f you own property in Gwinnett County, Georgia, you must pay Gwinnett County property taxes annually. These taxes are levied to support infrastructure and provide services.
Georgia property owners in Gwinnett County receive their Annual Notice of Assessment on January 1 of every year. If you disagree with the value on the assessment, you have until Sunday, July 7, 2025, to file an appeal.
This guide explains how appealing a property tax assessment works. By the end, you’ll also learn how Ownwell can strategically aid with the Georgia property tax appeal process.
Understanding Property Tax Rates
Gwinnett County looks at several factors to calculate property taxes and determine your property tax bill.
In Georgia, the assessed property value is 40% of the full combined fair market value of your home and land. The fair market value is the amount a knowledgeable buyer would pay for your property.
If you meet the Gwinnett County exemption status standards, you can exclude an amount or percentage of your property value.
Also called the tax rate, the millage rate is set annually by the Board of Commissioners. The Board of Education and the governing authority of each municipality also establish millage rates based on property values.
After assessing these factors, the Board of Tax Assessors will calculate your Gwinnett County property tax rate using this formula:
Annual Property Tax = (Assessed Value – Exemptions) x Millage Rate
Feel free to look at our county trends for Gwinnett County.
Important Trends, Dates, and Deadlines
Here’s a close look at the trends, dates, and deadlines you need to know to prepare for Gwinnett County property taxes.
Gwinnett County Property Taxes Assessment Trends
As of June 2025, Gwinnett County has not yet released its 2025 county property tax rates and trends. However, if we look at the trends from the last few years, we can see a steady increase in property values and net taxes year over year.
Here’s a summary of total revenue collected and disbursed from Gwinnett County’s 2024 Annual Report:
2022 | 2023 | 2024 | |
|---|---|---|---|
County | $765,955,270.20 | $844,986,860.76 | $927,878,511.24 |
Your 2025 assessment will likely be based on these higher values. If your home has been over-assessed, you could be paying more than your fair share in property taxes.
The Homestead Exemption Deadline
You may be eligible for one or more homestead exemptions to reduce your property tax burden. These can significantly lower the taxable value of your home if you live in the property as your primary residence. The deadline to apply for any exemption is April 1 of the tax year. However, there is a 45-day late window after the notice of assessments is mailed.
The 2025 Appeal Filing Deadline
In 2025, annual notices of assessment were mailed on May 23. If you disagree with your 2025 property assessment, you have 45 days from that date (July 7) to file an appeal.
Navigating the Appeals Process
If you disagree with your 2025 property assessment, here’s what you need to do.
Steps to Appeal Property Taxes
Follow these steps to appeal your 2025 property assessment:
If appealing online, use Gwinnett County’s online portal to submit a letter of disagreement that identifies your property by address or parcel number.
If you prefer filing your property appeal by mail, send a completed PT311A appeal form to:
ATT: Appeals - Gwinnett County Assessors’ Office, 75 Langley Drive, Lawrenceville, GA 30046.
You will receive an amended notice of assessment (form PY-306C) if the Tax Assessors’ Office has reviewed your appeal and agrees to change your appraised value.
If you’re dissatisfied with the assessor’s decision, you can request a hearing before the Board of Equalization (BOE).
If you disagree with the BOE's decision, you can schedule a settlement conference with the Tax Assessors' Office.
If the settlement conference is unsuccessful, you can appeal to the Superior Court.
Note, this is a lengthy process, and without considerable work and substantial evidence, your issues might be futile.
Evidence Collection for Successful Appeals
The strongest appeals include well-documented evidence to support your claim. Here’s what to gather:
Recent sales data: Get listings and closing prices for similar homes in your area.
Photos:Document any structural issues, damage, or unique property factors that could lower value.
Appraisals: A professional appraisal from the past one to two years can strengthen your case.
Neighborhood comparisons: Show how your assessment differs from similar properties nearby.
Prior assessments: If your property's assessed value has jumped significantly in one year, that could be a red flag. Look deeper into it to see if it’s worth bringing up in your appeals case.
299C Property Tax Freeze
Also called the 299c lock, the three-year freeze and value cap in Georgia locks in your assessed value for three years if you appeal your property value to the Board of Equalization and win any reduction.
Thus, to ensure a fair and significant reduction, it's crucial to make the strongest case possible when appealing property tax assessments. That’s where professionals like Ownwell come in! Recent Legislative Changes Affecting Property Taxes
To protect homeowners from rapidly rising property values, Georgians passed Georgia Amendment 1, which originated as House Bill 581 (HB 581). This introduced the floating homestead exemption, which limits property tax increases for homeowners to the state's inflation rate.
However, Gwinnett County and its school districts opted not to adopt this exemption.
This means Gwinnett homeowners will not receive this protection, and your property’s assessed value can still increase significantly from one year to the next. As a result, even if your millage rate stays the same, your tax bill may continue to rise.
Lower Your Property Taxes with Ownwell
Appealing property taxes in Gwinnett County can be daunting, especially if you’re not an expert. If you don’t make a strong case, you’ll have to pay more than you deserve.
That’s where Ownwell comes in. We're experts on Georgia property tax and specialize in managing end-to-end property tax appeals and protests. Whether you need assistance with paperwork, a Gwinnett County property tax assessor search, negotiations, or appeal hearings, we handle everything for you to help maximize your tax savings.
Enter your address, and estimate your savings today. You won’t have to pay upfront costs, and you’ll only pay if you save.
