Gwinnett County Property Tax Appeal: How to Do It Yourself
If your Gwinnett County assessment notice shows a value that seems too high, you can appeal it — free, on your own, without hiring a company. The Board of Assessors handles valuations; the Board of Equalization hears appeals. This guide covers the grounds for appeal, how to file, and what evidence actually helps.
Grounds for Appeal: What You Can Actually Argue
Georgia law recognizes three grounds for a property tax appeal. Most homeowners use one or more of these:
- Value: the assessed value exceeds what your property would realistically sell for on the open market — the most common ground, supported by recent comparable sales of similar nearby homes that sold for less. See also: Property Tax Protest Tarrant County and Property Tax Protest Dallas Texas.
- Uniformity: your property is assessed at a higher ratio to market value than comparable properties in the county — neighbors with similar homes assessed lower supports a reduction. See also: Fort Bend County Property Tax Protest and Property Tax Protest Dallas Texas.
- Taxability: the property (or a portion of it) should not be subject to taxation — less common for standard residential homes, but relevant for certain exemptions or property types.
You can raise value and uniformity on the same appeal. Most homeowners filing on their own focus on value, backed by comparable sales.
How to File Your Appeal
Gwinnett County accepts appeals by mail and in person at the Board of Assessors office. Under Georgia law, you have 45 days from the date on your notice — miss that window and you lose your opportunity for that tax year. Your appeal must state the grounds you are using and your opinion of the correct value; you cannot simply say the value is too high without providing a number. The appeal form is at gwinnettcounty.com — confirm the current deadline there before filing, and keep a copy with your confirmation.
After filing, the Board of Assessors may review your appeal and offer an adjusted value before a BOE hearing is scheduled. Many appeals resolve at this informal stage. If you reject the adjustment or the Board does not change its value, your case proceeds to the BOE.
Evidence That Moves the Board of Equalization
Print everything — the BOE panel will not scroll through your phone. The most useful evidence for a residential value appeal:
- Three to five comparable sales from the past 12 months: homes similar in size, age, condition, and location that sold below the assessed value, pulled from public deed records, Zillow, or Redfin. See also: Denton County Property Tax Protest and Bexar County Property Tax Protest.
- A recent independent appraisal from a refinance or purchase carries real weight if the appraised value is below the assessment. See also: Property Tax Protest Dallas Texas.
- Photos and repair estimates for condition problems the assessor may not know about: roof damage, foundation issues, HVAC age, water intrusion. The assessor typically values from the exterior and public records, so interior condition evidence can shift the number.
- For a uniformity argument: assessed values per square foot for comparable neighboring properties, pulled from Gwinnett County's public property records. A simple spreadsheet showing your per-square-foot figure versus neighbors is enough.
A reduction is not guaranteed — it depends on how well your evidence lines up with market data and the BOE panel's judgment. Strong, recent comps are the most reliable path. See also: Property Tax Protest Tarrant County.
Appealing in Neighboring Georgia Counties
Georgia uses the same Board of Equalization framework statewide, but each county's assessor has its own portal, forms, and notice schedule. If you own property in a neighboring county, see the guide for DeKalb County property tax appeal or Fulton County property tax appeal — the grounds are the same, but filing steps and deadlines differ by county.