Grievance Calculator

About This Calculator

This calculator walks you through the AROW grievance process step-by-step and prepares the key numbers and the Part D statement you’ll paste into your filing. The approach is based on publicly shared methods and community knowledge from Jeff Gold and members of Nassau Grieve Your Tax Assessment – Free.

If after using this tool you still can’t file your own grievance, Jeff Gold offers flat-rate $250 grievances here: https://jeffgoldflatrategrievances.com/.
(Not an endorsement. This tool is not affiliated with or sponsored by his firm.)

Step 1 – Compute what Nassau County thinks your house could sell for i

Find your Tentative Assessed Value on your mailed Notice of Tentative Assessed Value, or look it up at https://lrv.nassaucountyny.gov/.

Tentative Assessed Value i

Multiplier 1886 • LoA .053%

Nassau County considers your property's fair market value (FMV) to be:

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Calculated as: Assessed × 1886

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)

Go to the AROW homepage: AROW – Home.
Create an account (Register) or Log In if you already have one.
Follow the prompts to begin your grievance. You can save and return later.

You can proceed to Step 2 below to gather the numbers you’ll need for the application.

Step 2 – Enter the AROW Average Adjusted Sale Price i

Use the AROW “File an Appeal using Sales Locator” (Find Sales)

Open: File an Appeal using Sales Locator (AROW).
Enter your street address or Section / Block / Lot, then click Search. You may need to complete a CAPTCHA.
Click your Parcel ID to open your property page.
Scroll to the bottom and click Find Sales.
Select 3-5 recent sales similar to your home in your school district. AROW will adjust each sale to match your home.
Prefer sales that sold for less than your FMV that we calculated above in Step 1
Click Select Checked Properties and Continue, then click Continue again.
Copy the Average Adjusted Sale Price and enter it below.

Average Adjusted Sale Price (from AROW)

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 suggested value for Part B in ARC, the applicants requested value.

Continue to Step 3 to generate your Part D statement.

Step 3 – Part D Statement i

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?”. 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 pasted Part D into AROW, continue to Step 4 for final submission tips.

Step 4 – Submit Your Grievance i

Finishing up

Once you’ve completed Parts A through D and reviewed your entries, click “Submit” in AROW to file your grievance. You should receive an email confirmation from ARC.

ARC decisions often take about 6–9 months. Watch your email carefully for ARC communications.

Join the Facebook group Nassau Grieve Your Tax Assessment – Free to see current member contributions and additional guidance.

All Done!

✅ Ready to submit

Double-check everything in AROW before submitting.

Free tool notice: This is a free website intended to help guide Nassau County homeowners through filing a grievance. You are responsible for everything you submit to ARC via AROW.

Personal use only: This website is provided for personal, non-commercial use only.

Privacy: This site does not store, retain, or collect the information you enter for data retention purposes. (It runs locally in your browser.)