Rob Hartley

Founder, AppealDesk · Published June 24, 2026

Gwinnett County Property Tax Appeal: 2026 Deadlines & How to File

Updated June 2026

Gwinnett County homeowners have 45 days from their assessment notice to appeal — typically a July or August deadline in 2026. Georgia assesses residential property at 40% of fair market value. A successful appeal reduces your assessed value permanently until the next reassessment. Check if your Gwinnett home is over-assessed now.

Gwinnett County Assessment Overview

Gwinnett County is one of the most populous counties in Georgia, encompassing cities like Lawrenceville, Duluth, Snellville, and Norcross. Georgia law requires residential property to be assessed at 40% of fair market value. To find your implied market value, multiply your assessed value by 2.5. See our Gwinnett County data page for current tax rates and reassessment schedules.

Gwinnett County 2026 Appeal Deadline

In Georgia, the appeal deadline is 45 days from the date your assessment notice is mailed. Gwinnett County typically mails assessment notices in spring, making the appeal deadline fall in July or August 2026. Missing the 45-day window forfeits your right to appeal that year's assessment. Check your notice for the exact deadline printed on it.

You can appeal to the Gwinnett County Board of Assessors (informal review), the Board of Equalization (formal hearing), or — if the BOE decision is unsatisfactory — Superior Court. Most homeowners resolve their appeals at the Board of Equalization level.

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How to File a Gwinnett County Property Tax Appeal

Georgia property tax appeals are filed online through the Gwinnett County Tax Assessors Office portal. Filing is free and does not require an attorney. You will need your parcel ID from your assessment notice or property tax bill.

Step 1: File an Appeal of Assessment

Submit your appeal online at the Gwinnett County Tax Assessors website within 45 days of your notice date. Select the reason for appeal: market value, uniformity, or taxability. You may submit evidence at this stage or wait for the Board of Equalization hearing.

Step 2: Board of Equalization Hearing

After filing, your appeal is scheduled before the Gwinnett County Board of Equalization, an independent panel of property owners. Present your evidence — comparable sales, photographs, and any errors in the property record. The BOE issues a written decision after the hearing.

Step 3: Superior Court (if needed)

If the BOE decision is unsatisfactory, you can appeal to the Gwinnett County Superior Court within 30 days of the BOE order. Most residential appeals are resolved at the BOE level without court involvement.

Evidence for a Gwinnett County Appeal

The strongest Gwinnett County appeals use comparable sales evidence, accounting for Georgia's 40% assessment ratio. Your implied market value = assessed value x 2.5.

1. Comparable Sales

Find 3-5 recent arm's-length sales of similar homes where the implied market value (sale price x 0.4) is lower than your assessed value. Focus on the same neighborhood, similar size, age, and condition, and sales within the prior 12 months. See our comparable sales guide.

2. Uniformity Argument

Georgia law requires uniform assessment. If similar neighboring properties are assessed at a lower implied market value, document the disparity using public assessment data from the Gwinnett County Tax Assessors website.

3. Property Record Errors

Verify your property characteristics in the county's assessment records. Errors in square footage, bedroom count, or property classification can inflate your assessed value significantly.

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Frequently Asked Questions

What is the Gwinnett County property tax appeal deadline for 2026?

The deadline is 45 days from the date your assessment notice is mailed. Gwinnett County typically mails notices in spring, so the deadline usually falls in July or August 2026. Check your notice for the exact date.

How is Gwinnett County property assessed?

Georgia law requires residential property to be assessed at 40% of fair market value. Your assessed value should equal 40% of what your home would sell for. To find your implied market value, multiply your assessed value by 2.5.

Do I need a lawyer to appeal in Gwinnett County?

No. Gwinnett County homeowners regularly self-represent at Board of Equalization hearings. A well-prepared evidence packet with comparable sales is sufficient in most cases.

Can my taxes increase if I appeal in Georgia?

Generally no. In Georgia, the assessed value typically cannot be increased above the original notice value during the appeal process for residential properties. File with confidence.