Reference · Updated Continuously
Property tax appeal deadlines by county (2026)
Verified from official county sources and updated as counties post new cycles. 125 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.
You know the date. Do you know your number?
This table tells you when to file. It can't tell you whether your assessment is actually wrong — that takes comparing your number against real comparable sales. Enter your address and we'll check both, free, in about two minutes.
Free · no account · we never sell your address
| County | State | Appeal deadline | Time left | How to file |
|---|---|---|---|---|
| San Luis Obispo County | California | 2026-09-15 | — | Guide → |
| Waukesha County | Wisconsin | 2026-10-10 | — | Guide → |
| Providence County | Rhode Island | 2026-11-16 | 36 days | Guide → |
| Thurston County | Washington | 2026-11-16 | 36 days | Guide → |
| Butte County | California | 2026-11-30 | 50 days | Guide → |
| Contra Costa County | California | 2026-11-30 | 50 days | Guide → |
| Fresno County | California | 2026-11-30 | 50 days | Guide → |
| Kern County | California | 2026-11-30 | 50 days | Guide → |
| Los Angeles County | California | 2026-11-30 | 50 days | Guide → |
| Monterey County | California | 2026-11-30 | 50 days | Guide → |
| Orange County | California | 2026-11-30 | 50 days | Guide → |
| Riverside County | California | 2026-11-30 | 50 days | Guide → |
| Sacramento County | California | 2026-11-30 | 50 days | Guide → |
| San Bernardino County | California | 2026-11-30 | 50 days | Guide → |
| San Diego County | California | 2026-11-30 | 50 days | Guide → |
| San Joaquin County | California | 2026-11-30 | 50 days | Guide → |
| San Mateo County | California | 2026-11-30 | 50 days | Guide → |
| Santa Barbara County | California | 2026-11-30 | 50 days | Guide → |
| Solano County | California | 2026-11-30 | 50 days | Guide → |
| Sonoma County | California | 2026-11-30 | 50 days | Guide → |
| Stanislaus County | California | 2026-11-30 | 50 days | Guide → |
| Tulare County | California | 2026-11-30 | 50 days | Guide → |
| Yolo County | California | 2026-11-30 | 50 days | Guide → |
| Camden County | New Jersey | 2026-12-01 | 51 days | Guide → |
| Pinal County | Arizona | 2026-12-15 | 65 days | Guide → |
| Johnson County | Kansas | 2026-12-20 | 70 days | Guide → |
| Sedgwick County | Kansas | 2026-12-21 | 71 days | Guide → |
| Erie County | New York | 2026-12-31 | 81 days | Guide → |
| Wake County | North Carolina | 2026-12-31 | 81 days | Guide → |
| Clackamas County | Oregon | 2026-12-31 | 81 days | Guide → |
| Jackson County | Oregon | 2026-12-31 | 81 days | Guide → |
| Lane County | Oregon | 2026-12-31 | 81 days | Guide → |
| Marion County | Oregon | 2026-12-31 | 81 days | Guide → |
| Multnomah County | Oregon | 2026-12-31 | 81 days | Guide → |
| Washington County | Oregon | 2026-12-31 | 81 days | Guide → |
| Baltimore City | Maryland | 2027-01-04 | 85 days | Guide → |
| Baltimore County | Maryland | 2027-01-04 | 85 days | Guide → |
| Howard County | Maryland | 2027-01-04 | 85 days | Guide → |
| Montgomery County | Maryland | 2027-01-04 | 85 days | Guide → |
| Prince George's County | Maryland | 2027-01-04 | 85 days | Guide → |
| Honolulu County | Hawaii | 2027-01-15 | 96 days | Guide → |
| Washoe County | Nevada | 2027-01-15 | 96 days | Guide → |
| Burlington County | New Jersey | 2027-01-15 | 96 days | Guide → |
| Gloucester County | New Jersey | 2027-01-15 | 96 days | Guide → |
| Monmouth County | New Jersey | 2027-01-15 | 96 days | Guide → |
| Charleston County | South Carolina | 2027-01-15 | 96 days | Guide → |
| Horry County | South Carolina | 2027-01-15 | 96 days | Guide → |
| Cumberland County | Maine | 2027-01-19 | 100 days | Guide → |
| Middlesex County | Massachusetts | 2027-02-01 | 113 days | Guide → |
| Suffolk County | Massachusetts | 2027-02-01 | 113 days | Guide → |
| New Haven County | Connecticut | 2027-02-19 | 131 days | Guide → |
| Fairfield County | Connecticut | 2027-02-20 | 132 days | Guide → |
| Hartford County | Connecticut | 2027-02-20 | 132 days | Guide → |
| Kanawha County | West Virginia | 2027-02-20 | 132 days | Guide → |
| Hillsborough County | New Hampshire | 2027-03-01 | 141 days | Guide → |
| Nassau County | New York | 2027-03-01 | 141 days | Guide → |
| New York County | New York | 2027-03-01 | 141 days | Guide → |
| Genesee County | Michigan | 2027-03-08 | 148 days | Guide → |
| Minnehaha County | South Dakota | 2027-03-11 | 151 days | Guide → |
| New Castle County | Delaware | 2027-03-14 | 154 days | Guide → |
| Bronx County | New York | 2027-03-15 | 155 days | Guide → |
| Richmond County | New York | 2027-03-15 | 155 days | Guide → |
| Chesterfield County | Virginia | 2027-03-15 | 155 days | Guide → |
| Monroe County | New York | 2027-03-16 | 156 days | Guide → |
| Butler County | Ohio | 2027-03-31 | 171 days | Guide → |
| Cuyahoga County | Ohio | 2027-03-31 | 171 days | Guide → |
| Franklin County | Ohio | 2027-03-31 | 171 days | Guide → |
| Lorain County | Ohio | 2027-03-31 | 171 days | Guide → |
| Lucas County | Ohio | 2027-03-31 | 171 days | Guide → |
| Montgomery County | Ohio | 2027-03-31 | 171 days | Guide → |
| Stark County | Ohio | 2027-03-31 | 171 days | Guide → |
| Atlantic County | New Jersey | 2027-04-01 | 172 days | Guide → |
| Bergen County | New Jersey | 2027-04-01 | 172 days | Guide → |
| Essex County | New Jersey | 2027-04-01 | 172 days | Guide → |
| Hudson County | New Jersey | 2027-04-01 | 172 days | Guide → |
| Mercer County | New Jersey | 2027-04-01 | 172 days | Guide → |
| Middlesex County | New Jersey | 2027-04-01 | 172 days | Guide → |
| Morris County | New Jersey | 2027-04-01 | 172 days | Guide → |
| Ocean County | New Jersey | 2027-04-01 | 172 days | Guide → |
| Passaic County | New Jersey | 2027-04-01 | 172 days | Guide → |
| Union County | New Jersey | 2027-04-01 | 172 days | Guide → |
| Fairfax County | Virginia | 2027-04-01 | 172 days | Guide → |
| Henrico County | Virginia | 2027-04-01 | 172 days | Guide → |
| Oklahoma County | Oklahoma | 2027-04-05 | 176 days | Guide → |
| Tulsa County | Oklahoma | 2027-04-05 | 176 days | Guide → |
| Linn County | Iowa | 2027-04-30 | 201 days | Guide → |
| Polk County | Iowa | 2027-04-30 | 201 days | Guide → |
| Anoka County | Minnesota | 2027-04-30 | 201 days | Guide → |
| Dakota County | Minnesota | 2027-04-30 | 201 days | Guide → |
| Hennepin County | Minnesota | 2027-04-30 | 201 days | Guide → |
| Ramsey County | Minnesota | 2027-04-30 | 201 days | Guide → |
| Virginia Beach City | Virginia | 2027-04-30 | 201 days | Guide → |
| Bell County | Texas | 2027-05-17 | 218 days | Guide → |
| Cameron County | Texas | 2027-05-17 | 218 days | Guide → |
| Collin County | Texas | 2027-05-17 | 218 days | Guide → |
| Galveston County | Texas | 2027-05-17 | 218 days | Guide → |
| Webb County | Texas | 2027-05-17 | 218 days | Guide → |
| Milwaukee County | Wisconsin | 2027-05-17 | 218 days | Guide → |
| Fayette County | Kentucky | 2027-05-18 | 219 days | Guide → |
| Suffolk County | New York | 2027-05-18 | 219 days | Guide → |
| Livingston County | New York | 2027-05-25 | 226 days | Guide → |
| Onondaga County | New York | 2027-05-25 | 226 days | Guide → |
| Orange County | New York | 2027-05-25 | 226 days | Guide → |
| Rockland | New York | 2027-05-25 | 226 days | Guide → |
| Rockland County | New York | 2027-05-25 | 226 days | Guide → |
| Allen County | Indiana | 2027-06-15 | 247 days | Guide → |
| Hamilton County | Indiana | 2027-06-15 | 247 days | Guide → |
| Lake County | Indiana | 2027-06-15 | 247 days | Guide → |
| Marion County | Indiana | 2027-06-15 | 247 days | Guide → |
| Westchester County | New York | 2027-06-15 | 247 days | Guide → |
| Ada County | Idaho | 2027-06-28 | 260 days | Guide → |
| Douglas County | Nebraska | 2027-06-30 | 262 days | Guide → |
| Pierce County | Washington | 2027-07-01 | 263 days | Guide → |
| Greene County | Missouri | 2027-07-12 | 274 days | Guide → |
| St. Charles County | Missouri | 2027-07-12 | 274 days | Guide → |
| St. Louis County | Missouri | 2027-07-12 | 274 days | Guide → |
| Delaware County | Pennsylvania | 2027-08-01 | 294 days | Guide → |
| Lehigh County | Pennsylvania | 2027-08-01 | 294 days | Guide → |
| Northampton County | Pennsylvania | 2027-08-01 | 294 days | Guide → |
| Westmoreland County | Pennsylvania | 2027-08-01 | 294 days | Guide → |
| York County | Pennsylvania | 2027-08-01 | 294 days | Guide → |
| DeSoto County | Mississippi | 2027-08-02 | 295 days | Guide → |
| Hinds County | Mississippi | 2027-08-02 | 295 days | Guide → |
| Berks County | Pennsylvania | 2027-08-02 | 295 days | Guide → |
| Lancaster County | Pennsylvania | 2027-08-02 | 295 days | Guide → |
| Luzerne County | Pennsylvania | 2027-08-02 | 295 days | Guide → |
| San Luis Obispo | California | 2027-09-15 | 339 days | Guide → |
| Jefferson County | Alabama | see guide | — | Guide → |
| Madison County | Alabama | see guide | — | Guide → |
| Mobile County | Alabama | see guide | — | Guide → |
| Montgomery County | Alabama | see guide | — | Guide → |
| Maricopa County | Arizona | see guide | — | Guide → |
| Pima County | Arizona | see guide | — | Guide → |
| Pulaski County | Arkansas | see guide | — | Guide → |
| Alameda County | California | see guide | — | Guide → |
| Placer County | California | see guide | — | Guide → |
| San Francisco County | California | see guide | — | Guide → |
| Santa Clara County | California | see guide | — | Guide → |
| Ventura County | California | see guide | — | Guide → |
| Adams County | Colorado | see guide | — | Guide → |
| Arapahoe County | Colorado | see guide | — | Guide → |
| Boulder County | Colorado | see guide | — | Guide → |
| Denver County | Colorado | see guide | — | Guide → |
| Douglas County | Colorado | see guide | — | Guide → |
| El Paso County | Colorado | see guide | — | Guide → |
| Jefferson County | Colorado | see guide | — | Guide → |
| Larimer County | Colorado | see guide | — | Guide → |
| Weld County | Colorado | see guide | — | Guide → |
| Alachua County | Florida | see guide | — | Guide → |
| Brevard County | Florida | see guide | — | Guide → |
| Broward County | Florida | see guide | — | Guide → |
| Charlotte County | Florida | see guide | — | Guide → |
| Collier County | Florida | see guide | — | Guide → |
| Duval County | Florida | see guide | — | Guide → |
| Escambia County | Florida | see guide | — | Guide → |
| Hernando County | Florida | see guide | — | Guide → |
| Hillsborough County | Florida | see guide | — | Guide → |
| Lake County | Florida | see guide | — | Guide → |
| Lee County | Florida | see guide | — | Guide → |
| Leon County | Florida | see guide | — | Guide → |
| Manatee County | Florida | see guide | — | Guide → |
| Marion County | Florida | see guide | — | Guide → |
| Miami-Dade County | Florida | see guide | — | Guide → |
| Orange County | Florida | see guide | — | Guide → |
| Osceola County | Florida | see guide | — | Guide → |
| Palm Beach County | Florida | see guide | — | Guide → |
| Pasco County | Florida | see guide | — | Guide → |
| Pinellas County | Florida | see guide | — | Guide → |
| Polk County | Florida | see guide | — | Guide → |
| Sarasota County | Florida | see guide | — | Guide → |
| Seminole County | Florida | see guide | — | Guide → |
| St. Johns County | Florida | see guide | — | Guide → |
| St. Lucie County | Florida | see guide | — | Guide → |
| Volusia County | Florida | see guide | — | Guide → |
| Chatham County | Georgia | see guide | — | Guide → |
| Cherokee County | Georgia | see guide | — | Guide → |
| Clayton County | Georgia | see guide | — | Guide → |
| Cobb County | Georgia | see guide | — | Guide → |
| DeKalb County | Georgia | see guide | — | Guide → |
| Forsyth County | Georgia | see guide | — | Guide → |
| Fulton County | Georgia | see guide | — | Guide → |
| Gwinnett County | Georgia | see guide | — | Guide → |
| Henry County | Georgia | see guide | — | Guide → |
| Cook County | Illinois | see guide | — | Guide → |
| DuPage County | Illinois | see guide | — | Guide → |
| Kane County | Illinois | see guide | — | Guide → |
| Lake County | Illinois | see guide | — | Guide → |
| Madison County | Illinois | see guide | — | Guide → |
| McHenry County | Illinois | see guide | — | Guide → |
| Sangamon County | Illinois | see guide | — | Guide → |
| Will County | Illinois | see guide | — | Guide → |
| Winnebago County | Illinois | see guide | — | Guide → |
| Jefferson County | Kentucky | see guide | — | Guide → |
| Caddo Parish | Louisiana | see guide | — | Guide → |
| East Baton Rouge Parish | Louisiana | see guide | — | Guide → |
| Jefferson Parish | Louisiana | see guide | — | Guide → |
| Orleans Parish | Louisiana | see guide | — | Guide → |
| Anne Arundel County | Maryland | see guide | — | Guide → |
| Frederick County | Maryland | see guide | — | Guide → |
| Harford 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 → |
| Oakland County | Michigan | see guide | — | Guide → |
| Washtenaw County | Michigan | see guide | — | Guide → |
| Wayne County | Michigan | see guide | — | Guide → |
| Jackson County | Missouri | see guide | — | Guide → |
| Yellowstone County | Montana | see guide | — | Guide → |
| Lancaster County | Nebraska | see guide | — | Guide → |
| Clark County | Nevada | see guide | — | Guide → |
| Bernalillo County | New Mexico | 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 → |
| Mecklenburg County | North Carolina | see guide | — | Guide → |
| Cass County | North Dakota | see guide | — | Guide → |
| Hamilton County | Ohio | see guide | — | Guide → |
| Summit County | Ohio | see guide | — | Guide → |
| Allegheny County | Pennsylvania | see guide | — | Guide → |
| Bucks County | Pennsylvania | see guide | — | Guide → |
| Chester County | Pennsylvania | see guide | — | Guide → |
| Montgomery County | Pennsylvania | see guide | — | Guide → |
| Philadelphia County | Pennsylvania | see guide | — | Guide → |
| Greenville County | South Carolina | see guide | — | Guide → |
| Lexington County | South Carolina | see guide | — | Guide → |
| Richland County | South Carolina | see guide | — | Guide → |
| Spartanburg County | South Carolina | see guide | — | Guide → |
| Davidson County | Tennessee | see guide | — | Guide → |
| Hamilton County | Tennessee | see guide | — | Guide → |
| Knox County | Tennessee | see guide | — | Guide → |
| Rutherford County | Tennessee | see guide | — | Guide → |
| Shelby County | Tennessee | see guide | — | Guide → |
| Williamson County | Tennessee | see guide | — | Guide → |
| Bexar County | Texas | see guide | — | Guide → |
| Brazoria County | Texas | see guide | — | Guide → |
| Dallas County | Texas | see guide | — | Guide → |
| Denton County | Texas | see guide | — | Guide → |
| El Paso County | Texas | see guide | — | Guide → |
| Fort Bend County | Texas | see guide | — | Guide → |
| Harris County | Texas | see guide | — | Guide → |
| Hidalgo County | Texas | see guide | — | Guide → |
| Montgomery County | Texas | see guide | — | Guide → |
| Nueces County | Texas | see guide | — | Guide → |
| Tarrant County | Texas | see guide | — | Guide → |
| Travis County | Texas | see guide | — | Guide → |
| Williamson County | Texas | see guide | — | Guide → |
| Davis County | Utah | see guide | — | Guide → |
| Salt Lake County | Utah | see guide | — | Guide → |
| Utah County | Utah | see guide | — | Guide → |
| Weber County | Utah | see guide | — | Guide → |
| Chittenden County | Vermont | see guide | — | Guide → |
| Loudoun County | Virginia | see guide | — | Guide → |
| Prince William County | Virginia | see guide | — | Guide → |
| Clark County | Washington | see guide | — | Guide → |
| King County | Washington | see guide | — | Guide → |
| Kitsap County | Washington | see guide | — | Guide → |
| Snohomish County | Washington | see guide | — | Guide → |
| Spokane County | Washington | see guide | — | Guide → |
| Dane County | Wisconsin | see guide | — | Guide → |
| Laramie County | Wyoming | 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.