Reference · Updated Continuously
Property tax appeal deadlines by county (2026)
Verified from official county sources and updated as counties post new cycles. 97 counties currently have verified open or upcoming windows. Miss the deadline and there's no do-over until next year — check any address free at grovehopper.com.
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| County | State | Appeal deadline | Time left | How to file |
|---|---|---|---|---|
| Pima County | Arizona | 2026-04-14 | — | Guide → |
| Bernalillo County | New Mexico | 2026-05-01 | — | Guide → |
| Mecklenburg County | North Carolina | 2026-05-04 | — | Guide → |
| Bexar County | Texas | 2026-05-15 | — | Guide → |
| Denton County | Texas | 2026-05-15 | — | Guide → |
| El Paso County | Texas | 2026-05-15 | — | Guide → |
| Fort Bend County | Texas | 2026-05-15 | — | Guide → |
| Hidalgo County | Texas | 2026-05-15 | — | Guide → |
| Montgomery County | Texas | 2026-05-15 | — | Guide → |
| Travis County | Texas | 2026-05-15 | — | Guide → |
| Williamson County | Texas | 2026-05-15 | — | Guide → |
| Jefferson County | Kentucky | 2026-05-18 | — | Guide → |
| Loudoun County | Virginia | 2026-06-01 | — | Guide → |
| Hamilton County | Tennessee | 2026-06-05 | — | Guide → |
| Denver County | Colorado | 2026-06-08 | — | Guide → |
| Larimer County | Colorado | 2026-06-08 | — | Guide → |
| Davidson County | Tennessee | 2026-06-26 | — | Guide → |
| Gwinnett County | Georgia | 2026-06-29 | — | Guide → |
| Shelby County | Tennessee | 2026-06-30 | — | Guide → |
| Clark County | Washington | 2026-07-01 | — | Guide → |
| DeKalb County | Georgia | 2026-07-13 | — | Guide → |
| Cobb County | Georgia | 2026-07-20 | — | Guide → |
| Kane County | Illinois | 2026-07-27 | — | Guide → |
| Fulton County | Georgia | 2026-07-31 | — | Guide → |
| Oakland County | Michigan | 2026-07-31 | — | Guide → |
| Wayne County | Michigan | 2026-07-31 | — | Guide → |
| Chester County | Pennsylvania | 2026-08-03 | — | Guide → |
| McHenry County | Illinois | 2026-08-06 | — | Guide → |
| Orleans Parish | Louisiana | 2026-08-20 | — | Guide → |
| Lake County | Illinois | 2026-08-24 | — | Guide → |
| Snohomish County | Washington | 2026-08-25 | — | Guide → |
| Summit County | Ohio | 2026-08-27 | 1 day | Guide → |
| Jefferson Parish | Louisiana | 2026-08-31 | 5 days | Guide → |
| Escambia County | Florida | 2026-09-02 | 7 days | Guide → |
| Winnebago County | Illinois | 2026-09-04 | 9 days | Guide → |
| Osceola County | Florida | 2026-09-08 | 13 days | Guide → |
| Leon County | Florida | 2026-09-11 | 16 days | Guide → |
| Manatee County | Florida | 2026-09-11 | 16 days | Guide → |
| Pinellas County | Florida | 2026-09-11 | 16 days | Guide → |
| Polk County | Florida | 2026-09-11 | 16 days | Guide → |
| St. Johns County | Florida | 2026-09-11 | 16 days | Guide → |
| St. Lucie County | Florida | 2026-09-11 | 16 days | Guide → |
| Volusia County | Florida | 2026-09-11 | 16 days | Guide → |
| Marion County | Florida | 2026-09-14 | 19 days | Guide → |
| Will County | Illinois | 2026-09-14 | 19 days | Guide → |
| Alameda County | California | 2026-09-15 | 20 days | Guide → |
| Placer County | California | 2026-09-15 | 20 days | Guide → |
| San Francisco County | California | 2026-09-15 | 20 days | Guide → |
| Santa Clara County | California | 2026-09-15 | 20 days | Guide → |
| Ventura County | California | 2026-09-15 | 20 days | Guide → |
| Boulder County | Colorado | 2026-09-15 | 20 days | Guide → |
| Alachua County | Florida | 2026-09-15 | 20 days | Guide → |
| Pasco County | Florida | 2026-09-15 | 20 days | Guide → |
| Salt Lake County | Utah | 2026-09-15 | 20 days | Guide → |
| Utah County | Utah | 2026-09-15 | 20 days | Guide → |
| East Baton Rouge Parish | Louisiana | 2026-09-16 | 21 days | Guide → |
| Broward County | Florida | 2026-09-18 | 23 days | Guide → |
| Collier County | Florida | 2026-09-18 | 23 days | Guide → |
| Contra Costa County | California | 2026-11-30 | 96 days | Guide → |
| Fresno County | California | 2026-11-30 | 96 days | Guide → |
| Kern County | California | 2026-11-30 | 96 days | Guide → |
| Los Angeles County | California | 2026-11-30 | 96 days | Guide → |
| Sacramento County | California | 2026-11-30 | 96 days | Guide → |
| San Bernardino County | California | 2026-11-30 | 96 days | Guide → |
| San Joaquin County | California | 2026-11-30 | 96 days | Guide → |
| San Mateo County | California | 2026-11-30 | 96 days | Guide → |
| Sonoma County | California | 2026-11-30 | 96 days | Guide → |
| Stanislaus County | California | 2026-11-30 | 96 days | Guide → |
| Camden County | New Jersey | 2026-12-01 | 97 days | Guide → |
| Pinal County | Arizona | 2026-12-15 | 111 days | Guide → |
| Johnson County | Kansas | 2026-12-20 | 116 days | Guide → |
| Erie County | New York | 2026-12-31 | 127 days | Guide → |
| Wake County | North Carolina | 2026-12-31 | 127 days | Guide → |
| Clackamas County | Oregon | 2026-12-31 | 127 days | Guide → |
| Multnomah County | Oregon | 2026-12-31 | 127 days | Guide → |
| Washington County | Oregon | 2026-12-31 | 127 days | Guide → |
| Baltimore City | Maryland | 2027-01-04 | 131 days | Guide → |
| Baltimore County | Maryland | 2027-01-04 | 131 days | Guide → |
| Howard County | Maryland | 2027-01-04 | 131 days | Guide → |
| Montgomery County | Maryland | 2027-01-04 | 131 days | Guide → |
| Prince George's County | Maryland | 2027-01-04 | 131 days | Guide → |
| Honolulu County | Hawaii | 2027-01-15 | 142 days | Guide → |
| Washoe County | Nevada | 2027-01-15 | 142 days | Guide → |
| Monmouth County | New Jersey | 2027-01-15 | 142 days | Guide → |
| Charleston County | South Carolina | 2027-01-15 | 142 days | Guide → |
| Horry County | South Carolina | 2027-01-15 | 142 days | Guide → |
| Middlesex County | Massachusetts | 2027-02-01 | 159 days | Guide → |
| Suffolk County | Massachusetts | 2027-02-01 | 159 days | Guide → |
| Nassau County | New York | 2027-03-01 | 187 days | Guide → |
| New York County | New York | 2027-03-01 | 187 days | Guide → |
| Bronx County | New York | 2027-03-15 | 201 days | Guide → |
| Richmond County | New York | 2027-03-15 | 201 days | Guide → |
| Monroe County | New York | 2027-03-16 | 202 days | Guide → |
| Cuyahoga County | Ohio | 2027-03-31 | 217 days | Guide → |
| Franklin County | Ohio | 2027-03-31 | 217 days | Guide → |
| Montgomery County | Ohio | 2027-03-31 | 217 days | Guide → |
| Bergen County | New Jersey | 2027-04-01 | 218 days | Guide → |
| Essex County | New Jersey | 2027-04-01 | 218 days | Guide → |
| Hudson County | New Jersey | 2027-04-01 | 218 days | Guide → |
| Middlesex County | New Jersey | 2027-04-01 | 218 days | Guide → |
| Morris County | New Jersey | 2027-04-01 | 218 days | Guide → |
| Ocean County | New Jersey | 2027-04-01 | 218 days | Guide → |
| Passaic County | New Jersey | 2027-04-01 | 218 days | Guide → |
| Union County | New Jersey | 2027-04-01 | 218 days | Guide → |
| Fairfax County | Virginia | 2027-04-01 | 218 days | Guide → |
| Oklahoma County | Oklahoma | 2027-04-05 | 222 days | Guide → |
| Tulsa County | Oklahoma | 2027-04-05 | 222 days | Guide → |
| Polk County | Iowa | 2027-04-30 | 247 days | Guide → |
| Dakota County | Minnesota | 2027-04-30 | 247 days | Guide → |
| Hennepin County | Minnesota | 2027-04-30 | 247 days | Guide → |
| Ramsey County | Minnesota | 2027-04-30 | 247 days | Guide → |
| Virginia Beach City | Virginia | 2027-04-30 | 247 days | Guide → |
| Collin County | Texas | 2027-05-17 | 264 days | Guide → |
| Milwaukee County | Wisconsin | 2027-05-17 | 264 days | Guide → |
| Fayette County | Kentucky | 2027-05-18 | 265 days | Guide → |
| Suffolk County | New York | 2027-05-18 | 265 days | Guide → |
| Livingston County | New York | 2027-05-25 | 272 days | Guide → |
| Onondaga County | New York | 2027-05-25 | 272 days | Guide → |
| Lake County | Indiana | 2027-06-15 | 293 days | Guide → |
| Marion County | Indiana | 2027-06-15 | 293 days | Guide → |
| Westchester County | New York | 2027-06-15 | 293 days | Guide → |
| Ada County | Idaho | 2027-06-28 | 306 days | Guide → |
| Douglas County | Nebraska | 2027-06-30 | 308 days | Guide → |
| Pierce County | Washington | 2027-07-01 | 309 days | Guide → |
| St. Charles County | Missouri | 2027-07-12 | 320 days | Guide → |
| St. Louis County | Missouri | 2027-07-12 | 320 days | Guide → |
| York County | Pennsylvania | 2027-08-01 | 340 days | Guide → |
| Lancaster County | Pennsylvania | 2027-08-02 | 341 days | Guide → |
| Jefferson County | Alabama | see guide | — | Guide → |
| Maricopa County | Arizona | see guide | — | Guide → |
| Orange County | California | see guide | — | Guide → |
| Riverside County | California | see guide | — | Guide → |
| San Diego County | California | see guide | — | Guide → |
| Adams County | Colorado | see guide | — | Guide → |
| Arapahoe County | Colorado | see guide | — | Guide → |
| Douglas County | Colorado | see guide | — | Guide → |
| El Paso County | Colorado | see guide | — | Guide → |
| Jefferson County | Colorado | see guide | — | Guide → |
| Brevard County | Florida | see guide | — | Guide → |
| Duval County | Florida | see guide | — | Guide → |
| Hillsborough County | Florida | see guide | — | Guide → |
| Lee County | Florida | see guide | — | Guide → |
| Miami-Dade County | Florida | see guide | — | Guide → |
| Orange County | Florida | see guide | — | Guide → |
| Palm Beach County | Florida | see guide | — | Guide → |
| Sarasota County | Florida | see guide | — | Guide → |
| Seminole County | Florida | see guide | — | Guide → |
| Cherokee County | Georgia | see guide | — | Guide → |
| Clayton County | Georgia | see guide | — | Guide → |
| Forsyth County | Georgia | see guide | — | Guide → |
| Cook County | Illinois | see guide | — | Guide → |
| DuPage County | Illinois | see guide | — | Guide → |
| Anne Arundel County | Maryland | see guide | — | Guide → |
| Essex County | Massachusetts | see guide | — | Guide → |
| Norfolk County | Massachusetts | see guide | — | Guide → |
| Plymouth County | Massachusetts | see guide | — | Guide → |
| Worcester County | Massachusetts | see guide | — | Guide → |
| Kent County | Michigan | see guide | — | Guide → |
| Macomb County | Michigan | see guide | — | Guide → |
| Jackson County | Missouri | see guide | — | Guide → |
| Clark County | Nevada | see guide | — | Guide → |
| Kings County | New York | see guide | — | Guide → |
| Queens County | New York | see guide | — | Guide → |
| Durham County | North Carolina | see guide | — | Guide → |
| Forsyth County | North Carolina | see guide | — | Guide → |
| Guilford County | North Carolina | see guide | — | Guide → |
| Hamilton County | Ohio | see guide | — | Guide → |
| Allegheny County | Pennsylvania | see guide | — | Guide → |
| Bucks County | Pennsylvania | see guide | — | Guide → |
| Delaware County | Pennsylvania | see guide | — | Guide → |
| Montgomery County | Pennsylvania | see guide | — | Guide → |
| Philadelphia County | Pennsylvania | see guide | — | Guide → |
| Greenville County | South Carolina | see guide | — | Guide → |
| Knox County | Tennessee | see guide | — | Guide → |
| Dallas County | Texas | see guide | — | Guide → |
| Harris County | Texas | see guide | — | Guide → |
| Tarrant County | Texas | see guide | — | Guide → |
| Prince William County | Virginia | see guide | — | Guide → |
| King County | Washington | see guide | — | Guide → |
| Spokane County | Washington | see guide | — | Guide → |
| Dane County | Wisconsin | see guide | — | Guide → |
Sourced from official county assessor and appeal-board publications; each county guide links its sources. Deadlines can change — always confirm with the county before relying on a date. Journalists and bloggers: you're welcome to cite this table with a link. New counties are added daily.