Cobb County Property Tax Appeal (Marietta & Vinings)

Appeal Cobb County property taxes within 45 days. PT-311A, two-copy BOE evidence packet, Marietta / Kennesaw / Vinings comps, assessor conference + BOE tips, $29.99 Protestly packet.

Cobb County Board of Tax Assessors values Marietta, Smyrna, Kennesaw, Acworth, and east and west Cobb subdivisions along I-75 and I-285. Your Annual Notice of Assessment sets fair market value — file Form PT-311A within 45 days when that value exceeds market evidence.

Cobb County is not one market. Vinings townhomes, Marietta historic bungalows, Kennesaw new construction, and west Cobb ranch stock rarely share buyers. BOE magistrates reject sloppy cross-market comps — lead with January 1 fair market value segmented by product type and geography.

Cherokee and Fulton spillover can inflate values near the county line, but an east Cobb ranch is not automatically comparable to a Buckhead listing just because both sit inside the Perimeter. File on time, then present Cobb County comps with a clear adjustment grid.

Cobb County assessor staff often schedule an informal conference after PT-311A is filed. Treat it as negotiation, not a courtesy call: arrive with Vinings / Marietta / Kennesaw comps tied to your notice date, a one-page map, and a single fair market value ask. Many Perimeter-adjacent appeals close at this step when owners show product-type equity — reserve BOE time for cases where staff will not move off bulk appraisal models.

When the Cobb Board of Equalization sets a hearing date, use the same printed evidence packet from the assessor conference: two copies of your comp map, Vinings / Marietta / Kennesaw comps, and a one-page January 1 fair market value conclusion. Cobb BOE panels expect organized paper packets — not last-minute phone photos.

When is the Cobb County property tax appeal deadline for 2026?

45 days from the date on your Annual Notice of Assessment.

Georgia law generally gives you 45 days from the date of your Annual Notice of Assessment to file an appeal with the Board of Tax Assessors.

If you disagree after the assessors review your appeal, you may continue to a hearing before the Board of Equalization (BOE).

Who do I file a Cobb County appeal with?

File your Cobb County appeal with Cobb County Board of Tax Assessors. PT-311A filing, homestead, property records.

Cobb County Board of Tax Assessors

PT-311A filing, homestead, property records

Cobb Board of Equalization

BOE hearings after assessor-level review

How do I appeal property taxes in Cobb County?

Check fair market value, 40% assessed value, homestead status, and building attributes at cobbtax.org.

Review your Cobb County tax record

Check fair market value, 40% assessed value, homestead status, and building attributes at cobbtax.org.

File Form PT-311A within 45 days

Submit proposed value and grounds to Cobb Board of Tax Assessors; keep proof of delivery.

Segment Vinings / Marietta / Kennesaw comps

Marietta historic homes need different comps than Vinings townhomes or Kennesaw new phases — do not blend without adjustments.

Assemble a two-copy BOE evidence packet

Print two copies of your comp map, three adjusted Cobb County sales in your submarket, your PT-311A filing receipt, and a one-page January 1 fair market value conclusion for the assessor conference and the Cobb Board of Equalization.

Attend assessor conference or BOE hearing

Many Cobb appeals resolve before BOE when packets include a map, adjustment grid, and clear January 1 value conclusion at the assessor conference. If staff will not adjust, present the same printed evidence to the Cobb Board of Equalization on your scheduled hearing date.

What form do I file for a Cobb County Board of Tax Assessors appeal?

PT-311A (Appeal of Assessment): Standard Georgia appeal form for Cobb County residential property.

PT-311A — Appeal of Assessment

Standard Georgia appeal form for Cobb County residential property.

What happens at a Cobb County BOE hearing?

Cobb County BOE panels work from printed packets. Arrive with two copies, open with your concluded January 1 fair market value, and walk two or three best adjusted comps — Vinings townhomes and Marietta historic bungalows need separate product pools.

Assessor conference

Cobb assessor staff frequently offer an informal conference after PT-311A is filed. Bring two copies of your comp map, three adjusted sales in your submarket, and a one-page fair market value conclusion. Outcomes vary — if the conference does not resolve the gap, the same packet structure works at BOE.

BOE evidence packet at hearing

Cobb County BOE panels work from printed packets. Arrive with two copies, open with your concluded January 1 fair market value, and walk two or three best adjusted comps — Vinings townhomes and Marietta historic bungalows need separate product pools.

BOE hearing format

Cobb BOE panels expect January 1-oriented fair market value evidence with explained adjustments — lead with comps, then explain 40% assessed value implications.

East vs. west Cobb

East Cobb’s established subdivisions and west Cobb’s mixed stock behave as separate Cobb County submarkets — match city and build era before using cross-market sales.

What evidence does Cobb County Board of Tax Assessors / the BOE actually use?

Comparable sales adjusted to notice-date fair market value inside your Cobb County submarket.

Comparable sales adjusted to notice-date fair market value inside your Cobb County submarket.

Equity grids when similar Cobb County homes show lower fair market value on the roll.

Homestead and senior exemption documentation when errors inflate taxable value.

A one-page market-value conclusion before assessor conference or BOE.

FAQ

Cobb County appeal deadline?

45 days from your Annual Notice of Assessment date — confirm the date printed on your notice.

Where do I file PT-311A in Cobb County?

Cobb Board of Tax Assessors — cobbtax.org for current filing instructions.

Marietta city taxes?

City and county taxes use the same assessed value base — appeal lowers both.

BOE location in Cobb?

Confirm hearing location on your BOE notice — typically Marietta.

Does Protestly help Cobb County owners?

Yes — $29.99 comparable sales packets for BOE hearings.

What should I bring to a Cobb County BOE hearing?

Two printed copies of your comp map, three adjusted sales in your Cobb submarket, your PT-311A filing receipt, and a one-page January 1 fair market value conclusion — the same packet you used at the assessor conference when that meeting occurred.