Can a Florida county invoke 'extraordinary circumstances' to raise impact fees above the 50% statutory cap based on steady population growth alone?
Plain-English summary
Florida Attorney General James Uthmeier concluded that a county cannot rely on steady population growth as the "extraordinary circumstances" justification to push impact fees past the statutory 50% cap. The opinion responded to Nassau County, where the local population had grown about 17% over five years (roughly 3.4% annually) and where the proposed impact-fee increase was close to 100%.
The AG's reasoning runs in three steps. First, § 163.31801(6) already permits a 50% increase once every four years for ordinary growth, so by design the cap is calibrated to handle growth. Second, § 163.31801(6)(g) authorizes a higher increase only on a "demonstrated-need study" that shows "extraordinary circumstances." Third, the AG used Black's Law Dictionary to read "extraordinary circumstances" as "a highly unusual set of facts that are not commonly associated with a particular thing or event," and concluded that a 3.4% annual growth rate is exactly the kind of fact commonly associated with the impact-fee context.
The opinion also warned that the proposed increase, if implemented without meeting the statutory exception, "appears to be a tax disguised as an impact fee."
What this means for you
County and city officials setting impact fees
The opinion treats § 163.31801(6) as a structured ceiling. Increases up to 50% once every four years are permitted under the ordinary process. Increases above 50% are permitted only when a demonstrated-need study expressly shows extraordinary circumstances. The AG read "extraordinary circumstances" as facts that fall outside what the 50% cap was already calibrated to address, so steady population growth (even at the higher end of Florida's range) does not qualify. The AG also signaled that a near-100% increase unsupported by that showing is at risk of being characterized as a disguised tax.
Home builders and developers
The opinion narrows the categories of justification that will not satisfy § 163.31801(6)(g): ordinary statewide growth, predictable annual rate increases at the higher end of the state's range, and growth rates above some counties but below others. The AG treated those as the type of facts already inside the impact-fee statutory framework, not the type that justifies departing from the cap.
State legislators and policy analysts
The opinion reads § 163.31801(6) as a deliberate balance between local fiscal needs and the affordability concerns of new development. The AG observed that allowing ordinary growth to count as "extraordinary" would let the exception in subsection (6)(g) swallow the rule in subsection (6), which the AG read as both an outcome the statute does not allow and a violation of statutory canons.
Homeowners and homebuyers
The opinion identifies the cost-pass-through concern as one the legislature already addressed when it adopted the cap. The AG framed excessive impact fees as the policy harm the statute is designed to prevent, not as a separate constitutional question.
Common questions
Q: What is an "impact fee"?
A: An impact fee is a charge a local government imposes on new development to fund infrastructure (roads, schools, parks, water/sewer) that the new residents or businesses are projected to require. Impact fees, by Florida statute, are distinct from taxes.
Q: How are impact fee increases capped under Florida law?
A: Section 163.31801(6) provides that an impact fee increase may not exceed 50% of the current rate, and may not occur more than once every four years. Section 163.31801(6)(g) allows an increase above 50% only when a demonstrated-need study expressly shows extraordinary circumstances.
Q: How does the AG define "extraordinary circumstances"?
A: The opinion adopts the Black's Law Dictionary definition: "a highly unusual set of facts that are not commonly associated with a particular thing or event." The AG treated this as the plain ordinary meaning of the statutory phrase, consistent with how the same term is defined in other Florida statutes.
Q: Why did Nassau County's 17% growth not qualify?
A: The AG identified three reasons. The 3.4% annual rate is not highly unusual against statewide Florida growth. Other Florida counties grew faster without invoking the exception. And reading ordinary growth as "extraordinary" would let subsection (6)(g) swallow subsection (6)'s cap, which the AG treated as an impermissible result.
Q: What did the AG mean about a "tax disguised as an impact fee"?
A: The opinion observed that the implementation of an almost-100% increase "without the requisite justification appears to be a tax disguised as an impact fee." The AG did not separately analyze the constitutional consequences of that characterization, but flagged it as a caution.
Background and statutory framework
The Florida Impact Fee Act, codified at § 163.31801, was designed to let local governments fund the infrastructure new development requires while preventing impact fees from becoming a back-door tax that arbitrarily inflates housing costs. The Act allows increases up to 50% of the current rate, no more than once every four years, with limited procedural requirements. Increases above 50% trigger § 163.31801(6)(g), which requires a "demonstrated-need study" that expressly shows "extraordinary circumstances."
The phrase "extraordinary circumstances" is undefined in the statute. The AG used the Black's Law Dictionary definition and observed that it is consistent with how other Florida statutes use the phrase. The AG then applied that meaning to the facts presented:
- Steady growth is not extraordinary. A 3.4% annual rate is on the higher end but nowhere near "highly unusual."
- Other Florida counties grew faster without invoking the exception.
- The exception cannot swallow the rule. Population growth is the very fact the 50% cap is calibrated to address, so reading "extraordinary circumstances" to include ordinary growth would frustrate the statute.
Citations and references
Statutes:
- § 163.31801, Fla. Stat. (Florida Impact Fee Act)
Source
- Original PDF: https://www.myfloridalegal.com/print/pdf/node/28083
Original opinion text
The full opinion as issued by Attorney General James Uthmeier:
The Honorable Richard Gentry
Unit 108
275 South Charles Richard Beall Boulevard
DeBary, Florida 32713
Dear Representative Gentry:
This office received your letter, dated December 17, 2025, requesting a legal opinion on a question of Florida law. You ask substantially the following question: whether Nassau County's 17% population increase over the previous five years qualifies as "extraordinary circumstances" under section 163.31801, Florida Statutes, to authorize the assessment of impact fees in excess of the statutory cap.
In short, my answer to your question is no. The steady, albeit heightened, increase in population of 17% over the previous five years does not qualify as "extraordinary circumstances" under the exception found in section 163.31801 for exceeding the statutory cap on impact fees.
Analysis
Impact fees are imposed by local governments to fund infrastructure needed to expand local services to meet the demands of population growth caused by development. Section 163.31801(6), Florida Statutes, provides certain limitations on impact fee increases proposed by governing authorities. These restrictions include, among other things, that "[a]n impact fee increase may not exceed 50 percent of the current impact fee rate." And any increase may not occur "more than once every 4 years." There is an exception, however, to the 50 percent statutory cap.
Section 163.31801(6)(g), Florida Statutes, authorizes increases to impact fees above 50 percent provided certain procedural requirements are met. One of these requirements includes providing a "demonstrated-need study." The study shall "expressly demonstrate[] the extraordinary circumstances necessitating the need to exceed" the statutory cap. Yet "extraordinary circumstances" is undefined within the statute. We begin, therefore, with the plain and ordinary meaning of the text.
We can start and finish that determination with the dictionary. Black's Law Dictionary defines "extraordinary circumstances" as "[a] highly unusual set of facts that are not commonly associated with a particular thing or event." This is a commonsense definition and consistent with how the phrase is defined in other Florida statutes.
Applying that definition of extraordinary circumstances to the question presented here, we do not find that a 17% population increase over the previous five years, approximately 3.4% annually, qualifies as a "highly unusual set of facts" that establishes a need for an increase of impact fees in excess of the 50% permitted in section 163.31801(6)(g). Florida has experienced considerable statewide population growth over the last several years; a 3.4% year-over-year growth rate in one jurisdiction cannot, therefore, be fairly construed as "extraordinary." Yes, Nassau County's population increases over a five-year period are higher than those in some other Florida counties. But Nassau County's population increases over that period are lower than other Florida counties, counties that have not sought to levy extraordinary impact fee increases. These observations undercut the existence of a set of facts that would justify a departure from the statutorily allotted 50% increases.
Remember also that Section 163.31801(6), Florida Statutes, already permits local governments to raise rates due to new development and growth. Indeed, impact fees exist for that very purpose, to aid local communities as they adjust to "new growth." Local governing authorities accordingly may raise impact fees up to 50% every four years without any special justification. The sole exception to this cap is a showing of extraordinary circumstances. But those extraordinary circumstances cannot be the type of thing, steady population growth, that the statute already treats as unextraordinary. Put differently, the same growth that justifies limited, regimented impact fee increases in the statute can't also justify extraordinary increases that jettison those strictures associated with those limited, regimented impact fee increases. To do so would fatally frustrate the statute's 50% cap and prohibition on increasing fees "more than once every four years." In this instance, if Nassau County's justification to invoke "extraordinary circumstances" and increase the impact fees was correct, the statutory exception would swallow the statutory rule. Such a conclusion would be quite the workaround for local governments, but it would also violate multiple statutory canons.
Conclusion
A 17% population increase over the previous five years does not qualify as "extraordinary circumstances" under the exception in section 163.31801 to authorize the assessment of impact fees in excess of the 50% statutory cap. Therefore, Nassau County may not increase its impact fees above 50% of the statutory cap under these circumstances. We acknowledge that population growth can create strain on local governments' fiscal responsibilities. But passing excessive costs on to home builders, and in turn homeowners, is something that, according to the Legislature, should occur only in "extraordinary circumstances." Impact fees are not taxes. We caution that the implementation of the increases by Nassau County of almost 100% of the current rate without the requisite justification appears to be a tax disguised as an impact fee.
Sincerely,
James Uthmeier
Attorney General