Complaints & Grievances

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Annual Assessment Filing Period: June 1 – third Tuesday in June

An assessment can be challenged by any person aggrieved by an assessment (e.g., an owner, purchaser, or tenant who is required to pay the real estate taxes pursuant to a lease or written agreement) if the owner of the property files a complaint in the city, town or village in which the property is located. For real property located within the Town of Mamaroneck, that complaint can be filed with the Town Assessor or the Board of Assessment Review. If you're not sure where your property is officially located, visit How do I know if I live in "The Town"?

Filing Requirements for Complaints on Real Property Assessments

The application form and instructions, RP-524 and RP-524-INS, are available from NYS Department of Taxation and Finance. You may complete the complaint form yourself or have your representative or attorney complete it for you.

Assessments Eligible for Review

The only assessment that may be reviewed is the assessment on the current tentative assessment roll completed by the local assessor. As a general rule, a separate complaint should be filed for each separately assessed parcel.

Filing Methods

For real property located within the Town of Mamaroneck, complaints may be filed in-person or by mail from June 1 to the third Tuesday in June.

To file a complaint in-person, submit your complaint to the Town Assessor or with the Board of Assessment Review.

To file a complaint by mail, send your complaint to the Town Assessor's office:

Susan M. Thomas, Assessor
Town of Mamaroneck
740 West Boston Post Road
Mamaroneck, NY 10543

Filing Deadlines

Complaints filed in person – either with the Town Assessor or with the BAR – must be filed no later than the third Tuesday in June. Complaints filed by mail must be postmarked no later than the third Tuesday in June.

Failure to file your complaint in a timely manner precludes your right to administrative and judicial review.