New York Property Tax Appeal Guides
Browse source-reviewed property tax appeal guides for New York. County deadlines, filing methods, and available records can differ by county and tax year.
Each published guide identifies the public sources used for its deadline and filing summary. Confirm current requirements with the official filing authority before submitting anything.
Allegany County: 2026 deadline guidance is 2026 ordinary local grievance windows are closed; verify the town calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/allegany-county
Broome County: 2026 deadline guidance is 2026 regular grievance window closed: May 26. Guide: https://fairpath.app/property-tax-appeal/new-york/broome-county
Cattaraugus County: 2026 deadline guidance is 2026 ordinary municipal grievance windows are closed; verify the local Board date. Guide: https://fairpath.app/property-tax-appeal/new-york/cattaraugus-county
Chautauqua County: 2026 deadline guidance is 2026 local grievance windows are closed; verify the 2027 municipal calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/chautauqua-county
Chemung County: 2026 deadline guidance is 2026 local grievance windows are closed; verify the 2027 city, town, or village calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/chemung-county
Cortland County: 2026 deadline guidance is 2026 ordinary grievance window closed May 26; verify the 2027 local calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/cortland-county
Erie County: 2026 deadline guidance is 2026 local grievance windows are closed; verify the 2027 city or town calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/erie-county
Genesee County: 2026 deadline guidance is The filing date is assessing-unit specific; verify the current city or town calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/genesee-county
Kings County: 2026 deadline guidance is 2026/27 deadline passed: March 16 for Class 1; March 2 for Classes 2, 3, and 4. Guide: https://fairpath.app/property-tax-appeal/new-york/kings-county
Livingston County: 2026 deadline guidance is 2026 town grievance windows are closed; verify the 2027 town schedule. Guide: https://fairpath.app/property-tax-appeal/new-york/livingston-county
Monroe County: 2026 deadline guidance is 2026 closed: March 17 in Rochester; May 26 in most towns. Guide: https://fairpath.app/property-tax-appeal/new-york/monroe-county
Montgomery County: 2026 deadline guidance is 2026 windows are closed; City of Amsterdam used January while towns used May or June dates. Guide: https://fairpath.app/property-tax-appeal/new-york/montgomery-county
Nassau County: 2026 deadline guidance is March 31, 2026 for the 2027/28 tentative assessment. Guide: https://fairpath.app/property-tax-appeal/new-york/nassau-county
New York County: 2026 deadline guidance is 2026/27 deadline passed: March 16 for Class 1; March 2 for Classes 2, 3, and 4. Guide: https://fairpath.app/property-tax-appeal/new-york/new-york-county
Niagara County: 2026 deadline guidance is 2026 local grievance windows are closed; verify the 2027 municipal calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/niagara-county
Oneida County: 2026 deadline guidance is 2026 local grievance windows are closed; verify the 2027 city or town calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/oneida-county
Onondaga County: 2026 deadline guidance is 2026 closed: May 26 in most towns; Syracuse used a separate January period. Guide: https://fairpath.app/property-tax-appeal/new-york/onondaga-county
Orleans County: 2026 deadline guidance is 2026 ordinary local grievance windows are closed; verify the town or village calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/orleans-county
Oswego County: 2026 deadline guidance is 2026 local grievance windows are closed; verify the 2027 municipal calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/oswego-county
Putnam County: 2026 deadline guidance is 2026 town grievance windows are closed; verify the 2027 local calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/putnam-county
Schenectady County: 2026 deadline guidance is 2026 local grievance windows are closed; verify the 2027 city or town calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/schenectady-county
St. Lawrence County: 2026 deadline guidance is 2026 municipal grievance windows are closed; verify the 2027 county schedule and local notice. Guide: https://fairpath.app/property-tax-appeal/new-york/st-lawrence-county
Steuben County: 2026 deadline guidance is 2026 local grievance windows are closed; verify the 2027 municipal calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/steuben-county
Suffolk County: 2026 deadline guidance is 2026 ordinary town windows are closed; verify the exact town and village calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/suffolk-county
Wayne County: 2026 deadline guidance is 2026 local grievance windows are closed; verify the 2027 town or village calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/wayne-county
Westchester County: 2026 deadline guidance is 2026 local grievance windows are closed; verify the 2027 municipal calendar. Guide: https://fairpath.app/property-tax-appeal/new-york/westchester-county
Source: Allegany County, Real Property Tax Services, https://www.alleganyco.gov/departments/real-property/. Reviewed 2026-08-09.
Source: Allegany County Clerk, Recording Fees, https://www.alleganyco.gov/departments/county-clerk/recording-fees/. Reviewed 2026-08-09.
Source: Broome County Real Property Tax Services, Real Property Tax Calendar, https://www.broomecountyny.gov/realprop/calendar. Reviewed 2026-07-29.
Source: Broome County, New York, Real Property Tax Services, https://www.broomecountyny.gov/realprop/. Reviewed 2026-07-29.
Source: Cattaraugus County, Parcel Map Disclaimer, https://maps.cattco.org/parcel_disclaimer.php. Reviewed 2026-08-09.
Source: Cattaraugus County Real Property and GIS, Disagree with Your Assessment, https://www.cattco.gov/real-property-and-gis/disagree-assessment. Reviewed 2026-08-09.
Source: Cattaraugus County Treasurer's Office, Taxpayer's Guide to Cattaraugus County Tax Information, https://cattco.com/treasurers-office/taxpayers-guide-cattaraugus-county-tax-information. Reviewed 2026-08-09.
Source: Chautauqua County, Geographic Information Systems, https://chautauquacountyny.gov/information-services/Geographic-Information-Systems. Reviewed 2026-08-09.
Source: Chautauqua County, Real Property Tax, https://chautauquacountyny.gov/real-property-tax/Real-Property-Tax. Reviewed 2026-08-09.
Source: Chemung County, Assessment Roll Archive, https://chemungcountyny.gov/Archive.aspx?AMID=42. Reviewed 2026-08-09.
Source: Chemung County, Real Property Tax Services, https://www.chemungcountyny.gov/441/Real-Property-Tax-Services. Reviewed 2026-08-09.
Source: City of Binghamton Department of Assessment, 2026 Assessment Grievance, https://www.binghamton-ny.gov/government/departments/assessment-grievance. Reviewed 2026-07-29.
Source: City of Buffalo, 2026 Complaint on Real Property Assessment, https://www.buffalony.gov/DocumentCenter/View/15554/RP-524-GRIEVANCE-FORM-2026. Reviewed 2026-08-09.
Source: City of New York, NYC Open Data FAQ, https://opendata.cityofnewyork.us/faq/. Reviewed 2026-08-09.
Source: City of Olean Assessor's Office, Grievance Information, https://cityofolean.gov/departments/assessor/grievance_info/. Reviewed 2026-08-09.
Source: City of Oneida, Madison County, Assessor, https://www.oneidacityny.gov/departments/assessor/index.php. Reviewed 2026-08-09.
Source: City of Oswego, Assessment Department, https://www.oswegony.gov/departments/assessment.php. Reviewed 2026-08-09.
Source: City of Peekskill, Assessment Roll Dates, https://www.cityofpeekskillny.gov/192/Assessment-Roll-Dates. Reviewed 2026-08-09.
Source: City of Rochester Bureau of Assessment, Contesting an Assessment, https://www.cityofrochester.gov/departments/finance-department/contesting-assessment. Reviewed 2026-07-29.
Source: City of Schenectady, Assessment Process, https://www.cityofschenectady.gov/175/Assessment-Process. Reviewed 2026-08-09.
Source: City of Syracuse, Board of Assessment Review, https://www.syr.gov/Boards-and-Commissions/Municipal-Boards/BAR. Reviewed 2026-08-08.
Source: Cortland County, 2026 Tentative Assessment Rolls, https://cortlandcountyny.gov/1272/2026-Tentative-Assessment-Rolls. Reviewed 2026-08-09.
Source: Cortland County, Key Assessment Dates, https://www.cortlandcountyny.gov/217/Key-Assessment-Dates. Reviewed 2026-08-09.
Source: Cortland County, Real Property Tax Services, https://cortlandcountyny.gov/195/Real-Property-Tax-Services. Reviewed 2026-08-09.
Source: Cortland County Clerk, Small Claims Assessment Review, https://www.cortlandcountyny.gov/177/Real-Property. Reviewed 2026-08-09.
Source: Erie County Real Property Tax Services, Assessment Calendar, https://www3.erie.gov/ecrpts/assessment-calendar. Reviewed 2026-08-09.
Source: Erie County Real Property Tax Services, General Information and Municipal Contacts, https://www3.erie.gov/ecrpts/general-information. Reviewed 2026-08-09.
Source: Genesee County, 2026 City Tentative Assessment Roll, https://www.geneseeny.gov/files/sharedassets/county/v/1/treasurer/assessment-rolls/city-2026-tentative-roll.pdf. Reviewed 2026-08-09.
Source: Genesee County, Local Assessors, https://www.geneseeny.gov/Department-Content/Treasurer-and-Real-Property/Local-Assessors. Reviewed 2026-08-09.
Source: Genesee County, Property and PROS, https://www.geneseeny.gov/Services/Property. Reviewed 2026-08-09.
Source: Genesee County, Treasurer and Real Property, https://www.geneseeny.gov/Department-Content/Treasurer-and-Real-Property. Reviewed 2026-08-09.
Source: Livingston County, 2026 Assessment Rolls, https://www.livingstoncountyny.gov/1838/2026-Assessment-Rolls. Reviewed 2026-08-09.
Source: Livingston County, 2026 Reassessment Project, https://livingstoncountyny.gov/DocumentCenter/View/23399/2026-Reassessment-Project. Reviewed 2026-08-09.
Source: Livingston County, Real Property Tax Services, https://livingstoncountyny.gov/232/Real-Property-Tax-Services. Reviewed 2026-08-09.
Source: Monroe County Real Property Tax Service, 2026 Equalization Rates and Levels of Assessment, https://www.monroecounty.gov/property-equalization. Reviewed 2026-07-29.
Source: Monroe County Real Property Tax Service, Town and City Property Assessment Dates, https://www.monroecounty.gov/property-assessmentdates. Reviewed 2026-07-29.
Source: Monroe County Real Property Tax Service, Town Assessors and Tax Receivers, https://www.monroecounty.gov/property-assessorcontacts. Reviewed 2026-07-29.
Source: Montgomery County, Grievance Day Information, https://www.montgomerycountyny.gov/web/sites/departments/realproperty/dates_grievance.asp. Reviewed 2026-08-09.
Source: Montgomery County, Important Assessment Dates for City of Amsterdam, https://www.montgomerycountyny.gov/web/sites/departments/realproperty/dates_coa_assessment.asp. Reviewed 2026-08-09.
Source: Montgomery County, Real Property Tax Department, https://www.co.montgomery.ny.us/web/sites/departments/realproperty/default.asp. Reviewed 2026-08-09.
Source: Nassau County Assessment Review Commission, ARC 2027-28 Filing Brochure, https://www.nassaucountyny.gov/DocumentCenter/View/51758/ARC-Trifold-2027-28-english-EXTENDED?bidId=. Reviewed 2026-07-15.
Source: Nassau County Assessment Review Commission, Assessment Review on the Web, https://www.nassaucountyny.gov/arcwebcitizen/Jsp/HomePage.jsp. Reviewed 2026-07-15.
Source: Nassau County Government, Assessment Review Commission, https://www.nassaucountyny.gov/1510/Assessment-Review-Commission. Reviewed 2026-07-15.
Source: Nassau County Government, How to Appeal Your Assessment, https://www.nassaucountyny.gov/2207/How-to-Appeal-Your-Assessment. Reviewed 2026-07-15.
Source: New York City Department of Finance, Challenge Your Property's Assessed Value, https://www.nyc.gov/site/finance/property/challenge-your-assessment.page. Reviewed 2026-08-09.
Source: New York City Department of Finance, Property Assessment and Valuation Forms, https://www.nyc.gov/site/finance/property/property-forms-assessments-and-valuations.page. Reviewed 2026-08-09.
Source: New York City Department of Finance, Property Assessments and Final Assessment Roll Data, https://www.nyc.gov/site/finance/property/property-assessments.page. Reviewed 2026-08-09.
Source: New York City Tax Commission, 2026 TC106 Instructions, https://www.nyc.gov/assets/taxcommission/downloads/pdf/tc106-2026.pdf. Reviewed 2026-08-09.
Source: New York City Tax Commission, 2026/27 Assessment Application Forms and Instructions, https://www.nyc.gov/site/taxcommission/forms/forms.page. Reviewed 2026-08-09.
Source: New York City Tax Commission, Assessment Application Forms and Instructions, https://home4.nyc.gov/site/taxcommission/forms/forms.page. Reviewed 2026-08-09.
Source: New York City Tax Commission, Challenging Notice of Property Valuation, https://www.nyc.gov/site/taxcommission/about/challenging-notice-of-property-value.page. Reviewed 2026-08-09.
Source: New York City Tax Commission, Judicial Review of Tax Commission Determinations (TC707), https://www.nyc.gov/assets/taxcommission/downloads/pdf/tc707-2026.pdf. Reviewed 2026-08-09.
Source: New York City Tax Commission, NYC Tax Commission, https://www.nyc.gov/site/taxcommission/. Reviewed 2026-08-09.
Source: New York State Department of Taxation and Finance, Assessment Grievance Forms, https://www.tax.ny.gov/forms/orpts/assessment_grievance.htm. Reviewed 2026-07-29.
Source: New York State Department of Taxation and Finance, Assessment Rolls, https://www.tax.ny.gov/pit/property/learn/asmtrolls.htm. Reviewed 2026-08-09.
Source: New York State Department of Taxation and Finance, Check Your Assessment, https://www.tax.ny.gov/pit/property/assess/local/. Reviewed 2026-08-09.
Source: New York State Department of Taxation and Finance, Contesting Your Assessment, https://www.tax.ny.gov/pdf/publications/orpts/grievancebooklet.pdf. Reviewed 2026-08-09.
Source: New York State Department of Taxation and Finance, Grievance Procedures, https://www.tax.ny.gov/pit/property/contest/grievproced.htm. Reviewed 2026-08-09.
Source: New York State Department of Taxation and Finance, Municipal Data Portal, https://www.tax.ny.gov/pit/property/munidataportal.htm. Reviewed 2026-08-09.
Source: New York State Department of Taxation and Finance, New York real property tax cycle, https://www.tax.ny.gov/pubs_and_bulls/orpts/rptcal.htm. Reviewed 2026-08-09.
Source: Niagara County, How to Contest Your Assessment, https://downloads.niagaracounty.gov/Document_center/Department/M%20-%20R/Real%20Property/1114%20How%20to%20Contest%20Your%20Assessment%20Booklet.pdf. Reviewed 2026-08-09.
Source: Niagara County, Local Assessors, https://downloads.niagaracounty.gov/departments/m-r/real_property/resources/local_assessors.php. Reviewed 2026-08-09.
Source: Niagara County, Real Property Tax Services, https://downloads.niagaracounty.gov/departments/m-r/real_property/index.php. Reviewed 2026-08-09.
Source: Oneida County, Assessment Rolls Archive, https://oneidacountyny.gov/departments/finance/assessment-rolls-archive/. Reviewed 2026-08-09.
Source: Oneida County, Real Property Services, https://oneidacountyny.gov/departments/finance/real-property-services/. Reviewed 2026-08-09.
Source: Onondaga County Clerk, County Clerk Frequently Asked Questions, https://onondaga.gov/clerk/faqs/. Reviewed 2026-08-08.
Source: Onondaga County Real Property Tax Services, 2026 Tentative and Final Assessment Rolls, https://onondaga.gov/rpts/assessment-rolls/. Reviewed 2026-08-08.
Source: Onondaga County Real Property Tax Services, Assessment Information, https://onondaga.gov/rpts/assessment-information/. Reviewed 2026-08-08.
Source: Onondaga County Real Property Tax Services, Property Assessment Information, https://onondaga.gov/rpts/property-tax-info/. Reviewed 2026-08-08.
Source: Orleans County, Kendall Final Assessment Roll 2024, https://www.orleanscountyny.gov/Kendall%20Final%20Assessment%20Roll%202024.pdf. Reviewed 2026-08-09.
Source: Oswego County, Real Property Tax Services Annual Report, https://www.oswegocounty.com/RPTS/files/2022%20Real%20Property%20Annual%20Report.pdf. Reviewed 2026-08-09.
Source: Putnam County, 2026 State of the County Real Property Tax Service Agency Report, https://putnamcountyny.gov/images/Departments/County_Exec/sotc/2026/2026%20SoC-Annual%20Report-All%20County%20Departments%20Copy.pdf. Reviewed 2026-08-09.
Source: Putnam County Real Property Tax Service, Real Property Search Instructions, https://www.putnamcountyny.gov/images/Departments/Real_Property_Tax/PDF_Documents/Search%20Instructions%20-%20Real%20Property%20Web%20Page%20NO%20IQSpcny.pdf. Reviewed 2026-08-09.
Source: Schenectady County, Real Property Tax Service Agency and 2026 Rolls, https://www.schenectadycountyny.gov/taxmaps. Reviewed 2026-08-09.
Source: St. Lawrence County, Grievance Tools, https://www.stlawco.gov/Departments/RealProperty/GrievanceTools. Reviewed 2026-08-09.
Source: St. Lawrence County, Real Property Department, https://www.stlawco.gov/Departments/RealProperty. Reviewed 2026-08-09.
Source: Steuben County, Assessment Rolls, https://www.steubencountyny.gov/347/Assessment-Rolls. Reviewed 2026-08-09.
Source: Steuben County, Real Property Tax Service, https://www.steubencountyny.gov/334/Real-Property-Tax-Service. Reviewed 2026-08-09.
Source: Steuben County Real Property Tax Service, Assessment Roll and Grievance Day Calendar, https://steubencountyny.gov/DocumentCenter/View/1117/Assessment-RollGrievance-Day-Calendar-PDF?bidId=. Reviewed 2026-08-09.
Source: Suffolk County Budget and Management, Property Assessments and Grievance Information, https://suffolkcountyny.gov/Elected-Officials/County-Executive/Budget-and-Management. Reviewed 2026-08-09.
Source: Suffolk County Clerk, File a Small Claims Assessment Review Petition, https://www.suffolkcountyny.gov/Elected-Officials/County-Clerk/Court-Actions-and-Court-Minutes/File-A-Small-Claims-Assessment-Review-Petition. Reviewed 2026-08-09.
Source: Suffolk County Comptroller, Information for Taxpayers, https://suffolkcountyny.gov/comptroller/Information-for-Taxpayers. Reviewed 2026-08-09.
Source: Town of Chautauqua, Town of Chautauqua Tax Collector and 2026 Tentative Roll, https://www.townofchautauqua.gov/tax-collector.html. Reviewed 2026-08-09.
Source: Town of Geneseo, 2026 Geneseo Tentative Roll Notice, https://geneseony.org/town/news/2026/notice-of-filing-tentative-assessment-roll/. Reviewed 2026-08-09.
Source: Town of Oswego, Assessor's Office and Assessment Rolls, https://townofoswego.gov/departments/assessors-office/. Reviewed 2026-08-09.
Source: Town of Palmyra, Formal Review and Grievance Day, https://www.palmyrany.gov/copy-of-informal-review-process. Reviewed 2026-08-09.
Source: Town of Somers, Assessor, https://www.somersny.gov/departments/assessor. Reviewed 2026-08-09.
Source: Town of Whitestown, Property Assessment Information, https://whitestownny.gov/government/property-assessment-information. Reviewed 2026-08-09.
Source: Village of Scarsdale, 2026 Grievance Day Calendar, https://www.scarsdale.gov/Calendar.aspx?EID=1799. Reviewed 2026-08-09.
Source: Village of Scarsdale, Challenging Your Assessment, https://www.scarsdale.gov/496/Challenging-your-Assessment. Reviewed 2026-08-09.
Source: Wayne County, Assessment Rolls, https://waynecountyny.gov/337/Assessment-Rolls. Reviewed 2026-08-09.
Source: Wayne County, Real Property Tax Service, https://www.waynecountyny.gov/333/Real-Property-Tax-Service. Reviewed 2026-08-09.
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