File your grievance with confidence.

Use the Grievance Calculator to walk through AROW step-by-step. Later in the season, you’ll be able to evaluate ARC offers here as well.

Open Grievance Calculator Why Grieve?

What this site is

This site is designed to help Nassau County homeowners file a property tax assessment grievance with clear steps and simple calculations.

Step-by-step Slideshow Instructions

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Helpful links

AROW Homepage (register / login): Open AROW
Sales Locator (choose comps): Open Sales Locator
Assessment lookup (LRV): Open Land Records Viewer

Disclaimer: This website is provided free of charge to assist Nassau County homeowners in understanding and preparing a property tax assessment grievance. All information, calculations, and guidance are for informational purposes only. You are solely responsible for reviewing and submitting any grievance materials to the Nassau County Assessment Review Commission (ARC) through AROW. Nothing on this site should be construed as legal, tax, or appraisal advice.
Contact: For technical issues or feedback, please email admin@nassaugrievancehelp.com. This inbox is not monitored for grievance assistance.
Personal use only: This website is strictly for personal, non-commercial use. It may not be reproduced, redistributed, or used for commercial purposes without permission.
Privacy: Information entered into the calculators is not stored or saved by this site and is processed locally in your browser. The site may use basic analytics to track general usage, but no user-entered data is collected.