Property Tax in Aventura, FL

How Florida Property Tax Actually Works: No State Income Tax, But a Real Bill

Florida has no state income tax, and property tax is set entirely at the county and local level rather than by the state itself, though the state does set the framework rules -- including the Save Our Homes cap -- that every county must follow. The Miami-Dade Property Appraiser (Tomas Regalado held the office as of the 2025 certification cycle) determines the assessed value of every parcel each year, and the various taxing authorities layered on top of that parcel -- Miami-Dade County itself, Miami-Dade County Public Schools, the South Florida Water Management District, and the municipality (in this case, the City of Aventura) -- each set their own millage rate, expressed in mills, where one mill equals $1 of tax per $1,000 of assessed value.

For a homesteaded primary residence, Florida's constitutional homestead exemption reduces the taxable assessed value before any millage is applied -- one source cited the 2026 homestead exemption at $51,411, up from $50,722 in 2025, though this specific figure should be verified directly with the Miami-Dade Property Appraiser rather than assumed as current. Non-homesteaded properties, including most investment condos and second homes in a market like Aventura, do not receive this exemption and are assessed closer to full market value from year one.

Save Our Homes: The Cap That Creates Real Neighbor-to-Neighbor Disparities

Florida's Save Our Homes amendment, approved by voters in 1992, limits the annual increase in a homesteaded property's assessed value to 3% or the change in the Consumer Price Index, whichever is lower -- the cap was set at 2.9% for the 2025 tax year based on the applicable CPI determination. This cap applies year over year for as long as the same owner holds the homestead exemption; when a property sells, its assessed value resets to full market value for the new owner's first year, and the cap begins accumulating fresh from that new baseline.

In a market with real long-term ownership like parts of Aventura's older towers -- Turnberry Isle North Tower dates to 1979, and several Williams Island towers to the late 1980s and early 1990s -- this creates a genuine, well-documented pattern across Florida generally: a longtime homesteaded owner can carry an assessed value running at only a fraction of a unit's actual market value after enough years of the 3%/CPI cap compounding below market appreciation, while a buyer purchasing an identical unit today starts fresh at full market assessment. That gap is a real, structural feature of Florida property tax, not a Aventura-specific quirk, but it is worth understanding concretely before assuming a current owner's tax bill says anything about what a new buyer would actually pay.

Portability: Carrying the Save Our Homes Benefit to a New Homestead

Florida also allows 'portability' -- a homesteaded owner selling one Florida homestead and buying another within two years can transfer up to $500,000 of their accumulated Save Our Homes assessment-value savings (the difference between market and assessed value on the prior home) to the new property, reducing the new home's taxable assessed value below its full market value. This is directly relevant to Aventura as a market that draws real numbers of buyers relocating within Florida -- downsizing from a single-family home elsewhere in Miami-Dade or Broward into an Aventura condo, for instance -- since portability can meaningfully soften the first-year tax jump that would otherwise come with a fresh full-market assessment.

This page does not have a confirmed, Aventura-specific dataset on how commonly portability is used by buyers moving into this market, and won't estimate one. A buyer considering this route should confirm eligibility and the exact dollar benefit directly with the Miami-Dade Property Appraiser's office before assuming portability applies to a specific purchase.

Miami-Dade's Millage Stack: What Was Confirmed and What Wasn't

Miami-Dade County's own FY2025-26 budget documentation put the countywide millage components -- county operating, county debt service, the county library system, and the Children's Trust -- at a combined roughly 5.7361 mills, with the Miami-Dade County Public Schools levy adding roughly 6.4990 mills and the South Florida Water Management District adding roughly 0.3911 mills. Combined, those confirmed non-municipal, non-fire components run near 12.6 mills. The county separately reported a combined rate (including fire-rescue and the unincorporated-area municipal-services levy) of roughly 16.93 mills for unincorporated areas, explicitly described in county materials as the lowest combined rate since 1982 -- but that unincorporated-area figure is not directly applicable to Aventura, since Aventura is its own incorporated municipality with its own separate municipal millage rather than paying the county's unincorporated-area municipal-services levy.

Aventura's own current municipal millage rate is where this page has a genuine, disclosed gap: two different property-tax aggregator sources gave meaningfully different figures -- one citing an approximate 2.35% effective combined rate for 2025, the other citing a 0.9% effective rate for 2026 with a $3,734 median annual tax bill on a $416,300 median assessed value. Those numbers are not necessarily contradictory (an 'effective rate' averaged across a city with a large share of long-tenured, Save Our Homes-capped homesteaded owners will look lower than a nominal millage rate applied to fresh purchases), but this page is not willing to state either as Aventura's single confirmed current municipal millage. Fire-rescue service cost structure for an incorporated municipality like Aventura -- whether through its own contracted arrangement with Miami-Dade Fire Rescue or a separate fire assessment -- was also not confirmed to a specific figure this pass.

Non-Ad-Valorem Assessments: Special Districts and What They Might Add

Beyond the standard ad valorem (value-based) millage, Florida property tax bills commonly include non-ad-valorem special assessments -- flat or formula-based charges for services like solid waste collection, stormwater management, or a special taxing district, which appear on the same annual TRIM notice and tax bill but are calculated independently of the property's assessed value. This page does not have a confirmed inventory of which non-ad-valorem assessments specifically apply within the City of Aventura, and won't guess. Check a specific parcel's full TRIM notice, issued each August, directly through the Miami-Dade Property Appraiser's website for the complete, itemized breakdown.

The Condo-Specific Line Item That Isn't Technically a Tax But Behaves Like One

For the large majority of Aventura buyers purchasing a condo unit rather than a single-family home, the property tax bill is only part of the recurring carrying-cost picture. Florida's post-Surfside condo safety law -- Senate Bill 4-D (2022), amended by Senate Bill 154 (2023) and House Bill 913 (2025) -- requires every condo or co-op building three stories or taller to complete a Structural Integrity Reserve Study (SIRS) (initially due by December 31, 2024, and every 10 years thereafter) and to fund the resulting reserve requirements without the reserve-waiver votes that were previously legal and are widely cited as a contributing factor in the 2021 Champlain Towers South collapse in Surfside that prompted this legislation. Milestone structural inspections are separately required at 30 years of building age generally, or 25 years for buildings the local enforcement agency designates as coastal -- Miami-Dade County has adopted that 25-year coastal trigger, which applies across Aventura's entire Intracoastal-front tower corridor.

This is not administered by the Property Appraiser or collected with the property tax bill, but it functions as a real, sometimes very large, recurring or one-time cost obligation tied directly to owning property here -- and given Aventura's genuine range of building ages (1979 through the 2000s and beyond), it is arguably a more financially significant variable for many Aventura buyers than the property tax millage itself. Ask any condo association directly for its current SIRS status, reserve funding level, and any pending or anticipated special assessment before making an offer; see this site's Real Cost and Buying Process pages for more on how to evaluate this before closing.

What This Page Does Not Know

This page does not have a single confirmed City of Aventura municipal millage rate, a confirmed non-ad-valorem assessment inventory for the city, or a confirmed fire-service cost structure for an incorporated Aventura parcel. It also does not have a portability-usage estimate specific to Aventura buyers.

Before budgeting a property tax bill for any specific Aventura parcel, pull the actual current TRIM notice or tax bill through the Miami-Dade Property Appraiser's parcel-search tool, or call the office directly, rather than relying on any aggregator estimate cited on this page or elsewhere online.