Gwinnett County Property Tax Appeal: Filing Guide 2026

Gwinnett County Property Tax Appeal: Filing Guide 2026

Gwinnett County is one of the fastest-growing counties in Georgia, and property values have been climbing steadily. The county's effective tax rate is around 1.10%, which is moderate by national standards but adds up quickly as home values increase. If you believe your assessment is too high, Georgia law gives you a clear right to appeal.

How Gwinnett County Assessments Work

The Gwinnett County Board of Tax Assessors is responsible for setting property values. Georgia law requires properties to be assessed at 40% of fair market value. The assessed value (40% of market value) is what the tax rate applies to.

Component	Example ($400,000 home)
Fair Market Value	$400,000
Assessment Ratio	40%
Assessed Value	$160,000
Homestead Exemption	Varies by exemption type
Millage Rate (example: 28 mills)	$4,480 (before exemptions)

Assessment notices are typically mailed in April or May. Your appeal clock starts when you receive the notice.

Key Deadlines

Event	Timeline
Assessment notices mailed	April - May 2026
Appeal deadline	45 days from the date on your notice
Homestead exemption application	April 1, 2026

Step-by-Step: Gwinnett County Appeal

Step 1: Review Your Notice of Assessment

When you receive your annual assessment notice, compare the fair market value listed with what you believe your home would actually sell for. Also check the property description for errors in square footage, lot size, bedrooms, bathrooms, and features.

Step 2: Gather Evidence

Your appeal needs to show that the assessor's fair market value is wrong. Strong evidence includes:

• 3-5 comparable sales in your neighborhood that sold for less than your assessed market value
• A recent appraisal from a refinance or purchase
• Photos of property condition issues (deferred maintenance, foundation problems, water damage)
• Documentation of negative external factors (busy road, power lines, commercial adjacency)

For detailed guidance on finding and using comparable sales, see our comparable sales guide.

Step 3: File Your Appeal

Submit a written appeal to the Gwinnett County Board of Tax Assessors within 45 days of your notice date. You can file:

• In person at the Gwinnett County Tax Commissioner's Office
• By mail to the Board of Tax Assessors
• Online through the county's appeal portal (if available for that tax year)

Include your name, parcel ID, the value you're requesting, and your supporting evidence. There is no filing fee.

Step 4: Informal Review

After filing, the Board of Tax Assessors may contact you for an informal review. An appraiser from their office will discuss your evidence and may offer a settlement. If you reach agreement, the case is resolved. If not, it moves to the Board of Equalization.

Step 5: Board of Equalization Hearing

The Board of Equalization (BOE) is a panel of citizens appointed to hear property tax appeals. At the hearing:

• You present your evidence for a lower value
• The county presents its case for the current value
• The board deliberates and issues a decision

Hearings are typically 15-20 minutes. You can bring an attorney or representative, but it's not required. For tips, see our hearing preparation guide.

Step 6: Further Appeals

If the BOE rules against you, you have two options:

• Superior Court appeal: File within 30 days. This is a formal legal proceeding where an attorney is recommended.
• Binding arbitration: Available for residential properties valued under $750,000. Costs $500 (refundable if you win). An independent arbitrator reviews the case.

Gwinnett County Exemptions

Standard Homestead Exemption

Gwinnett County offers several homestead exemptions. The basic homestead exemption reduces the assessed value for county taxes. Additional exemptions are available from the school district and the city (if applicable).

Senior Exemptions

Seniors age 65 and older may qualify for enhanced homestead exemptions that provide larger reductions, including exemptions from school taxes. Income limits apply for some senior exemptions. Contact the Gwinnett County Tax Commissioner for current amounts and requirements.

Disabled Veteran Exemption

Veterans with a 100% service-connected disability are exempt from all ad valorem property taxes on their homestead. Partial exemptions are available for lower disability ratings.

Apply for all exemptions by April 1 through the Tax Commissioner's Office.

Gwinnett County Tax Rates

Your total property tax bill includes levies from multiple jurisdictions:

Taxing Authority	Typical Millage Range
Gwinnett County	6-7 mills
Gwinnett County Schools	18-20 mills
City (if incorporated)	3-8 mills
State	0.25 mills
Total typical range	27-35 mills

Tips for Winning Your Gwinnett County Appeal

• Act quickly: The 45-day window goes fast. Start gathering evidence as soon as you receive your notice.
• Focus on recent sales: Use sales from the past 6-12 months that are close to your property. The Board of Equalization values recent, nearby comparables most.
• Check the property card: Look up your property on the Gwinnett County Tax Assessor's website. Verify every detail. Errors in square footage or lot size directly affect your value.
• Bring photos: If your property has issues the assessor may not know about (foundation problems, needed roof replacement, water damage), photographs are compelling evidence.
• Be organized: Present your comparables in a table format. Show the address, sale price, sale date, square footage, and how it compares to your property.

Frequently Asked Questions

How often does Gwinnett County reassess?

Georgia requires annual assessments. The Gwinnett County Board of Tax Assessors reviews and updates property values every year based on sales data and market conditions.

Can my value go up if I appeal?

Under Georgia law, the Board of Equalization cannot raise your value above what the Board of Tax Assessors originally set. Your value can only stay the same or go down.

How much can I realistically save?

A typical successful appeal in Gwinnett County reduces the market value by 5-15%. On a $400,000 home, a 10% reduction saves approximately $450 per year in property taxes.

Should I appeal every year?

Review your notice every year. If the value increased significantly or if comparable sales support a lower number, appeal. There's no penalty for filing, and the process is free. For more on appeal strategy, see our Georgia property tax lowering guide.