Ten days earlier than Miami
Florida's petition deadline is not a state date. It is 25 days from whenever a given property appraiser mailed the TRIM notices, which means every county lands somewhere different in September.
Duval lands first. Its Value Adjustment Board, administered through the City of Jacksonville, has published Tuesday, September 8, 2026 as the 2026 filing deadline for most petitions, reflecting the 25-day window under Section 194.011(3)(d), Florida Statutes.
An owner holding property in Jacksonville and South Florida who works from one date will miss this one. By the time Miami-Dade's September 18 deadline is approaching, Duval has been closed for over a week, and there is no mechanism to reopen it outside narrow good-cause exceptions.
The consolidated-government wrinkle
Duval County and the City of Jacksonville operate as a consolidated government, and the Value Adjustment Board reflects that. Petitions go to the Value Adjustment Board care of the Office of the Clerk of the Circuit Court at 117 West Duval Street, Suite 305, Jacksonville, or online.
This matters for a practical reason more than a legal one. If you are searching for filing instructions and looking for a county page in the shape other Florida counties use, the Duval material lives under Jacksonville's departmental structure instead. Owners lose days looking in the wrong place, and days are the thing in short supply here.
The mailing date is printed in the bottom right corner of each Duval notice. That is the date the Clerk measures against.
Our Duval county guide links the city's own Value Adjustment Board page directly.
Online filing runs to 11:59 p.m., and the date is subject to change
Duval accepts petitions online, and online filing closes at 11:59 p.m. on the deadline. That is genuinely later than a counter close, and it is worth knowing precisely rather than approximately — an owner who assumes a 5:00 p.m. cutoff loses most of a working day they actually had, and an owner who assumes the portal drifts into the next morning loses the year.
Two related cautions. Duval notes that the published date is subject to change, so it is worth re-checking the Clerk's page rather than relying on a figure calendared in July. And where a paper petition is being mailed instead, the timeliness rules are the Clerk's; a postmark is not automatically equivalent to receipt.
What the Jacksonville file usually turns on
Duval's base is weighted toward logistics, distribution and port-adjacent industrial, with a downtown and suburban office market, retail and a substantial multifamily component.
For industrial and distribution property, the evidence tends to be leasing rather than physical:
- Actual rent achieved on recent renewals, which in a market with new supply may sit below the modeled assumption.
- Real vacancy and downtime between tenants, not stabilized vacancy.
- Concessions granted to hold a tenant, which a headline rent hides entirely.
- Functional limits — clear height, dock configuration, truck court depth — where a building competes against newer stock that the model may be treating as comparable.
That last point is the one most often left out. A building that reads as comparable on square footage and age may be functionally a different product than the new box down the road, and functional obsolescence is a valuation argument with a long history behind it.
Before the eighth
An informal conversation with the property appraiser's office is worth having, and it does not pause the clock. With Duval's earlier deadline, the margin for using the informal path first and filing second is thinner here than anywhere else in Florida. File, then talk.
One honest disclosure: where a Florida review turns up a factual error in the physical record that understates a property, the appraiser may revise the value upward. We screen for that before filing, do not file where it is present, and withdraw if it emerges.
If you want the county's own records checked against your building before September 8, start a free analysis. If there is no case, we will tell you that too.
Related: TRIM Notice Explained, the deadlines reference, and the Florida guide.