To access Property Record Cards/GIS (see below). Please click the Page Navigation button on the right to access archived assessment rolls, links to exemptions, and other important information.

GIS Maps - Town of Cortlandt, NY


Town Assessor

Phone: 914-734-1040

General Email:

Town Hall Office (Office # 5)
1 Heady Street 
Cortlandt Manor, NY 10567

Office Hours: 8:30 AM- 4:00 PM

Save the Date:  Grievance Day is Tuesday, June 20th, 2023

  • Appointments can be made and Grievance Forms will be accepted between June 1st and June 20th.
  • Grievance Day Hearings will be conducted between 5:00 pm and 9:00 pm on June 20th.
  • 15-Minute appointments will be made sequentially on a first come first served basis.
  • Walk-in are welcome, but there may be a wait.  Making an appointment is recommended.
  • You do not need to appear before the Board of Assessment Review (BAR), unless you would like your case heard. 

To file a grievance and for more information, click on the [Page Navigation] button in the upper right corner of this webpage.

Are you wondering if your assessment is fair and should you challenge your assessment?

To determine that, a residential property owner would take the 2023 assessment (when it is available on the June 1, 2023 tentative assessment) and divide it by the 2023 residential assessment ratio of 1.22% (as determined by NYS) to arrive at your full market value. 

For example:  7000 Assessment / .0122 = $573,770 Full Market Value

Or, you can find your assessment and full market value by searching the most recent assessment roll.  For 2023, it will be the 2023 TENTATIVE Assessment Roll published on June 1st:

Then hit [Enter] and you should be taken to your property.  It might take a few minutes as each browser is different and this is a ~3500+ page document.

Then you would want to ask yourself if you could sell your property for what it is assessed at.

  • If the answer is yes, then you are equitably assessed. 
  • If the answer is no and you feel the market value is lower, you might want to contest your assessment.
  • Keep in mind that you will have to provide supporting documentation to substantiate the value you are claiming.

To file a grievance and for more information, click on the [Page Navigation] button in the upper right corner of this webpage.

Important Assessment Calendar Dates:

May 1st - Tax Status Day & Exemption Application Deadlines

June 1st - Tentative Assessment Roll is published and is available on the Town’s homepage.

3rd Tuesday in June - Grievance Day.  Click here for more information on challenging your assessment in NYS.

September 15th - Final Assessment Roll is published and is available on the Town’s homepage.

The taxable assessed values that are established on the June 1st Tentative Roll and finalized on the September 15th Final Roll are then used to apportion the amount of the Town, County and School District taxes to be levied against each parcel of real property.  The prior year’s final roll is the one used to levy the current taxes.  For example, the 2022 Final Assessment Roll will be used to print the 2023-2024 tax bills.

Click here to learn more about the job of the Assessor

2022 FINAL ROLL (please be patient, the links may take a few moments to load.)

Click here for Property Record Card access through GIS. 

Instructions on How to do a Property Record search:

  • Click on blue [Property Search] button (top left corner of the map).
  • Click on the message that appears: [Click to Search for Parcel Info].
  • A search bar will open on the left side of the screen.
  • Enter address of property–street number and name only (do not enter avenue, road, street, etc.).
  • Hit [Enter].
  • Map will move and parcel you are searching for will be highlighted.
  • Property card can be found in a blue link under the map labeled [Prop Card].
  • Property card is a PDF link and can be printed or downloaded.
  • Under the map, check to see how many parcels were identified. If [Property Information (#)] lists 2 or greater, then multiple properties were found with a similar street address. Be sure to select the correct property.
  • Please note that there is also a link to the Tax Map for the property you have
  • searched. This PDF link can be printed or downloaded.
  • Additional information (name, lot size, assessment information, section/block/lot) may be found by using the scroll bar located under the property card.