New York Residential Property Assessment Ratios Since 1982

Residential assessment ratios for New York State taxing jurisdictions are provided annually by the Department of Taxation and Finance. The data includes RATE YEAR, COUNTY NAME, MUNICIPALITY NAME, VILLAGE NAME, SWIS CODE, TYPE, and RESIDENTIAL ASSESSMENT RATIO columns, with records beginning in rate year 1982. Data is published by data.ny.gov and was last updated in November 2025.

Use Cases

• Analyze trends in RESIDENTIAL ASSESSMENT RATIO over RATE YEAR for a specific COUNTY NAME to monitor assessment consistency.
• Compare assessment levels between different MUNICIPALITY NAME entities using the RESIDENTIAL ASSESSMENT RATIO and TYPE fields.
• Model the relationship between RESIDENTIAL ASSESSMENT RATIO and geographic identifiers like SWIS CODE and COUNTY NAME.
• Identify jurisdictions with outlier RESIDENTIAL ASSESSMENT RATIO values for further audit or policy review.

Strengths

• Time-series data spans multiple decades, beginning in RATE YEAR 1982.
• Includes granular geographic identifiers: COUNTY NAME, MUNICIPALITY NAME, VILLAGE NAME, and SWIS CODE.
• Data is updated annually by a state tax authority, ensuring official provenance.

Limitations

• Sample size and total row count are unknown, limiting analysis of statistical significance.
• Data is limited to New York State, preventing national or regional comparisons.

Provenance

Source

New York State Department of Taxation and Finance via data.ny.gov.

Collection Method

Officially established annual ratios for assessing taxing jurisdictions.

Time Range

Beginning rate year 1982 onwards.

Freshness

Updated annually; last update was November 2025.

Geography

New York State, United States.