominium instruments don't require a set reserve amount, unit owners can waive the requirement by a two-thirds vote (reinstatable later by another two-thirds vote). The catches make waiver unattractive:

• The waiver must be disclosed in the financial statements in bold print and told to prospective purchasers
• Once waived, unit owners cannot assert a claim against the board or managing agent for inadequate reserves

That last point cuts both ways — it protects the board from liability, but it also signals to every buyer that the community chose not to fund reserves, which depresses marketability.

Disclosure to Buyers

Section 22.1 requires that prospective purchasers receive a statement of the status and amount of the reserve fund, including any portion earmarked for a specific project. Combined with lender questionnaires — which increasingly probe reserve adequacy under the tightening GSE rules — a thin Illinois reserve fund becomes visible at every sale and refinance.

The Legislation to Watch

Illinois has pending legislation (HB2563, introduced in the 2025–2026 session) that would amend both the Condominium Property Act and the Common Interest Community Association Act to require a reserve study every five years, with a five-year window to comply, a requirement to make the study available to prospective purchasers, and an exemption for associations with 15 or fewer units. If it passes, Illinois would move from its current "fund reasonable reserves" posture into the mandatory-study tier alongside states like Virginia and Nevada. Boards should watch this closely — and getting ahead of it with a current study now is the low-risk move.

Illinois Component Realities

• Harsh freeze-thaw climate — Chicago-area winters are brutal on roofing, masonry, asphalt, and concrete; the repeated freeze-thaw cycle ages exterior components faster than mild-climate tables assume
• Older urban building stock — much of Chicago's condo inventory is decades old, with aging facades, mechanical systems, and (in high-rises) significant capital obligations
• Lake-effect moisture and wind drive envelope and roofing wear
• High-rise complexity — Chicago's towers carry elevator, facade, and mechanical reserves that dwarf those of suburban garden condos

The Illinois Board Playbook

1. Fund reasonable reserves as Section 9 requires — this is the law, not optional
2. Document how you weighed the five statutory factors — and attach any reserve study to the minutes
3. Commission a reserve study even though it's not yet mandated — it satisfies factor #4 and is your defense in Illinois's litigation-prone environment
4. Avoid waiver unless you fully accept the disclosure and marketability consequences
5. Watch HB2563 — a five-year study mandate may be coming; get ahead of it
6. Never commingle operating and reserve funds — Illinois case law specifically penalizes it (fund separation)

Illinois tells boards exactly what to weigh and holds them accountable through the courts if they don't. The boards that commission a study and document the five factors are both compliant and protected. For how Illinois compares nationally, see HOA Reserve Requirements by State.