How to Appeal Property Taxes in Duval County, Florida (2026 Guide)

Direct answer: Duval County’s 2026 value appeal deadline is controlled by the TRIM mailing date: your petition must be received by the Value Adjustment Board by the 25th day after the Notice of Proposed Property Taxes is mailed. As of July 13, 2026, Duval had not yet posted the 2026 TRIM mailing date; using the county’s usual mid-August Friday mailing pattern, the working deadline is Tuesday, September 8, 2026, but the date printed on your 2026 TRIM notice is the controlling date. File online through Duval’s Axia VAB portal, or mail/hand-deliver to Value Adjustment Board, 117 W. Duval Street, Suite 305, Jacksonville, FL 32202; do not email or fax an initial petition. (jacksonville.gov)

How assessments work in Duval County

Duval County values real property for the tax roll as of January 1. The Property Appraiser’s Office describes just value as market value based on what a willing buyer would pay a willing seller, generally using comparable sales before January 1 and excluding estimated selling costs. Your TRIM notice separates just/market value, assessed value, exemptions, taxable value, and the proposed millage rates. (jacksonville.gov)

That distinction matters. For a newer buyer, assessed value may reset close to market value. For a long-time homesteaded owner, assessed value may be far below market because the Save Our Homes cap limits annual assessed-value increases to 3% or less, and Duval lists the 2026 SOH cap as 2.7%. Non-homestead property generally has a 10% assessment cap. (jacksonville.gov)

The Property Appraiser sets value and exemptions; taxing authorities set tax rates; the Tax Collector sends bills. In 2025, the latest final millage chart available when this guide was written, most City of Jacksonville/General Services properties outside the Beaches and Baldwin used total final millage of 17.7412 mills; Jacksonville Beach was 18.4452, Atlantic Beach 17.2004, Neptune Beach 17.8161, and Baldwin 18.9701. (jacksonville.gov)

Whether you should appeal

Appeal if you can show the January 1, 2026 just value is too high or an exemption/classification/portability decision is wrong. Strong Duval evidence usually means: closed comparable sales from your neighborhood before January 1; photos of condition issues the appraiser’s record misses; contractor estimates for pre-existing damage; incorrect building area, pool, garage, or effective-year-built data on the property record; or proof that your homestead/senior/veteran/disability exemption should have applied.

Do not appeal only because the tax bill feels high. The VAB cannot change millage rates, garbage/stormwater/non-ad valorem assessments, or city/school budgets. Also, a market-value appeal may not save a capped homestead any money unless the reduction pushes just value below assessed value. Example: if your just value is $420,000 but your SOH assessed value is $285,000, winning a reduction to $390,000 may still leave taxable value unchanged.

I did not find a Duval County-published residential VAB success rate or median reduction on the official pages reviewed. Treat any private “average savings” claim skeptically unless it is tied to your parcel, your cap status, and your tax district.

Step-by-step how to file

1. Start with an informal review, but do not wait on it. Duval’s TRIM page says to contact the Property Appraiser for an informal review if you disagree. The Florida DR-486 instructions also say an informal conference is not required and does not change your filing deadline. (jacksonville.gov)

2. Use the right form. Most homeowners use DR-486, Petition to Value Adjustment Board – Request for Hearing. Use DR-486PORT for portability/transfer of homestead assessment difference, DR-486DP for tax deferral or penalties, DR-486A for written authorization of an agent, DR-486POA for power of attorney, and DR-486MU for multiple parcels/accounts. Duval links these on its VAB forms page, and the Florida Department of Revenue forms page lists the current versions. (jacksonville.gov)

3. Choose the filing method. Online filing is available through the Axia VAB system. Paper petitions may be mailed or filed in person at Value Adjustment Board, 117 W. Duval Street, Suite 305, Jacksonville, FL 32202. Duval’s FAQ says the VAB does not accept emailed or faxed initial petitions because the filing fee must be paid at filing. (qa-vab.coj.net)

4. Pay the fee. Duval’s 2026 Axia portal states the filing fee is $50 per parcel, plus any online credit-card convenience fee. In person, pay exact cash, check, or money order payable to Duval County Tax Collector; credit cards are for online filing only. Fees are waived for appeals from disapproval of homestead exemption, denial of tax deferral, and certain temporary-assistance recipients; joint/contiguous filings may have reduced additional-parcel fees. (qa-vab.coj.net)

5. Beat the received-by deadline. Paper filings must be physically received by the VAB by 4:30 p.m. on the deadline date; a postmark is not enough. Online filing must be completed and paid by 11:59 p.m. Eastern on the deadline. (qa-vab.coj.net)

What happens after

The appeal authority is the Duval County Value Adjustment Board. It is independent of the Property Appraiser and, locally, is composed of two City Council members, one School Board member, and two citizen members. Most residential valuation cases are heard by a neutral Special Magistrate, with a Property Appraiser representative present. (jacksonville.gov)

At the hearing, the Property Appraiser first tries to establish the presumption that the assessment was properly developed. You then present evidence that the just value is too high or that the exemption/portability decision is wrong. Hearings are less formal than court, but testimony and documents matter; Duval says residential petitioners are usually allowed about 15 minutes, with a similar response time for the Property Appraiser. (jacksonville.gov)

If you cannot attend, use the petition/hearing options carefully and contact VAB staff. Duval’s FAQ recognizes cases heard without the petitioner’s attendance if that was requested, but if you simply no-show, the Special Magistrate can recommend upholding the Property Appraiser. Written decisions often arrive several months after the hearing. If your tax bill comes due first, pay on time: value petitioners generally must pay all non-ad valorem assessments and at least 75% of ad valorem taxes before delinquency, or the petition can be denied. (jacksonville.gov)

Local tips

Check exemptions before you spend time on comps. Duval homestead can remove up to $50,000 of assessed value, though the second $25,000 does not apply to school taxes, and it triggers Save Our Homes protection. Other Duval-listed exemptions include low-income senior, long-term senior residency, disability, blind, widow/widower, deployed military, disabled veteran, surviving spouse of military/first responder, and first-responder total-and-permanent disability. (jacksonville.gov)

Worked savings example: suppose your non-capped taxable value in the City of Jacksonville General Services district is reduced by $50,000. Using the latest final total millage of 17.7412 mills, estimated annual ad valorem savings are $50,000 ÷ 1,000 × 17.7412 = $887.06. If the reduction is only $25,000, the estimate is $443.53. This does not reduce non-ad valorem charges, and it will differ in the Beaches or Baldwin tax districts. (jacksonville.gov)