Cobb County Property Tax Appeal Guide
Appeal Cobb County assessments within 45 days of your notice. PT-311A filing, BOE hearing tips, and comparable sales evidence from Protestly.
Cobb County Board of Tax Assessors values Marietta, Smyrna, Kennesaw, and east Cobb subdivisions. File PT-311A within 45 days of your Annual Notice when fair market value exceeds comps.
East vs. west Cobb and townhome vs. single-family segmentation matters — BOE magistrates reject sloppy cross-market comps.
When is the Cobb County property tax appeal deadline for 2026?
45 days from notice date on 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 Board of Tax Assessors. Appeals, homestead, records.
Cobb Board of Tax Assessors
Appeals, homestead, records
How do I appeal property taxes in Cobb County?
Check fair market value and building attributes at cobbtax.org.
Review Cobb tax record
Check fair market value and building attributes at cobbtax.org.
File PT-311A
Submit within 45-day window with supporting value opinion.
BOE preparation
Marietta historic homes need different comps than Vinings new construction.
Hearing
Bring copies for board and assessor staff.
What form do I file for a Cobb Board of Tax Assessors appeal?
PT-311A (Appeal of Assessment): Cobb County appeal.
PT-311A — Appeal of Assessment
Cobb County appeal.
What happens at a Cobb County BOE hearing?
Cobb expects January 1-oriented fair market value evidence with explained adjustments.
BOE hearing
Cobb expects January 1-oriented fair market value evidence with explained adjustments.
What evidence does Cobb Board of Tax Assessors / the BOE actually use?
Geographic comps.
Geographic comps.
Equity grids.
Homestead verification.
FAQ
Cobb appeal deadline?
45 days from Annual Notice date.
File where?
Cobb Board of Tax Assessors — cobbtax.org.
Marietta city taxes?
City and county taxes use the same assessed value base.
Protestly?
Yes — $29.99 packets.
BOE location?
Confirm hearing location on your BOE notice — typically Marietta.