Erie County, NY Property Tax Appeal Guide for 2027

Erie County, NY property tax appeal guide for the 2027 roll

This TaxSauce county hub covers the regular New York administrative assessment grievance process for Erie County towns for tax year 2027. The key filing date is Grievance Day, May 25, 2027. Erie County Real Property Tax Services lists May 1 as tentative roll filing, the 4th Tuesday in May as Grievance Day, and July 1 as final roll filing for towns in Erie County. The same county calendar says the Board of Assessment Review meets on Grievance Day to hear assessment complaints. Erie County Real Property Tax Services assessment calendar

Use this page as a preparation guide, not a guarantee that a grievance will be accepted or granted. City or village assessing units can have separate local instructions, so confirm the filing place and local office requirements before submitting.

2027 Erie County deadline

For the 2027 town roll, the regular filing window is May 1, 2027 through May 25, 2027. May 25, 2027 is the 4th Tuesday in May, which is Grievance Day for Erie County towns under the supplied policy data and the county calendar. Erie County Real Property Tax Services assessment calendar

New York's grievance guidance says properties outside New York City and Nassau County use Form RP-524, Complaint on Real Property Assessment, and file it with the assessor or the Board of Assessment Review (BAR) in the city or town. The state also explains that, in most communities, the deadline for Form RP-524 is Grievance Day. New York grievance procedures

What value are you arguing?

For the 2027 roll, the assessment should be tested against market value as of July 1, 2026. Erie County's town calendar says the valuation date is July 1 of the prior year and the taxable status date is March 1. Erie County Real Property Tax Services assessment calendar

New York State explains that assessments are based on value as of the valuation date, while ownership and condition are considered as of taxable status date. State guidance also says comparable sales before and after the valuation date may be used to estimate value. New York property tax calendar

Which RP-524 ground fits a value challenge?

The main value ground from the supplied policy is Excessive Assessment - assessed value exceeds full value. Use it when recent comparable sales, a recent arm's-length purchase, or an appraisal supports a full market value below the assessor's value for the 2027 roll. Form RP-524 also includes Unequal Assessment, Excessive Assessment for partial exemption denial, Excessive Assessment for improper calculation of transition assessment, Unlawful Assessment, and Misclassification. Form RP-524

TaxSauce can help estimate a supportable market value and organize exhibits. You review the evidence, choose the grounds that match your facts, and decide what to submit.

Comparable-sale evidence for Erie County

New York does not publish a fixed Erie County-wide radius, square-footage tolerance, lot-size tolerance, or maximum number of comparable parcels for grievances. The operational defaults in this TaxSauce draft are conservative screening rules, not statutory caps: use sales from July 1, 2025 through May 25, 2027, look within about 5 miles when that is market-consistent, and choose up to 10 of the strongest comparable transactions.

Comparable sales should be recent, open-market, arm's-length sales of similar properties in the same market area or assessing unit, adjusted when material differences matter. New York's valuation standards describe the sales comparison approach as comparing recent similar property sales within the same market area and adjusting for dissimilarities. New York valuation standards

Screen out unreliable sales when possible. New York sales-exclusion guidance identifies transaction conditions that can make a sale unreliable, including related-party issues, government or lending-institution involvement, foreclosure, auction, referee sale, tax sale, bankruptcy, divorce or judicial order, suspect price, property not offered on the open market, uninformed parties, retained rights, non-standard deed issues, and contracts more than 365 days before closing. New York sales-exclusion guidance

For a local market volume check, Erie County's 2025 Annual Report lists 374,376 total parcels and 22,163 transfers during January 1, 2024 through December 31, 2024. That volume metric can help explain why comparable-sale screening matters, because not every transfer is a useful arm's-length comparable sale. Erie County 2025 Annual Report

What to include with Form RP-524

A strong package usually includes:

• Completed Form RP-524.
• The taxpayer's estimate of market value as of July 1, 2026.
• A short explanation of the selected RP-524 ground.
• Comparable-sale details, including sale date, price, property type, location, building size, lot features, condition, and differences from the subject property.
• A recent subject purchase, if it was arm's-length and relevant.
• Photos or condition evidence if repairs, damage, unfinished work, or physical condition affect value.
• A professional appraisal, if available.
• Construction or remodeling cost information when relevant.
• Income and expense information for income-producing property.

RP-524 allows supporting documentation to be attached and, for the ground that assessed value exceeds full value, calls for attaching a list of parcels relied on if applicable. Form RP-524 The RP-524 instructions say market value may be estimated from a recent sale of the subject property or from recent comparable property sales. RP-524 instructions

Filing steps for the 2027 town grievance

1. Review the tentative assessment roll after May 1, 2027. Confirm the assessed value, assessor's implied full value, exemptions, property description, and classification.
2. Estimate market value as of July 1, 2026. Use comparable sales and adjust for material differences.
3. Choose the RP-524 ground that matches your facts. For a market-value issue, that is usually Excessive Assessment - assessed value exceeds full value.
4. Prepare Form RP-524 and attachments. Include only evidence you are comfortable submitting.
5. File with the assessor or Board of Assessment Review by May 25, 2027. Confirm local delivery rules, copies, signatures, and office hours.
6. Attend the BAR hearing if required or if you choose to present. New York guidance says a taxpayer has the right to attend the BAR hearing and present statements or documentation. New York grievance procedures

Planning tax impact

This draft uses an estimated effective tax rate of 2.08% from the verified LocalAppealPolicy snapshot. Treat it as a planning estimate for rough tax-impact math only. Erie County tax bills depend on the assessing unit, school district, exemptions, equalization, special districts, and adopted local tax rates.

Example: if evidence supports a $25,000 lower full market value and that reduction were reflected in taxable value in a way that affects the bill, a 2.08% planning rate would imply about $520 of annual tax impact before local adjustments. This is only an estimate, not a promised result.