That gap is the practical obstacle. An owner who wants panels does not usually get told no; they get told the request is under review, then that the board wants an engineer's opinion, then that the engineer's report is being reviewed by counsel, then that the matter will be taken up after the reserve study. Meanwhile the installer's quote expires and the federal tax credit year turns over.

A statutory shot clock converts a delay strategy into a decision. That is why the number, rather than the cooperation language, is what associations objected to.

The hardest case in condominium solar

The shared roof is genuinely difficult, and it is worth being fair about why boards resist.

A roof is a common element. Its replacement is one of the largest line items in any reserve plan. An array installed by one owner in year three of a twenty-year roof has to be removed and reinstalled when the roof is replaced — and the question of who pays for that, and who is liable if a penetration leaks in year eleven, is not answered by a right to install.

HB 5402's first condition tried to sidestep this by limiting the right to the portion of the roof the owner “owns and maintains.” In most Illinois condominium declarations that portion is nothing at all — the roof is entirely common element — which is why the second condition, unanimous agreement of all owners sharing the roof, is doing the real work. And unanimity in a multi-unit building is a high bar.

So the bill was narrower than it appeared: for most condominiums it would have required every affected owner to agree, and then given the board 60 days to process a request it could no longer stall.

SB 2785 — the townhouse carve-out that also died

A companion Senate bill would have provided that “shared roof” does not include a roof that serves townhouses, narrowing the regime so townhouse rows fell outside it. CAI sought amendments rather than opposing outright; it died in committee.

Small text, large consequence. Several thousand Illinois townhouse associations have roofs that are association-maintained but unit-specific — each unit sits under its own roof section, and the association maintains all of them under a common maintenance obligation. Whether that is a “shared roof” is genuinely ambiguous, and the carve-out existed because nobody wanted to find out through litigation.

Where this leaves an Illinois board

Exactly where it was. The Homeowners' Energy Policy Statement Act governs, there is no deadline, and the association's declaration controls the common element. A board can adopt an energy policy statement that sets out an application process, an engineering standard, a removal-and-reinstatement allocation and a decision timeline of its own choosing.

Boards that do this voluntarily are in a materially better position when a deadline eventually arrives by statute — and it is a reasonable bet that one will, because the shot clock is the least controversial idea in the bill.

What to watch next

Whether a 2027 version couples the 60-day clock with an allocation rule for roof replacement. That is the provision that would make the bill acceptable to boards, and its absence is the best explanation for why this one never left Rules.