DeKalb County tax assessor: how assessments work and how to appeal

Last updated 2026-07-09

What does the DeKalb County tax assessor actually do?

The DeKalb County Board of Assessors estimates the fair market value of every parcel in the county, roughly 260,000 of them, then converts that estimate into an assessed value that feeds your tax bill. ^[1] The board doesn't set the millage rate. That's the job of the DeKalb County Board of Commissioners and the school board. The assessors just set the value. Your tax bill is that assessed value multiplied by the millage rate, minus any exemption credits.

Georgia law requires all real property to be assessed at 40% of its fair market value. ^[2] So if the assessor decides your house is worth $400,000 on the open market, your assessed value is $160,000. That $160,000 is what the millage rate gets applied to. Every dollar you knock off fair market value through an appeal or exemption saves you 40 cents of assessed value, and that flows straight into a lower tax bill.

The office runs out of the Maloof Administration Building at 1300 Commerce Drive, Decatur, Georgia 30030. You can reach them by phone at (404) 371-0841 or through the county's online property search portal. ^[1] When people ask why their "DeKalb county property tax" bill looks the way it does, this office is the first stop.

The board has three members appointed by the DeKalb County Grand Jury, plus a staff of appraisers who run mass appraisals using comparable sales, cost data, and income approaches. Mass appraisal is accurate on average and often wrong for individual properties. Homes with condition problems, odd lot shapes, or recent renovations that got mispriced are exactly where the model breaks. That's the opening most winning appeals exploit.

How does DeKalb County calculate your property tax assessment?

Georgia uses a three-step process. The assessor estimates fair market value (FMV) using one or more of three standard approaches: sales comparison, cost, and income. For most single-family homes, sales comparison drives the number. Appraisers pull recent sales of similar properties and adjust for differences in size, age, condition, and features. ^[2]

Then they apply the 40% assessment ratio. The Georgia Constitution sets that ratio, and it applies uniformly in every county in the state. ^[2] You can't negotiate the ratio. The only lever you have is the underlying FMV estimate.

Last, they subtract any exemptions you qualify for, which gets you to net assessed value. Multiply that by the millage rate (expressed as dollars per $1,000 of assessed value) and you have your tax before payments.

For 2024, the combined DeKalb County millage rate for unincorporated areas ran roughly 37 to 38 mills total (county operations, school, fire, and other levies), but that figure shifts by where you live because cities like Decatur, Dunwoody, Tucker, and Brookhaven levy their own rates on top of county-wide levies. ^[3] Check the specific mill rate for your parcel's taxing district. The DeKalb County Tax Commissioner publishes the breakdown on the county website. ^[4]

Here's the math on a real example: a home with a $350,000 FMV, no exemptions, in an area with a combined 37 mill rate pays roughly $350,000 × 0.40 × 0.037 = $5,180 in annual property taxes. Add a standard homestead exemption and that number drops, as the exemptions section below explains.

For a wider look at how assessment ratios and millage interact across systems, see our guide to property assessment value.

When does DeKalb County mail assessment notices, and what is the appeal deadline?

The DeKalb County Board of Assessors mails Annual Notice of Assessment (NOA) letters in spring, usually between April and June, though the exact date moves year to year depending on when the appraisal roll is finalized. ^[1]

Your deadline to appeal is 45 days from the date printed on your notice, not the date you receive it. ^[5] This is a hard cutoff under O.C.G.A. § 48-5-311. Miss it and you lose your right of appeal for that tax year. There is essentially no exception for late filing.

The table below lays out the key dates in the DeKalb County assessment calendar:

Event	Typical Timing
Assessment notices mailed	April to June
Appeal filing deadline	45 days from notice date
Board of Equalization hearings	3 to 12 months after filing
Tax bills mailed	September to October
Tax due date	December 1
Delinquent interest begins	December 2

One thing many homeowners miss: filing an appeal does not pause your tax bill. You still pay by December 1 or face penalties and interest. ^[4] Win your appeal after paying, and you get a refund. Don't wait on the appeal outcome before paying.

For a closer look at how appeal deadlines work across jurisdictions, see our article on Property tax explained: how it's set and how to appeal it.

How do you search the DeKalb County property tax assessment records?

DeKalb County's property appraisal data is publicly searchable through the Board of Assessors' online portal on the county website (dekalbcountyga.gov). ^[1] Search by parcel ID, owner name, or address. The results show the current fair market value estimate, the 40% assessed value, exemptions applied, and prior-year values.

This search is your first move before filing any appeal. Pull your record and note three things: the FMV the assessor assigned, the sales they used as comparables (sometimes listed), and whether your exemptions are showing up correctly. A missing exemption is a free win that costs nothing to fix.

The DeKalb County Tax Commissioner (a separate office from the Board of Assessors) handles billing and payments. The Tax Commissioner's pages on the county website show your current bill, payment history, and whether your property is delinquent. ^[4] The two offices are legally distinct. A question about your value goes to the assessor. A question about your bill or payment goes to the tax commissioner.

For a county-by-county look at how to find property records, see our guide to property tax records and our property tax lookup walkthrough.

What exemptions can lower your DeKalb County property tax bill?

Georgia offers a layered exemption system, and DeKalb County stacks local ones on top of the state floor. Most apply automatically once you file the first application, and they renew each year with no re-filing. Miss that first application and you've lost the money for that year, permanently.

Here are the main exemptions available to DeKalb County property owners ^[6]:

Homestead Exemption (Basic): Cuts assessed value by $10,000 for county taxes and $2,000 for school taxes. You must own and occupy the home as your primary residence as of January 1 of the tax year. File once; it renews automatically.

Senior Citizen Exemptions (various): DeKalb offers several tiers. Homeowners age 62 and older with household income under $10,000 (excluding certain retirement income) can get an exemption from all school taxes, which is a large chunk of the total bill. Homeowners 70 and older may qualify for extra county exemptions. The income thresholds and amounts change periodically, so verify with the assessor's office directly. ^[6]

Disabled Veterans Exemption: Veterans with a 100% service-connected disability can receive a large exemption on their primary residence. Surviving spouses also qualify in certain cases. The Georgia Department of Revenue administers the state portion, and DeKalb layers local credits on top. ^[7]

Conservation Use Valuation (CUVA) and Forest Land: Agricultural and forested land can qualify for current-use valuation instead of market-value assessment. This doesn't touch a typical residential parcel but matters for anyone with rural land in the county. ^[8]

The deadline to apply for exemptions in Georgia is generally April 1 of the tax year in question. ^[6] Miss the window and you can still apply, but the exemption starts the following year.

Don't confuse exemptions with appeals. An exemption cuts your taxable value by a fixed amount or formula, regardless of market conditions. An appeal argues the assessor's FMV estimate is wrong. You can do both in the same year.

How do you file a DeKalb County property tax appeal?

Georgia gives you three paths for a property tax appeal, each with its own procedure and venue ^[5]:

1. Board of Equalization (BOE): The common route for residential homeowners. You file a written appeal with the Board of Assessors within 45 days of your NOA. The case then goes to the DeKalb County Board of Equalization, a panel of three citizens who own property themselves and have completed state training. The hearing is informal. You present your evidence, the county presents theirs, and the board decides. No attorney required. This is where most DIY appeals are won or lost.

2. Hearing Officer: Available for commercial or industrial property with an FMV above $500,000, or any property above $1,000,000. ^[5] The hearing officer is an independent appraiser. Not relevant for most single-family homeowners.

3. Superior Court: Lose at the BOE and you can appeal to DeKalb County Superior Court within 30 days. Costs climb fast here. It's rarely worth it unless the dollar amount is very large. Most people stop at the BOE.

To file with the BOE, you submit an appeal form to the DeKalb County Board of Assessors. You can do it in person, by mail, or through the online portal. The form asks for your parcel ID, the value you believe is correct, and the reason (usually "value" or "uniformity"). You don't have to prove your number at this point. You just have to file on time.

After you file, the assessors' office has 180 days to either change the value (and send you a revised notice) or certify the case to the BOE. ^[5] If they certify, you get scheduled for a hearing, which can be months out. Use that time to build your evidence.

The strongest evidence packages include three to five recent sales of truly comparable homes (same neighborhood, similar size and age, sold within 12 months), your own independent appraisal if you paid for one, dated photos of condition problems the assessor may have missed, and a copy of the assessor's own comparable sales if you can get them through an open records request. The Georgia Open Records Act (O.C.G.A. § 50-18-70) gives you the right to request the appraisal card and supporting data for your property. ^[9]

At the hearing, present calmly and stay on market value. The board can't cut your value because you think taxes are too high in general. They can only act on evidence that the FMV estimate is wrong. Show them sales. Be specific. Our values assessment guide breaks down how to build a comparable sales argument step by step.

If you want a structured way to organize your evidence and filing, the TaxFightBack DIY Appeal Kit walks you through the exact documents a Georgia BOE hearing needs, so you keep 100% of whatever savings you win.

What evidence wins a DeKalb County Board of Equalization hearing?

The Board of Equalization decides on a preponderance of evidence. You don't have to prove the assessor is wildly wrong. You just have to show the more likely correct value is lower than what they assigned.

Sales comparables are the gold standard. Pull closed sales from the MLS (your real estate agent can run this for free) or from public records through the DeKalb County GIS portal or sites like Zillow and Redfin. Focus on homes that sold in the six months before January 1 of the tax year, within a half-mile of your home if you can, and within 15 to 20% of your square footage. Adjust for differences the way an appraiser would: $5 to $15 per square foot for size, meaningful amounts for garage, lot size, and condition.

If the assessor's FMV implies a price per square foot higher than what similar homes actually sold for, that gap is your argument. Put it in a one-page table and hand it to the board.

Condition evidence matters too. Deferred maintenance, a failing HVAC, a cracked foundation, water damage, or an outdated kitchen your comparables don't share can justify a downward adjustment. Dated photos beat descriptions.

For commercial property or homes worth over $750,000, get a licensed Georgia real estate appraiser's report. A residential appraisal costs $400 to $700, ^[10] and it carries real weight at the BOE because it meets USPAP standards and a licensed professional signs it. On a $500,000 home assessed $50,000 too high, that $700 appraisal could save you about $740 a year in taxes (at a 37 mill combined rate) for as long as the corrected value holds.

Uniformity is a backup argument. If neighbors with effectively identical homes are assessed at lower values, that's evidence your assessment is unequal under O.C.G.A. § 48-5-306. ^[13] Pull a few neighboring parcel records from the online search tool and compare assessed values per square foot. ^[1] This works best when the gap is obvious and the comparables are genuinely similar.

How does DeKalb County's assessment compare to similar large suburban counties?

Georgia's 40% assessment ratio is fixed statewide, so the real variables between Georgia counties are the millage rate and the accuracy of the underlying FMV estimates. DeKalb sits in a dense, fast-appreciating metro Atlanta market. Values have climbed quickly, and assessment lag (when the county's estimate trails the market on the way up) sometimes helps homeowners. It can also mean sharp catch-up increases in revaluation years.

Compare that to a few other large suburban counties. Fairfax County, Virginia (the target of many searches for "fairfax county property tax assessment" and "fairfax county property tax assessment search") assesses at 100% of FMV with no fractional ratio, and runs its own online assessment search on the county website. ^[11] Virginia also allows a longer appeal window in some circumstances than Georgia's 45-day hard cutoff. That's a structural difference worth knowing. Georgia's shorter window demands faster action.

For homeowners in other large suburban systems, our guides to montgomery county property tax and loudoun county property tax walk through the Virginia and Maryland equivalents.

DeKalb's appeal success rate isn't published in a single tidy annual report. The Georgia Department of Revenue's county digest data shows that statewide, a meaningful share of residential appeals end in value reductions. ^[12] Nobody has a precise figure for DeKalb specifically. The closest public data is the state's statistical reporting, which groups results by county in some years.

The practical point: DeKalb's mass appraisal system, like any county's, makes individual errors. The appeal process exists to correct them. Filing costs you nothing but time.

What are the most common mistakes DeKalb County homeowners make with their assessment?

Missing the 45-day deadline is the most expensive mistake, full stop. It happens because the notice arrives when people are busy, gets set aside, and the window closes before anyone acts. Set a calendar reminder the day your notice shows up.

Not checking for missing exemptions is the second-biggest miss. If you bought your home and never filed for the homestead exemption, or turned 62 and never applied for the senior exemption, you're overpaying every year by a fixed and recoverable amount. Check your assessment record online right now.

Filing an appeal with no evidence is a losing play. The board wants numbers, not complaints that taxes are too high. Show up with comparables or don't bother.

Paying a contingency firm 25% to 40% of your first year's savings when you could file yourself for free is, in my opinion, a bad trade for most homes. The BOE process is built for non-lawyers. For a straightforward residential appeal under $1 million in FMV, DIY with solid comps genuinely works.

Overlooking the tax commissioner's installment payment plan is another common error. DeKalb offers a quarterly payment option that eases cash flow even mid-appeal. ^[4]

And many homeowners don't realize the appeal covers only the year on the notice. A win in year one doesn't lock in a lower value forever. The assessor can raise the value again next year. Check your notice every spring.

How do DeKalb County property tax exemptions for seniors and veterans work in practice?

Georgia's senior exemptions are among the most generous in the South, and DeKalb County adds local layers that make the total benefit large. Here's how they work on the ground.

For the school tax exemption at age 62, the income test uses "net income" as defined by Georgia law, which excludes Social Security benefits and the first $4,000 of most retirement income. ^[6] Plenty of seniors who assume they earn too much to qualify actually fall under the threshold once those exclusions come off. The application needs a copy of your prior-year federal tax return and proof of age. Submit it to the Board of Assessors by April 1.

For disabled veterans, the key document is a VA certification of 100% service-connected disability rating. The Georgia Department of Revenue's guidance on veteran exemptions outlines the state benefit, and you apply locally through the DeKalb Board of Assessors. ^[7] The benefit can wipe out the bulk of county property taxes on a primary residence.

One practical note: if your spouse holds title to the property and you (the veteran) are not on the deed, the exemption may not apply. Get legal advice on titling if that's your situation. Georgia's rules here aren't obvious from the application forms.

If you recently became eligible (turned 62, or received a disability rating) and miss the April 1 deadline for the current year, the exemption applies starting the next tax year. That's a six- to twelve-month delay in savings. Frustrating, but it's the law as written.

For a regional comparison, see how Tennessee handles similar exemptions in our article on state of tennessee property tax assessment.

What happens after you win or lose a DeKalb County property tax appeal?

Win at the Board of Equalization and the Board of Assessors adjusts your FMV to the BOE's value. A corrected tax bill issues, and if you already paid, the county sends a refund. The new value stays on the record, but the assessor can revise it in future years through the normal appraisal cycle.

Lose at the BOE and you have 30 days to appeal to DeKalb County Superior Court. ^[5] Costs rise sharply here. Filing fees, discovery, expert witnesses, and attorney time make Superior Court appeals practical only for high-value properties or extreme errors. Most homeowners stop at the BOE.

One thing worth knowing: under O.C.G.A. § 48-5-311, if the final value differs enough from the assessor's value, the county may be liable for a portion of your appeal costs. ^[5] The specifics are technical, and a Georgia tax attorney can tell you whether it applies to your case.

For a broader picture of what comes after the appeal, see our guide on after-the-appeal topics, including refund timelines and future-year strategies.

The TaxFightBack DIY Appeal Kit includes a post-hearing checklist covering how to track your refund, when to follow up with the assessor's office, and how to set reminders for next year's notice window so you never miss a deadline again.

Frequently asked questions

What is the DeKalb County Board of Assessors phone number and address?

The DeKalb County Board of Assessors is at 1300 Commerce Drive, Decatur, Georgia 30030. The main phone number is (404) 371-0841. The office handles valuation questions, exemption applications, and appeal filings. For billing and payment questions, contact the DeKalb County Tax Commissioner separately through the county website (dekalbcountyga.gov).

How long do I have to appeal my DeKalb County property tax assessment?

You have exactly 45 days from the date printed on your Annual Notice of Assessment. This deadline comes from O.C.G.A. § 48-5-311, and there are essentially no extensions. The clock starts from the notice date, not the day you receive it. Mark your calendar the moment the notice arrives and file well before day 45.

What percentage of fair market value does DeKalb County assess property at?

DeKalb County, like every Georgia county, assesses all real property at 40% of estimated fair market value. The Georgia Constitution sets this ratio and it applies uniformly. So a home the assessor values at $400,000 has an assessed value of $160,000. Your tax bill is calculated on that $160,000 figure, minus any exemptions.

How do I search DeKalb County property tax assessment records online?

Go to the DeKalb County Board of Assessors' online portal on the county website (dekalbcountyga.gov). Search by parcel ID, owner name, or address. You'll see current and prior-year fair market values, the 40% assessed value, and any exemptions on file. It's free, public, and available around the clock. Check it every spring after notices go out.

What is the basic homestead exemption in DeKalb County?

The basic homestead exemption in DeKalb County cuts your assessed value by $10,000 for county taxes and $2,000 for school taxes. You must own and occupy the home as your primary residence as of January 1 of the tax year. Apply once by April 1 and it renews automatically. Applications go to the DeKalb County Board of Assessors.

Do I still have to pay my tax bill if I file a DeKalb County property tax appeal?

Yes. Filing an appeal does not delay your tax due date. DeKalb County tax bills are due December 1, and delinquent interest begins December 2 regardless of any pending appeal. Pay on time, then collect a refund if your appeal succeeds. The refund can take several months after a favorable BOE decision.

Can I appeal my DeKalb County assessment myself without a lawyer or agent?

Yes, and for most residential properties it makes sense to do it yourself. The Board of Equalization hearing is informal and built for non-attorneys. You need solid comparable sales data, possibly photos of condition issues, and a clear one-page summary. Contingency firms typically charge 25 to 40% of first-year savings. A successful DIY appeal keeps all of it.

What exemptions are available for DeKalb County homeowners age 62 and older?

Homeowners 62 and older with household net income under $10,000 (excluding Social Security and some retirement income) may qualify for a full exemption from school taxes in DeKalb County, which is a large share of the total bill. More county exemptions may apply at age 70. Apply by April 1 with proof of age and a copy of your prior-year federal tax return.

How does the DeKalb County Board of Equalization hearing work?

After you file an appeal, the case goes to a three-member Board of Equalization panel. The hearing is informal: you present your evidence (comparable sales, appraisal, photos), the county's staff presents theirs, and the board decides. No attorney required. Hearings usually last 15 to 30 minutes. You can appeal the board's decision to Superior Court within 30 days if you disagree.

How is the DeKalb County property tax calculated from my assessment?

Take your fair market value, multiply by 0.40 to get assessed value, subtract any exemptions, then multiply by the millage rate for your taxing district (dollars per $1,000). For 2024, combined millage rates in unincorporated DeKalb ran roughly 37 to 38 mills, though incorporated cities add their own rates. The Tax Commissioner's pages on the county website list the exact rate for each district.

What is the difference between the DeKalb County Board of Assessors and the Tax Commissioner?

The Board of Assessors estimates property values and handles exemptions and appeals. The Tax Commissioner handles billing, collections, and payments. They are legally separate offices. If you think your value is wrong, contact the assessors. If you have a payment question, billing error, or need a receipt, contact the tax commissioner. Calling the wrong office wastes time.

Can a disabled veteran get a property tax exemption in DeKalb County?

Yes. Veterans with a 100% service-connected disability rating from the VA qualify for a large exemption on their primary Georgia residence. Surviving spouses may also qualify. You apply through the DeKalb County Board of Assessors with VA certification of your disability rating. The Georgia Department of Revenue administers the state benefit guidelines.

How does DeKalb County's assessment system compare to Fairfax County, Virginia?

Fairfax County assesses at 100% of fair market value with no fractional ratio. DeKalb uses 40% of FMV under Georgia law. Virginia's appeal windows are generally longer than Georgia's hard 45-day cutoff. Both counties run online assessment search portals. The core appeal strategy (comparable sales, condition evidence) is the same in both systems, but Georgia's shorter deadline demands faster action.

Sources

1. DeKalb County Government (Board of Assessors / Property Appraisal, online parcel search): DeKalb County Board of Assessors office location at 1300 Commerce Drive, Decatur GA 30030; phone (404) 371-0841; online parcel search portal
2. Georgia Department of Revenue, Local Government Services / Property Tax Division: Georgia law requires all real property to be assessed at 40% of fair market value; three standard appraisal approaches used
3. DeKalb County Government, Budget and Finance: DeKalb County combined millage rates for various taxing districts, approximately 37-38 mills for unincorporated areas in 2024
4. DeKalb County Government, Tax Commissioner: Tax bills due December 1; delinquent interest begins December 2; quarterly installment payment option available
5. Georgia Code (Justia), O.C.G.A. § 48-5-311, Property Tax Appeals: 45-day appeal deadline from NOA date; three appeal venues (BOE, hearing officer, Superior Court); 30-day window to appeal BOE decision to Superior Court; BOE certification within 180 days; possible county liability for appeal costs
6. Georgia Department of Revenue, Property Tax Homestead and Senior Exemptions: Basic homestead exemption reduces assessed value $10,000 county / $2,000 school; senior exemption at age 62 with income under $10,000 (excluding Social Security); April 1 application deadline
7. Georgia Department of Revenue, Disabled Veterans Exemption guidance: 100% service-connected disabled veterans qualify for primary residence property tax exemption; surviving spouses may also qualify
8. Georgia Department of Revenue, Conservation Use Valuation Assessment (CUVA): Agricultural and forested land can qualify for current-use valuation under CUVA rather than market-value assessment
9. Georgia Code (Justia), O.C.G.A. § 50-18-70, Georgia Open Records Act: Georgia Open Records Act gives property owners the right to request appraisal cards and supporting data from county assessors
10. Appraisal Institute: Residential appraisal fees for single-family homes typically range from $400 to $700 depending on complexity and market
11. Fairfax County, Virginia, Real Estate Assessments (county website): Fairfax County assesses real property at 100% of fair market value; online assessment search available at county website
12. Georgia Department of Revenue, county digest and statistical reporting: Georgia DOR county digest data shows statewide assessment appeal results by county in annual statistical reporting
13. Georgia Code (Justia), O.C.G.A. § 48-5-306, Notice of Assessment / Uniformity: Uniformity of assessment is a valid ground for a property tax appeal in Georgia; assessments must be equalized across similar properties