Updated September 5, 2026. Quick answer: Iowa’s condominium statute sets no ownership-vote threshold for a special assessment at all; the bylaws must simply state the “Manner of collecting from the apartment owners their share of the common expenses” (Iowa Code § 499B.15(5)), and the only statutory default is that a meeting quorum is “a majority of apartment owners” unless the bylaws say otherwise (§ 499B.15(3)).
Key statute: Iowa Code Chapter 499B (Horizontal Property Act / condominiums); Iowa Code Chapter 499C (Unit Owners Associations, Access to Records, 2023) for document-access rights only; non-condominium HOAs rely on the recorded declaration plus Iowa Code Chapter 504 (Revised Iowa Nonprofit Corporation Act)
How Iowa lets an association approve it
Iowa Code § 499B.15 requires the bylaws to cover “Method of calling or summoning the co-owners to assemble; what percentage, if other than a majority of apartment owners, shall constitute a quorum…” (subsection 3) and “Manner of collecting from the apartment owners their share of the common expenses” (subsection 5). Nowhere in Chapter 499B is there a statutory vote percentage specific to a special assessment; the entire approval mechanism is delegated to each association’s own bylaws.
The notice you’re owed
Iowa Code § 499B.15(2) provides: “Notice of each board meeting must be mailed or delivered to each apartment owner at least seven days before the meeting.” This is a general board-meeting notice rule (it would cover a meeting at which the board adopts a special assessment) rather than a rule written specifically for special assessments; the statute does not separately specify what the notice must say about a proposed assessment.
Paying it: plan, interest, and late fees
Chapter 499B’s lien statute, § 499B.17, says only that unpaid common-expense assessments “shall constitute a lien… prior to all other liens except only tax liens… and all sums unpaid on a first mortgage of record,” enforceable “by suit… in like manner as a mortgage of real property.” It contains no interest rate, no late-fee provision, and no statutory installment-payment right; the statute is simply silent on all three.
Iowa Code § 499B.17: an unpaid common-expense assessment “shall constitute a lien on such apartment prior to all other liens except only tax liens… and all sums unpaid on a first mortgage of record,” foreclosable by the council of co-owners “in like manner as a mortgage of real property,” with the plaintiff “entitled to the appointment of a receiver” to collect rent during foreclosure.
Does Iowa require a reserve study?
No. Chapter 499B contains no reserve-study or reserve-funding requirement, and Chapter 499C (2023), despite some secondary sources describing it more broadly, is, on its actual text, only two sections long (“Definitions” and “Records and documents, access”) and says nothing about reserves, assessments, or votes at all.
Honest gaps
We verified directly that Iowa Code Chapter 499C is a two-section records-access statute, not a comprehensive common-interest-ownership act; several secondary sources found during research described it (inaccurately, based on what we actually read) as containing broader UCIOA-style provisions, which is exactly the kind of secondary-source error this project’s sourcing rule is designed to catch. Non-condominium HOAs (planned communities) are governed primarily by their own declaration and by the general Nonprofit Corporation Act (Iowa Code ch. 504), which we did not review for any assessment-specific rule, so materially different practice could exist there. We also did not review Chapter 499B in its entirety (it runs through § 499B.21).
Source note. Read from https://www.legis.iowa.gov/docs/code/499B.14.pdf; https://www.legis.iowa.gov/docs/code/499B.15.pdf; https://www.legis.iowa.gov/docs/code/499B.17.pdf; https://www.legis.iowa.gov/docs/code//499C.pdf on September 5, 2026.
Related: HOA rules in a 55+ community · how a special-assessment foreclosure actually works · lump sum vs. a payment plan.
General information drawn from each state’s own statutes as read at its official legislature or code-publisher site (or a verbatim codified mirror where noted), not legal advice. Special-assessment law is state law, and every association’s own declaration and bylaws add rules on top of the statutory floor described here. We are not a law firm and this is not legal advice.