Ontario County Property Tax Records
Ontario County property tax records are managed by the Real Property Tax Department at the Municipal Building in Canandaigua. The office maintains assessment rolls, tax maps, and property data for all municipalities in this Finger Lakes region county. You can search records through the OnCOR Property App, which shows tax map and property details on an interactive platform. The county also offers Image Mate Online for viewing assessment data by municipality. Both tools are free to use, and no account is needed. Contact the office at (585) 396-4382 for help with any Ontario County property tax questions.
Ontario County Property Tax Overview
Ontario County Property Tax Records Online
The OnCOR Property App is Ontario County's interactive tool for searching property tax records. It combines tax map data with property information in a map-based viewer. You can click on any parcel to see its assessed value, owner details, and lot dimensions. The app also lets you search by tax number or address through the GIS mapping interface. Keep in mind that the mapping data is for general reference only and should not replace a professional survey.
A second option is Image Mate Online through the SDG platform. This tool provides assessment rolls sorted by municipality. You can search by tax ID, owner name, or address. The system displays property characteristics, comparable sales data, and the current assessment roll for each town and village in Ontario County. It is free to use and available to anyone.
The county runs an annual reassessment program that keeps property values current. Assessment rolls are available for viewing by municipality, and the office publishes tax rates for county, town, special district, school, and village levies. You can also view your tax bill online and see the schedule for tax collection dates.
Property Tax Assessments in Ontario County
Each town in Ontario County has a local assessor who determines property values. The Real Property Tax Department helps these assessors stay consistent and up to date. Assessed values are based on market data from recent sales in the area. The tentative assessment roll publishes May 1 under the Real Property Tax Law. After that, you have until Grievance Day to challenge your value.
Ontario County publishes its grievance days schedule each year on the department website. To file a formal complaint, submit Form RP-524 to the Board of Assessment Review by the deadline. The board reviews your case and issues a decision. If the outcome does not go your way, Small Claims Assessment Review is the next option. You file Form RPTL-730 within 30 days of the final roll. The county has a resource page explaining how the property tax cap works and how to calculate your estimated taxes, both of which are helpful when preparing a grievance.
Note: Ontario County's annual reassessment program means values are updated more frequently than in counties that rely on periodic revaluations.
Ontario County Tax Payment Information
Tax bills in Ontario County go out in January for town and county taxes. Each town has its own tax collector. School taxes are billed separately in the fall. Payment options vary by town but typically include in-person, mail, and sometimes online. Late payments incur penalties that increase monthly under RPTL.
The Uniform Assessment Standard documentation on the county website explains how rates are set and applied. Tax collectors' contact information is also posted so you can reach the right office for your municipality. If you have questions about how your bill was calculated, the Real Property Tax Department at (585) 396-4382 can walk you through it. They can also explain how the different levies on your bill break down between county, town, school, and special districts.
State Resources for Ontario County Tax Records
The Municipal Data Portal lists every Ontario County assessor with contact details and links to local tools. SalesWeb offers years of sales data for each municipality. The Check Your Assessment page helps you review your value step by step.
The full text of the Real Property Tax Law is on the State Senate website. Ontario County falls in the Finger Lakes region served by the Rochester ORPTS regional office. The NYS Statewide Parcel Map includes Ontario County data that gets updated annually. This is useful for research and comparing parcel information across county lines.
Nearby Counties
Counties surrounding Ontario each run their own property tax systems. Pick one below for local details and search tools.