Why did my assessment change?


Why Did My Assessment Change?
 New York State Real Property Tax Law specifies that property values for example  the 2023 Assessment Roll be based on real estate market conditions as of July 1, 2022.  Any increase in your assessment is generally due to physical changes in your property or changes in market conditions from July 1, 2021 to July 1, 2022.

What are the specific reasons for an assessment change?

  • Physical property change due to new construction or demolition
  • Correction of factual property features such as missing data
  • Adjustment due to a change in market conditions
  • Removal of expired Court decisions (grievance, small claims or other judicial review)

What effect does an increase in assessment have on my taxes?

  • Assessment multiplied by the tax rate equals the taxes. Ex. $500,000 x 0.3917 = $195.85 (prior assessment and tax rate).
  • The tax rate is a result of the levy (amount needed to raise through real property taxes) divided by the taxable value.
  • Property values increase ➝ the levy remains the same ➝ the tax rate decreases ➝ no change or possible increase in taxes.  Ex. $560,000 x 0.3585 = $200.76

What are some examples of typical assessment changes in Southampton? 

  • Additions, garages, pools, tennis courts, decks etc. omitted in error or added to a property but never assessed

Why then do I have an assessment increase? 

  • Higher increases may be due to new construction, renovations or a prior year assessment reduction which is no longer applicable to this year’s assessment. 


What can I do if I want more information about the Assessment Process in Southampton and in New York?


What can I do if I want to appeal my new assessment?

  • First ask yourself if the new assessment, based on sales data and physical characteristics, reflects the market value of your property as of July 1, 2022. If it does not then you may want to file a grievance.
  • You can file a grievance in one of three ways: Digital E-filing, mail or in person.


  • The most efficient way of appealing your assessment is to digitally e-file. You will avoid any lines; you can do it any time and will not have to be concerned about mailing delays. 
  • Follow the instructions and complete a digital e-grievance form found in the Assessors Directory at http://www.southamptontownny.gov/. You will digitally sign your appeal and attach any additional information to your submission. You will receive a verification of submission via email. You must file this form by 4:00 PM (EST) May 16, 2023




  • You may file your appeal in person on Grievance Day, Tuesday, May 16, 2023 at Southampton Town Hall, Lower Level Meeting Room, 116 Hampton Road, Southampton NY 11968  

To avoid waiting in line on Grievance Day, we encourage you to file an e-grievance or mail in your appeal. Your appeal will receive equal scrutiny whether you file by mail, digital e-grievance or in person. All grievances will be reviewed by the Board of Assessment Review. Decisions will be mailed or digitally transmitted by July 1, 2023.

Show All Answers

1. Why did my assessment change?
2. What exemptions am I eligible for?
3. If I file a grievance, when will I know whether it has been successful in lowering my assessment?
4. My property is overvalued and my taxes are too high. How do I grieve my assessment / lower my taxes?
5. Do I have to stand in that long line on Grievance Day? Can I submit my grievance by mail or online?
6. What tax exemptions am I eligible for? (Veterans, Seniors, Volunteer First Responders, etc.)
7. What information should I include with my grievance application?
8. How can I find information about a property (owners, taxes, zoning, etc.)?
9. What will be the assessed value of my home for the tax bill coming in December?
10. What is my assessment based on?
11. What are some of the most common assessment changes in Southampton Town?
12. What can I do if I want more information about the assessment process in Southampton and in New York State?