Frequently Asked Questions

A grievance is a formal challenge to the "Fair Market Value" that Nassau County has assigned to your property. If we can prove the County's valuation is higher than what your home is actually worth, or higher than similar homes on your block, the Assessment Review Commission (ARC) can lower your assessment, which reduces your future tax bills.

No. By law, the Assessment Review Commission (ARC) cannot increase your assessment as a result of filing a grievance. The outcome will either be a reduction or no change. There is zero risk to your current assessment by challenging it.

In the vast majority of cases, no. Our process is driven by Curated Market Intelligence and neighborhood equity data. Unless you are claiming massive structural damage that requires a specialized "Cost-to-Cure" argument, a physical inspection is rarely required to win a reduction.

Our system has already pre-processed the entire Nassau County database. When you enter your address, we instantly cross-reference your home's SBL (Section-Block-Lot) against our database of 20,000+ verified recent sales and local assessment floors. This allows us to give you a surgical estimate of your potential savings in real-time.

Data alone doesn't win cases; the logic does. For Evidence Pack users, our AI acts as a professional consultant. It translates raw market data into a dispassionate, legal-grade narrative using standard terminology like SBL, Grade, and CDU. It selects only the most persuasive comparables and omits "noisy" data that could hurt your case, ensuring the ARC reviewer sees a clear, objective reason for a reduction.

Nassau County operates on a long cycle. A successful 2027 grievance will impact your 2028/29 School Tax Bill (typically arriving in October 2028) and your 2029 General Tax Bill (arriving in January 2029). This is why starting early is critical.

• Evidence Pack (Early-Bird Rate: $99, increases to $149 once the County filing window opens): You receive our AI-generated evidence report and file the grievance yourself via the County's AROW portal. You keep 100% of the savings.
• Filed For You (Early-Bird Rate: $199, increases to $249 once the County filing window opens): We prepare and file your Nassau County grievance package for one flat fee. There is no contingency fee and you keep 100% of any savings.
• Full-Service Appeal (Early-Bird Rate: 25% of the first year's savings, increases to 30% once the County filing window opens): We handle the end-to-end process: filing strategy, authorization, deadlines, review responses, hearing preparation, and negotiation. If we don't win a reduction, you pay $0.

No. Evidence Pack and Filed For You are one-time flat-fee options. Full-Service Appeal has no upfront cost, and if there is no reduction, you pay $0. There are no "processing fees" or "appraisal fees" tucked into our contracts.

Absolutely. If your purchase price was lower than the County's market value, your own sale is the strongest evidence possible. Our engine will use your recent closing and anchor it against the 20,000+ verified sales in our database to ensure the County equalizes your value immediately.

Yes. We use "Cost-to-Cure" logic. When you provide details about deferred maintenance, our AI integrates these defects as direct negative adjustments to your home's value. We speak the language of "Functional Obsolescence" to prove to the ARC that your home is worth less than a renovated "peer" property.

Condos and Co-ops in Nassau are valued differently (based on income-producing potential). Our current Precision Prediction Model is optimized for Class 1 Residential properties (Single-family, 2-family, etc.). If you own a residential home, our data is tailored specifically for you.

The tax grievance is tied to the Section-Block-Lot (SBL) of the property, not the specific owner. If you sell, the appeal moves forward with the house. Having an active, data-backed grievance can actually be a selling point, as it proves to potential buyers that you are proactively lowering the future tax burden. If you are the buyer, our 10-Second Analysis can immediately show you if the previous owner was over-assessed.

Yes, and you should try. Every January 2nd, the County releases a new "Tentative Assessment Roll." The market is dynamic, over 20,000 sales happen in Nassau every two years, and your neighbors' assessments are constantly shifting. Even if you won last year, a new "Equity Gap" may have opened up. Our engine re-scans the entire neighborhood every season to see if you can be "pushed" even lower toward the new Equity Floor.

Nassau County assessments rarely stay stagnant. If your neighbors file and you don't, you may end up carrying a disproportionate share of the neighborhood tax burden. By filing annually, you ensure your home is always equalized with the lowest-assessed similar properties on your block. Our Live Neighborhood Tracking makes this easy by identifying new "Same-Street" evidence the moment it becomes available.

Assessments are highly specific to the home's SBL, Grade, and Condition (CDU). Your neighbor may have had a different "structural grade" or specific defects that our Cost-to-Cure logic identified. This is exactly why we don't use generic neighborhood averages. We look at the specific data for your lot to find the unique "Equity Gap" that applies only to you.

The Assessment Review Commission (ARC) is legally barred from increasing your assessment just because you filed a grievance. While a major renovation increases market value, your "Equity" is still compared to the rest of the block. Our Precision Prediction Model can help determine if you are still over-assessed relative to other renovated homes in your area, ensuring you don't pay more than your fair share for those improvements.

• For Filed For You: No. We prepare and file your Nassau County grievance package and manage the filing workflow.
• For Full-Service Appeal: No. We act as your authorized representative for the full appeal workflow, including ARC review responses, negotiation, and hearing preparation where needed.
• For Evidence Pack: You remain the point of contact, but we provide you with the AI-Powered Narrative and the SBL-specific evidence you need. You simply upload our report to the County's portal, and the data does the talking for you.