How to Appeal Property Taxes in DeKalb County, Georgia (2026 Guide)

Direct answer: DeKalb County’s 2026 real-property assessment notices were dated May 29, 2026, making the 45-day appeal deadline Monday, July 13, 2026. As of July 16, 2026, the regular 2026 window has closed unless you received a later corrected/supplemental notice with its own deadline.

File with the DeKalb County Board of Assessors / Property Appraisal Department, not the Tax Commissioner and not the Georgia Department of Revenue. The county’s appeal address is DeKalb County Property Appraisal Department, 325 Swanton Way, Decatur, GA 30030; online filing is through the DeKalb property search/SmartFile portal using the access code on your assessment notice.

How assessments work in DeKalb County

DeKalb appraises real property annually at fair market value as of January 1. For homeowners, the county says the primary method is the market/sales comparison approach, supported by its computer-assisted mass appraisal system, which uses sales data, market trends, permits, improvements, property characteristics, measurements, zoning, and land-use restrictions.

Your tax is not based directly on the full market value. Georgia’s assessment ratio is 40%, so a $500,000 fair market value becomes a $200,000 assessed value before exemptions. The tax bill is then calculated by subtracting exemptions from assessed value and multiplying by the applicable millage rates for your tax district.

For 2026, DeKalb’s countywide county operations/hospital M&O rate was set as part of the county’s July 7, 2026 millage action, and the public presentation lists an unincorporated county total of 21.310 mills. Add the DeKalb County School District rate of 22.780 mills for a basic unincorporated, non-city example: about 44.090 mills before any city, CID, sanitation, stormwater, or other special charges.

Whether you should appeal

Appeal if you can show the county’s value is too high as of January 1, 2026. The strongest evidence is usually: (1) sales of similar nearby homes before January 1, adjusted for size/condition; (2) an arm’s-length purchase of your own home near January 1; (3) wrong property data, such as square footage, basement finish, condition, bathrooms, or land size; or (4) uniformity evidence showing comparable homes are assessed lower.

A practical test: calculate whether the likely reduction is worth the work. Example: your DeKalb notice says $500,000, but three good comparable sales support $450,000. The value reduction is $50,000; at Georgia’s 40% assessment ratio, taxable assessed value falls by $20,000. Using the 2026 unincorporated DeKalb + DeKalb Schools example rate of 44.090 mills, estimated savings are $20,000 × 0.04409 = $881.80 for the year, before homestead/EHOST effects and before fixed fees like sanitation. If you have homestead, EHOST credits can reduce the county portion, so your actual dollar savings may be lower, but school-tax savings can still be meaningful.

I did not find an official DeKalb-published countywide appeal success rate or median reduction. DeKalb’s property portal shows individual appeal histories, statuses, hearing dates, and decision forms, but not an aggregate homeowner win-rate report.

Step-by-step how to file

1. Find the deadline on your notice. For regular 2026 real-property notices, DeKalb notices show May 29, 2026 and July 13, 2026. Georgia’s rule is 45 days from the assessment notice date.

2. Use the right form or letter. The official state form is PT-311A, Appeal of Assessment Form. DeKalb also accepts a written appeal letter. Your filing should include parcel ID, property address, daytime phone number, reason for appeal, supporting documentation, your asserted value, and your chosen appeal route: Board of Equalization, Hearing Officer, or Nonbinding Arbitration. If an agent signs, include a letter of authorization.

3. Choose the appeal route. Most homeowners should choose Board of Equalization (BOE). It is free and available for value, uniformity, taxability, and exemption-denial issues. Hearing Officer is generally for non-homestead real property, or wireless personal property, with fair market value over $500,000 and value/uniformity issues. Nonbinding Arbitration is for value only, requires a certified appraisal at your expense, and DeKalb lists a $217 filing fee.

4. File online if you can. Go to DeKalb’s property search, find your parcel, click the online appeal option, and enter the last eight digits of the 10-digit access code printed on your notice. Save the confirmation page/email; that is your proof.

5. Or file by mail/hand delivery. Mail or hand-deliver to: DeKalb County Property Appraisal Department, 325 Swanton Way, Decatur, GA 30030. DeKalb says the appeal must be hand-delivered or postmarked by the U.S. Postal Service by the deadline. Office hours listed for appeal filing are 8:30 a.m. to 5:00 p.m., Monday–Friday except legal holidays.

6. Do not email or fax it. DeKalb’s online appeal instructions state plainly: faxed or emailed appeals are not accepted. If the website is down near the deadline, that does not extend the deadline; mail or hand-deliver instead.

What happens after

The first review is by the DeKalb County Board of Assessors. The appraisal staff may agree to a change, issue a no-change notice, or move the appeal forward. Georgia law allows the assessors a review period; DeKalb publicly noted that, for 2025 appeals, it received enough appeals to qualify for an additional 180 days. In plain English: expect months, not days, especially in high-appeal years.

If you continue to the DeKalb County Board of Equalization, your case goes to a three-member panel of trained property owners. BOE hearings are evidence-based but not as formal as court. The county/appraiser presents its value evidence, you present your evidence, and the board decides value, uniformity, taxability, or exemption issues. Georgia BOE rules allow documentary evidence, and parties can request witness names and documents before the hearing.

A written decision follows. If you still disagree, Georgia law generally gives you 30 days from the BOE, hearing officer, or arbitrator decision to appeal to Superior Court. DeKalb lists a $25 Superior Court appeal fee.

If your appeal is still unresolved when bills are mailed, DeKalb bills a temporary value. The Tax Commissioner explains that the default is usually the lesser of the last final value or 85% of the current value, unless you elect 100% of the current value. Any final difference is refunded or billed later with interest rules.

Local tips

Check exemptions before obsessing over millage. DeKalb’s basic homestead exemption requires you to own and occupy the property as your primary residence as of January 1, register vehicles at that address, use a Georgia ID/driver’s license showing the property, file income taxes from the property, and not claim homestead elsewhere. DeKalb also has senior/disability exemptions such as H4, H6, H8, and H9, plus disabled-veteran/spousal exemptions. The 2026 special homestead online application page listed July 13, 2026 as the current-year special exemption deadline.

EHOST matters in DeKalb. For 2026, county budget materials say the EHOST credit is 84.56% of taxes due to the County Operations and Hospital millage after other exemptions, with an additional unincorporated credit of 9.74% of police services tax. That makes homestead status especially valuable.

Finally, appeal value—not your tax bill. BOE members cannot lower school millage, city millage, sanitation, or stormwater charges. Your job is to prove the January 1 market value or uniformity is wrong, using DeKalb parcel records and comparable sales that look like your home, not generic Zillow screenshots.