This website is designed to guide Nassau County homeowners through the process of filing a property tax assessment grievance on their own without needing a paid representative.
The logic and approach used here were developed from the knowledge of Jeff Gold, owner of The Gold Firm and founder of the Facebook group
Nassau Grieve Your Tax Assessment – Free.
His methods, along with the shared experiences of that community, inspired the step-by-step guidance you’ll find below.
This tool helps you estimate what the county believes your home could sell for, find appropriate comparables, and prepare the key information for your grievance application.
All calculations follow the same principles discussed in Jeff Gold’s resources to file your grievance with the Nassau County Assessment Review Commission (ARC).
If after using this tool you still find you cannot file your own grievance, there is no need to use a firm that will take a percentage of your tax savings.
Jeff Gold offers flat-rate $250 grievances on his website:
https://jeffgoldflatrategrievances.com/.
(This is not an endorsement and this tool is not affiliated with or sponsored by his firm. However, his publicly shared methods form the foundation of the guidance provided here.)
Step 1 – Compute what Nassau County thinks your house could sell for
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Find your Tentative Assessed Value on your mailed Notice of Tentative Assessed Value, or look it up at
https://lrv.nassaucountyny.gov/.
Nassau County considers your property's fair market value (FMV) to be:
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Calculated as: Assessed × 1666
If you believe that you cannot sell your property for the above amount, you should file a grievance to ask the county to revise its assessment.
Even if the value may be reasonable, it may still be a good idea to file a grievance as the county cannot raise your assessment as a result of a grievance.
Start your grievance application (online via AROW)
Enter your street addressor your Section / Block / Lot, then click Search. You may need to complete a CAPTCHA.
Click your Parcel ID in the results to open your property page.
Scroll to the bottom and click Find Sales.
Select 3–5 recent sales that are similar to your home and in your school district.
Don’t worry if beds/baths/SqFt are slightly different - AROW will show an adjusted value to match your home.
Keep your selected sales under your Step 1 “could sell for” number above.
Prefer sales that are near the top of the list (typically most relevant).
Click Select Checked Properties and Continue. Review the Adjusted Value shown for each sale.
Click Continue again. AROW will display the Average Adjusted Sale Price.
Enter that Average Adjusted Sale Price below.
Average Adjusted Sale Price
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From AROW after choosing 3–5 comps
Suggested Part B Value (Average × 0.60)
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Use this as your value for Part B: Applicant's Request Full Market Value in your grievance.
Continue to Step 3 to get the statement to put in your Part D “Other facts” comments section.
Step 3 – Part D Statement
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Where this goes in your application
In AROW, go to Part D and click “Display” to make the section appear.
You can leave most fields blank, but you may wish to check boxes for items that apply under
“Are any of these adjacent to or visible from the house?” (for example: waterfront, park, railroad, commercial property, apartment house, golf course, or a street with a painted center line).
Then, in the “Other facts” box, paste the statement generated below.
Part D - Other Facts
Paste this into Part D → “Other Facts” in your AROW grievance form.
When you’ve copied and pasted your statement into AROW, continue to Step 4 for final tips.
Step 4 – Submit Your Grievance
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Finishing up your application
Once you’ve completed Parts A through D and reviewed your entries, click “Submit” in AROW to file your grievance.
You’ll receive a confirmation notice by email from the Nassau County Assessment Review Commission (ARC).
ARC typically reviews grievances over the next 6 – 9 months.
Watch your email carefully for any offer communications.
While you wait, consider joining the Facebook group
Nassau Grieve Your Tax Assessment – Free
to stay updated on current ARC activity, examples, and advice from other Nassau County homeowners.
All Done!
You’ve gathered everything you need to confidently file your grievance.
Good luck and remember to check your inbox for ARC updates!