Think your property is overvalued? Appeal deadlines by state

Most places give owners only a few weeks after the assessment notice to appeal. Here are the deadlines and steps for each state, and for large counties where they set their own, from the statute or the agency.

This site is growing. New records are added every day once they are checked against official sources. 24 counties published so far.


Arizona	Arizona	Within sixty days after the date the assessor mailed the notice of valuation.
California	California	Regular filing period is July 2 to September 15. If assessment notices are not given by August 1, the last day is extended to November 30.
Colorado	Colorado	Appeal a Notice of Value directly to the county assessor by June 8.
Florida	Florida	For valuation issues, a petition to the value adjustment board may be filed on or before the 25th day after the property appraiser mails the notice.
Georgia	Georgia	Within 45 days of the date the Assessment Notice was mailed.
Cook County, Illinois	Illinois	Typically 30 days after you receive your reassessment notice. The last date to file is printed on your notice.
Indiana	Indiana	June 15 of the assessment year if the Form 11 notice is mailed before May 1. Otherwise June 15 of the year the tax bill is mailed.
Maryland	Maryland	Appeals must be filed within 45 days of the reassessment notice date. Without a notice, a petition for review is due by the first working day following January 1.
Massachusetts	Massachusetts	By the due date of the first installment of the actual tax bill. Generally February 1 for quarterly billing, or 30 days after mailing for twice yearly billing.
Michigan	Michigan	Protest to the local March Board of Review. Residential appeals then go to the Michigan Tax Tribunal by July 31. Commercial and industrial may go directly by May 31.
Minnesota	Minnesota	Local Board of Appeal and Equalization meetings run April 1 to May 31, county board meetings in June. Tax Court appeals are due April 30 of the following year.
Missouri	Missouri	Appeals shall be lodged with the county board of equalization on or before the second Monday in July.
New Jersey	New Jersey	Appeals must be filed and received on or before April 1. May 1 where a municipal revaluation or reassessment has been done.
New York	New York	Grievance Day. In most communities it is the fourth Tuesday in May. Confirm the date with your assessor or municipal clerk.
New York City	New York	Complaints must be filed by March 15 for Class One properties and by March 1 for all other properties.
North Carolina	North Carolina	A hearing request must be made in writing or in person before the county board of equalization and review adjourns. Each county sets its own dates.
Ohio	Ohio	A complaint must be filed with the county auditor on or before March 31 of the ensuing tax year, or the first half tax collection closing date if later.
Oregon	Oregon	After tax statements are mailed and by December 31, or the next business day if December 31 falls on a weekend or holiday.
Philadelphia County, Pennsylvania	Pennsylvania	For tax year 2027, appeals must be filed no later than Monday, October 5, 2026.
South Carolina	South Carolina	Within ninety days after the assessor mails the property tax assessment notice. Without a notice, you may appeal at any time.
Tennessee	Tennessee	Appeal first to the county board of equalization. State Board appeals are due August 1 of the tax year or 45 days after the county board notice, if later.
Texas	Texas	In most cases, May 15 or 30 days from the appraisal district notice delivery date, whichever is later.
Washington	Washington	July 1 of the assessment year, or 30 days after the notice was mailed or sent, or up to 60 days if the county adopts it, whichever is later.
Wisconsin	Wisconsin	Give the board of review clerk written or oral notice of intent to object at least 48 hours before the board's first scheduled meeting.