Stephanie Vanderpool


  • Role

The Assessor’s Department prepares an assessment roll of all real property, vacant and improved, within the City, establishing the condition, value and taxable status of each parcel of property each year. The valuations determined by the Assessor are utilized to apportion the amount of City County, School/Library and Special District taxes to be levied on each parcel. All parcels located within the jurisdictional boundaries of the City are reflected in the official tax map. This tax map is updated semi-annually to reflect parcel subdivisions, mergers, address changes and other necessary modifications otherwise required.

In addition to valuation, the assessor’s duties include, but are not limited to, maintenance of ownership information, updating and computer-entering parcel and building inventory data, , recording all property sales/deed transfers, implementation of all whole and partial property tax exemptions and assisting in the defence of litigation through grievance, small claims and certiorari proceedings

The Assessor’s Office is currently open to the public.  Information is available on this website. However if you need further assistance or have questions or concerns our staff is available to assist by calling the office at (914) 665-2325 or (914) 665-2329 during normal hours 8:30AM to 4:30PM.

Please Submit all applications to the address below.

The Department of Assessment Address:
1 Roosevelt Square,
City Hall – RM #8
Mount Vernon NY. 10550

General inquiry request such as listed below can be emailed to  our staff will be happy to assist.

 Assessment/Real Property Value Information

  • Important Assessment Dates and Deadlines
  • Exemption information
  • Grievance of Real Property Tax  Assessment form ( RP-524)
  • Address Change For Mailing Purpose

Request Assessor Review of your Assessment

The Assessor or her designee will be available by appointment until

Thursday, June 3, 2021, from 10 am-11 am and Friday, June 4, 11 am-12noon,

to discuss Tentative Roll assessments. To schedule an appointment, please contact the Assessor’s Office at (914)665-2325 or 2329. Appointments must be scheduled and confirmed in advance.

The Grievance Application (RP-524) and supporting documentation must be received by the Assessor’s Office prior to scheduling an appointment.

2021 Grievance Applications and Process

Submittal Deadline

Completed grievance applications – accompanied by all supporting documentation – must be received by the Assessor’s Office no later than the close of the Grievance Hearings on Tuesday, June 15, 2021; no new grievance application shall be accepted upon adjournment of the Board of Assessment Review’s meeting on Tuesday, June 15, 2021. Prospective grievant are invited to contact the Assessor’s office prior to Tuesday, June 15, 2021, for assistance with completing the grievance application.

 How to Submit

General requirements applicable to all grievance submissions include:

  • All grievance applications must be received by the Assessor’s Office no later than the close of the Grievance Hearings on June 15, 2021.
  • Only one grievance is legally permissible for each property.
  • Please paper clip all pages (do not use staples). Single-sided documents are preferred.
  • Verify that your grievance packet is complete prior to submittal.
  • Completed grievance packets may be submitted in person or by mail (using USPS, FedEx, UPS, etc.) to the City of Mount Vernon, Attn: Assessor’s Office, 1 Roosevelt Square Room #8, Mount Vernon, NY 10550.
  • Confirm receipt of your submission with the Assessor’s Office.
  • To receive a stamped receipt for a grievance packet, provide a self-addressed stamped envelope as well as the summary page listing the parcel number(s), legal address(es) and property owner name(s).
  • If requesting an appointment with the BAR, one copy of the petitioner’s Complaint on Real Property Assessments Form (RP-524 Form), accompanied by all supporting documentation, must be submitted to the Assessor’s Office before an appointment can be scheduled.

Grievance Hearings

The Board of Assessment Review shall meet on Tuesday, June 15, 2021 (Grievance Hearings), between the hours of 4:00 PM to 8:00 PM  and at such other time or times as may be necessary and appropriate to review the complaints, objections, or grievances brought before them in relation to the assessment roll, and for that purpose may adjourn from time to time.

Hearing Method – Zoom / In Person

Pursuant to Governor Cuomo’s Executive Order 202.108, issued in response to the COVID-19 pandemic, the meeting will be conducted via Zoom video conferencing service. Members of the public wishing to join the meeting will be able to do so by calling 1-929-205-6099 and entering the meeting ID, 823 6514 7103, when prompted. 

Scheduling a Hearing Appointment

It is not mandatory to testify in support of your application before the Board of Assessment Review, as they review all grievances whether the grievant appears or not, rendering a determination as to the final assessment based on the evidence included in the submission. If you wish to schedule a hearing appointment, please review the information below.

Because the Board of Assessment Review will meet to hear grievances electronically using Zoom, applications will only be heard by appointment, with each appointment limited to ten minutes. To schedule an appointment with the Board of Assessment Review, please contact the Assessor’s Office at (914)665-2325  or2329  by email at If you do not receive confirmation, your appointment has not been scheduled.

At the discretion of the Assessor, any grievance application received after June 15 at 6:00 PM may not be heard and considered by the Board of Assessment Review on June 15, 2021.


Complaints are reviewed subsequent to Grievance Day by the 3-member known as the Board of Assessment Review (BAR,) for five-year staggered terms.

Decisions of the BAR can be appealed to the Westchester County Supreme Court thirty days after the filing of the final assessment roll. The final assessment roll, by law, must be filed each year by August 1st. After deliberations of the BAR, all assessments changed or unchanged by the BAR, become final on August 1st.


The Department of Assessment goal is to ensure fair and equitable assessments for all taxpayers. In lieu of the annual Board of Assessment Review (Grievance Day). The Assessor encourages any taxpayer who would like to contest their assessed value to take advantage of our Informal Grievance Period from January 2nd through April 30th each calendar year.

Informal Grievance Filing Procedure

  1. Write a letter to the Assessor Office expressing that you would like to grieve your assessment.                                                               (Please provide your name property address, phone number and email address.)
  2. Provide an appraisal or a CMA (Comparable Market Analysis; a Realtor can provide this service).
    This is the best way to prove market value
  3. You may provide any other supporting evidence i.e., pictures of interior & exterior. repairs if any?


If your property had a fire please contact the Department of Assessment immediately so that we may conduct a field inspection and adjust your assessment based on the percentage of damage. Please also provide your contact information.



The Department of Assessment mailed out re-certification letters for all Veterans please return via email, fax or mail, by May 1, 2021.



Click Here to look up parcel information.


School Tax Relief (STAR)
  1. New applicants who qualify for Basic or Enhanced STAR
    • You will register with New York State instead of applying with your assessor.
    • You will receive a STAR credit in the form of a check rather than receiving a property tax exemption (if you qualify for STAR). The dollar value of the credit will be the same as the property tax exemption. You may register online or by phone 518-457-2036.
      • ***New Requirements for Enhanced STAR***

        New for 2019: If you’re applying or reapplying for the Enhanced STAR exemption, you must enroll in the Income Verification Program (IVP). You only need to enroll once, and you’ll receive the exemption each year, as long as you’re eligible. Please use form RP-425-IVP.

        STAR Program

        NY State School Tax Relief program provides reductions from school property taxes for owner-occupied, primary residences such as homes, condominiums, cooperative apartments, mobile homes and farm homes. New Yorkers who own and live in their one-, two-, or three-family home, condominium, cooperative apartment, mobile home or farm home are eligible for a partial exemption on their primary residence.

        There are two parts to the STAR program: the “Enhanced” STAR exemption and the “Basic” STAR exemption.

        Enhanced STAR

        Senior citizens, ages 65 years or older, with combined incomes that do not exceed $90,550 may qualify for a greater (“enhanced”) exemption. The property must be owned by a husband and wife, or by siblings, with only one of them being at least 65 years 0f age by December 31st of the year in which the exemption will begin, and have a combined income of no more than $90,550.

        Basic STAR

        All other New Yorkers who own and live in their one, two, or three-family home, condominium, cooperative apartment, mobile home or farm home also are eligible for a STAR exemption on their primary residence, regardless of their age.  The combine income of all owners and spouses must be less than $500,000.

        STAR filing deadline is May 1st of each year.

        Veterans Exemption

        Real Property Tax Law, Section 458, provides a partial property tax exemption to those homeowners meeting qualifying veterans criteria, for example, service in the military or certain other persons designated in the Real Property Tax Law.

        Proof of service must be provided when applying in addition to proof of ownership of the property being claimed for exemption. Exemptions are granted only for portions of property used for primary residence purposes. Applications must be submitted by no later than May 1st of each year.

        For more information, go to the CMV Veterans Service Agency.

        City of Mount Vernon Tax Assessment Rolls
      • 2021 Final Assessment Roll Click Here
      • 2020 Final Assessment Roll  Click Here


        Useful Links

        Pay your School Taxes