Monroe County, NY Property Tax Appeal Guide for 2027

What deadline matters first

For Monroe County towns, the key 2027 deadline is Grievance Day: May 25, 2027. Monroe County’s town calendar uses May 1 for the tentative assessment roll, the fourth Tuesday in May for Grievance Day, and July 1 for the final assessment roll. The county explains that Grievance Day is when the Board of Assessment Review meets and the last day owners may file a formal complaint seeking a reduction in a tentative assessment. Monroe County assessment dates

This county hub uses the Monroe County town schedule, not the separate City of Rochester schedule. If your property is in the City of Rochester or in a village that assesses property separately, confirm the local dates before filing.

New York generally uses Form RP-524, Complaint on Real Property Assessment for properties outside New York City and Nassau County. The state says the form is filed with the assessor or the board of assessment review (BAR) in your city or town, and that missing Grievance Day can mean losing administrative and judicial review for that assessment year. New York grievance procedures

The common value appeal

The most common homeowner reason is Excessive Assessment. In plain English, this means you believe the assessed value is higher than the home’s full market value for the assessment year.

For the 2027 Monroe County town assessment year in this policy, value is measured as of July 1, 2026. Ownership and physical condition are measured as of March 1, 2027. That means the best evidence usually points to what a similar home would have sold for around the valuation date, with your home’s condition as of taxable status date.

New York’s RP-524 instructions describe Excessive Assessment as including overvaluation, where the assessed valuation is greater than full market value. The instructions also say certain partial exemption denials and improper transition assessment calculations may be raised under this reason when they apply. RP-524 instructions

The supplied 2027 effective tax rate estimate for Monroe County is 2.79%. That means a $10,000 assessment difference roughly corresponds to $279 in annual tax impact before exemptions, rate changes, and local levy details. This is an estimate, not a promise of savings or outcome.

Other reasons you might appeal

Form RP-524 also includes official reasons beyond Excessive Assessment. Keep the official labels exactly as they appear because they matter for filing. New York assessment grievance forms

Unequal Assessment means your property is assessed at a higher percentage of market value than other property on the same assessment roll. For many one-, two-, or three-family homes, this may involve the residential assessment ratio or comparable assessment ratios.

Unlawful Assessment means the assessment is claimed to be legally invalid. Examples include property that should be wholly exempt, property listed in the wrong taxing jurisdiction, property assessed by someone without authority, or property that cannot be identified from the roll description or tax map number.

Misclassification means the property is claimed to have the wrong class designation or an improper allocation between homestead and non-homestead real property, where class-based assessing applies.

You may have more than one issue. For example, a home could have a value concern and a separate classification concern. The point is to match the facts to the official RP-524 labels, not to guess at the friendliest-sounding reason.

If your Notice of Assessment says something else changed

A Notice of Assessment is the notice from the assessor showing the assessment or assessment change placed on your property. In Monroe County towns, the tentative assessment roll is the May 1 public roll of proposed assessed values, and the final assessment roll is filed July 1. Monroe County assessment dates

If your notice or roll information shows only a higher value, Excessive Assessment may be the reason to study first. If it shows something else changed, slow down and identify what changed.

If a partial exemption such as senior citizens, veterans, or STAR was denied in whole or in part, New York’s RP-524 instructions say that may be raised as Excessive Assessment, not Unlawful Assessment. If the issue is that the property should be wholly exempt, the instructions discuss that under Unlawful Assessment. RP-524 instructions

If the notice shows a class issue, consider Misclassification. If it shows a jurisdiction, authority, or roll description problem, consider Unlawful Assessment. If it suggests your assessment ratio is higher than others on the same roll, consider Unequal Assessment.

What evidence helps

Good evidence is specific, local, and easy for the Board of Assessment Review to compare. For a home value filing, start with recent open-market, arm’s-length sales of homes similar to yours in location, property type, use, size, age, condition, quality, and other value-influencing features.

For this Monroe County town policy, TaxSauce uses a conservative comparable-sale window from July 1, 2025 through March 1, 2027, with preference for sales closest to the July 1, 2026 valuation date. There is no strict countywide published rule in the supplied policy for a maximum distance, number of sales, or size variance, so explain any differences clearly.

New York’s RP-524 instructions recognize several types of market value support, including a recent sale of the subject property, a professional appraisal, a recent offering price, construction cost, income and expense data for income-producing property, and purchase prices of comparable properties recently sold. RP-524 instructions

Monroe County’s Real Property Portal can help you look up individual property information, taxes, and historical sales. The county’s Real Property Tax Service also maintains assessment rolls and supports local assessors. Monroe County Real Property

Avoid relying on sales that are not normal market transactions unless you explain them carefully. Family transfers, foreclosure or forced sales, estate or nominal-consideration transfers, unusual financing, major concessions, or materially different properties may be discounted or ignored by a reviewer.

What the board can and cannot decide

The Board of Assessment Review (BAR) is the local body that hears assessment complaints. New York says the BAR has three to five members appointed by the city council, town board, or village board, and it cannot include the assessor or assessor’s office staff. New York grievance procedures

The BAR can review your RP-524, listen to your statement, look at your evidence, and decide whether the tentative assessment should be reduced or otherwise corrected. You have the right to attend and present documentation.

The BAR cannot lower your taxes simply because the bill is hard to afford. New York explains that assessors do not determine property taxes and that tax levels are set by taxing jurisdictions such as school boards, county legislatures, city councils, town boards, fire districts, and special districts. Contest your assessment

For a volume sense, Monroe County Real Property Tax Service says it maintains assessment rolls and apportions the county levy among 21 assessing jurisdictions in the county. That is why your evidence should be organized around your local assessing unit and your property’s specific facts. Monroe County Real Property

How TaxSauce helps

TaxSauce helps you turn a confusing assessment notice into an organized filing package. We help estimate whether the assessment appears high, gather and compare sales, flag facts that may not fit the market value reason, and prepare plain-English support for the official RP-524 reason you choose.

For Excessive Assessment, TaxSauce can help build a comparable-sale set, explain differences such as size or condition, and estimate a requested market value and reduction. For Unequal Assessment, Unlawful Assessment, or Misclassification, TaxSauce helps organize the documents and facts so you can decide whether those official labels fit.

You remain in control. You review the information, choose the official reason or reasons, sign the form, authorize any representative if needed, and submit the filing to the assessor or Board of Assessment Review by the deadline. TaxSauce does not promise a reduction or guarantee that the BAR will accept your evidence.