DeKalb County is one of Atlanta's most diverse and dynamic suburban counties âÃÂàhome to Decatur, Tucker, Stone Mountain, Dunwoody, Brookhaven, and dozens of distinct neighborhoods with dramatically different market characteristics. The DeKalb County Board of Tax Assessors values property at 40% of estimated fair market value under Georgia law, applying mass-appraisal models to a county where neighborhood-level variation is extreme. The result: many DeKalb County homeowners are assessed above their property's actual fair market value. Georgia law gives you exactly 45 days from your assessment notice to appeal. Here's everything you need to know.
How DeKalb County Assesses Your Property
The DeKalb County Board of Tax Assessors uses mass-appraisal methodology to value all residential property in the county annually. Georgia law requires assessment at 40% of fair market value âÃÂàmeaning if your home's market value is estimated at $400,000, your assessed value should be $160,000, and your taxes are calculated on that figure. DeKalb County's diverse housing stock presents particular challenges for mass appraisal: intown neighborhoods with historic homes, midcentury ranch suburbs, newer construction in Dunwoody and Brookhaven, and rural pockets all require different valuation approaches. When the model applies broad averages to specific properties, errors are common âÃÂàand most errors run in the assessor's favor.
DeKalb County 2026 Appeal Deadline: 45 Days
Under O.C.G.A. ÃÂç 48-5-311, you have exactly 45 days from the date on your Notice of Assessment to file an appeal with the DeKalb County Board of Tax Assessors. DeKalb County typically mails assessment notices between April and June. The 45-day window is strict âÃÂàmissing it means waiting until next year.
- ✓45-day window starts from the date ON your notice âÃÂànot when you received it
- ✓Assessment notices typically mailed AprilâÃÂÃÂJune in DeKalb County
- ✓DeKalb County Board of Tax Assessors: 4380 Memorial Drive, Decatur, GA 30032
- ✓Appeals can be filed by mail, in person, or via county online portal
- ✓TaxAppeal files via USPS certified mail âÃÂàdocumented postmark proof
DeKalb County Market Context for 2026
DeKalb County's intown neighborhoods âÃÂàDecatur, Kirkwood, East Atlanta, Candler Park, Lake Claire âÃÂàhave seen significant appreciation driven by proximity to Atlanta employment centers and urban amenity demand. Meanwhile, outer DeKalb communities have had more modest growth. The county's mass-appraisal system struggles to capture this geographic variation accurately. Intown properties may be over-assessed due to model overreach; outer county properties may be over-assessed due to stale comparable data. Either way, if recent sales of comparable homes support a lower value, you have a strong appeal.
Legal Grounds for a DeKalb County Appeal
Georgia law provides several grounds for a property tax appeal. The most common and effective for residential homeowners is a fair market value appeal.
- ✓Fair market value: Your home's actual market value is lower than the county's estimate
- ✓Assessment ratio: The 40% ratio was applied to an inflated market value estimate
- ✓Uniformity: Your property is assessed at a higher ratio than comparable properties in the county
- ✓Exemption denial: A homestead or other exemption was improperly denied or not applied
Evidence That Works in DeKalb County Appeals
The DeKalb County Board of Tax Assessors responds to comparable sales evidence âÃÂàrecent sales of similar properties in your area that sold for less than the county's fair market value estimate for your property.
- ✓Comparable sales: Recent closed sales of similar homes in your neighborhood below the county's market value estimate
- ✓Property condition: Foundation issues, roof age and condition, HVAC system age, deferred maintenance
- ✓Location factors: Traffic noise, commercial adjacency, school zone changes, crime patterns
- ✓Assessment record errors: Wrong square footage, finished basement status, bedroom count, lot size
- ✓Neighborhood market data: Evidence of softening values in your specific area
The DeKalb County Appeal Process
After filing your appeal, the DeKalb County Board of Tax Assessors will first conduct an internal review. If they offer a reduction you find acceptable, you can settle at this stage. If not, your appeal proceeds to the Board of Equalization âÃÂàan independent three-member panel that holds a formal hearing and issues a binding decision. If you disagree with the BOE's decision, you can appeal further to Superior Court. TaxAppeal prepares letters structured to be persuasive at the initial BOA review stage, maximizing the chance of settlement without a formal hearing.
Frequently Asked Questions
What is the DeKalb County property tax appeal deadline for 2026? ▾
You have 45 days from the date printed on your Notice of Assessment. DeKalb County mails notices between April and June, so deadlines typically fall between late May and late July.
Where do I file a DeKalb County property tax appeal? ▾
With the DeKalb County Board of Tax Assessors at 4380 Memorial Drive, Decatur, GA 30032, online via the county portal, or by certified mail. TaxAppeal files on your behalf.
Does TaxAppeal serve Dunwoody, Brookhaven, and Decatur? ▾
Yes. TaxAppeal serves all DeKalb County cities and communities including Decatur, Tucker, Stone Mountain, Dunwoody, Brookhaven, Avondale Estates, Clarkston, Lithonia, and all unincorporated DeKalb County areas.
Can my DeKalb County assessment increase if I appeal? ▾
In rare cases yes, as Georgia doesn't prohibit assessment increases from appeals. TaxAppeal reviews all market data before filing to ensure your appeal is well-supported, minimizing this risk.
How does Dunwoody's incorporation affect my property tax appeal? ▾
Dunwoody is a city within DeKalb County. Your property is still valued by the DeKalb County Board of Tax Assessors regardless of city incorporation. City taxes are levied by the City of Dunwoody on top of county taxes.
How much can I save from a successful DeKalb County appeal? ▾
The average successful DeKalb County appeal saves $1,200âÃÂÃÂ$2,000 per year depending on the gap between assessed fair market value and actual market value.