What Is Property Assessment? A Guide for Long Island Homeowners

If you own a home, you may see a property assessment listed on your property records or tax documents. But what does that number actually mean?

A property assessment is the value assigned to a property for property tax purposes. Local governments use the assessment as part of the calculation that determines a property's tax obligation.

The most important thing to understand is this:

A property assessment is not necessarily the same as your home's market value or your final property tax bill.

Your assessment is one part of a larger property tax system. Understanding how it works can help you better evaluate your tax bill and determine whether your property may be over-assessed.

What Is a Property Tax Assessment?

A property tax assessment is the value assigned to a residential, commercial or other type of property for tax purposes.

Local assessing authorities maintain property records and use applicable assessment methods to determine the assessed value of properties within their jurisdiction.

A property assessment may be used to:

• Determine each property's share of the local tax burden
• Calculate property taxes
• Maintain property assessment records
• Compare properties within an assessing jurisdiction
• Support the distribution of local tax levies

The exact assessment process can vary depending on the municipality, county and local assessment system.

For homeowners, the key question is whether the assessment assigned to their property is accurate and fair.

How Is a Property Assessment Determined?

The process for determining a property assessment varies by location. However, assessing authorities may consider several factors when determining a property's value.

These can include:

• Property size: The size of the home and lot may affect its assessed value.
• Location: Property values can vary significantly between neighborhoods and communities.
• Property type: Single-family homes, condominiums and other property types may be assessed differently.
• Improvements: Additions, renovations or other improvements may affect the property's value.
• Comparable properties: Similar properties and recent sales may provide information about local property values.
• Market conditions: Changes in the real estate market can affect property values.
• Property characteristics: Features such as the number of bedrooms, bathrooms and other recorded characteristics may be considered.

Not every municipality uses the exact same process or gives the same weight to every factor.

This is why homeowners should review the assessment information that applies specifically to their property and municipality.

What Is the Difference Between Assessed Value and Market Value?

One of the most common sources of confusion is the difference between a property's assessed value and its market value.

These numbers can be related, but they are not interchangeable.

For example, a home may have an estimated market value of $700,000 while having an assessed value that is calculated differently under the local assessment system.

Likewise, knowing your home's market value does not automatically tell you how much you will pay in property taxes.

Market value, assessed value and your final property tax bill are three different things.

Understanding this distinction is especially important when evaluating whether your property may be over-assessed.

How Does Property Assessment Affect Your Tax Bill?

A simplified version of the process looks like this:

Property Assessment → Tax Calculation → Property Tax Bill

Your property's assessment is used as part of the process for determining your share of applicable property taxes.

However, your assessment is not the only factor.

Your final tax bill may also be affected by:

• Local tax rates
• School district taxes
• County, town or city taxes
• Special taxing districts
• Available property tax exemptions

This means that reducing an assessment may potentially reduce your property tax obligation, but changes in tax rates can still affect the final amount you pay.

For more information about the factors that can affect your bill, read Why Are Long Island Property Taxes So High?.

Why Did My Property Assessment Increase?

A property assessment can increase for several reasons.

Changes in the Real Estate Market

If property values in your area increase, local assessments may also change.

Reassessment

A municipality may conduct a reassessment or update assessment information to reflect changes in property values.

Property Improvements

Major renovations, additions or other improvements may affect the value assigned to your property.

Corrections to Property Records

An assessment can change if the assessor corrects inaccurate information about the property.

For example, a correction involving square footage, bathrooms or other property characteristics could affect the assessment.

Changes in Assessment Methodology

Local assessment practices and methods can also affect how properties are valued.

An increase in your assessment does not automatically mean that your assessment is incorrect. However, it may be worth reviewing the information used to determine whether the assessment accurately reflects your property.

Does a Higher Property Assessment Mean Higher Property Taxes?

Not necessarily by itself.

A higher assessment can affect the amount of property taxes you owe, but the final tax bill also depends on applicable tax rates and the taxing authorities that apply to your property.

For example:

• Your assessment may increase while a tax rate changes.
• Your assessment may remain the same while tax rates increase.
• Two similar homes may have different tax bills because they are located in different taxing districts.

This is why homeowners should not look at the assessment alone when trying to understand changes in their property tax bill.

How Can I Find My Property Assessment?

Property assessment information is generally available through local government property records.

The exact process depends on where your property is located.

Nassau County Property Assessment

Nassau County homeowners can review assessment information through the county's property assessment resources.

You may want to review information such as:

• Current assessed value
• Property characteristics
• Assessment history
• Property classification
• Relevant assessment notices

If you believe your assessment may be excessive, P.T.R.C. can help you review your property through its Nassau County property tax reduction services.

Suffolk County Property Assessment

Suffolk County assessment information is generally handled through the applicable local assessing authority, depending on the property's location.

Homeowners should review their local property records, assessment notices and other information provided by the appropriate municipality.

Learn more about Suffolk County property tax reduction services and how P.T.R.C. helps homeowners challenge potentially excessive assessments.

How Do I Know If My Property Is Over-Assessed?

An assessment may be worth reviewing if it appears inconsistent with your property's actual characteristics or comparable properties.

Some factors to consider include:

Comparable Properties

Look at similar homes in your area.

Properties with similar characteristics may provide useful information when evaluating whether your assessment appears reasonable.

Recent Property Sales

Recent sales can help provide insight into local market values.

Assessment Comparisons

Comparing your assessment with similar properties may reveal significant differences that deserve further review.

Property Characteristics

Make sure the information recorded about your property is accurate.

Errors involving:

• Square footage
• Lot size
• Number of bedrooms
• Number of bathrooms
• Property condition
• Improvements

may affect the assessment.

Market Value Evidence

Information about your property's estimated market value may also be relevant when determining whether an assessment appears excessive.

If you are unsure where to start, P.T.R.C. can help homeowners understand how to determine if a property may be over-assessed.

Can You Challenge a Property Assessment?

Yes.

If you believe your property assessment is too high or otherwise incorrect, you may be able to challenge it through the applicable property tax grievance process.

The process generally involves:

1. Reviewing the assessment
2. Gathering supporting evidence
3. Filing a grievance before the applicable deadline
4. Having the assessment reviewed by the appropriate authority
5. Receiving a determination
6. Pursuing further review when available and appropriate

The terminology and process can vary depending on your location.

To understand the difference between the different stages, read our guide on how to challenge your property assessment through a tax grievance.

What Happens If My Assessment Is Reduced?

If your property tax grievance is successful, your property's assessed value may be reduced.

A lower assessment can potentially reduce your future property tax obligation.

However, it is important to remember:

A reduction in your assessment does not mean your tax bill will automatically decrease by the same percentage.

Your final tax bill may still be affected by:

• Tax rates
• Tax levies
• School district taxes
• Other applicable taxing authorities
• Property tax exemptions

The timing of when an assessment reduction affects your taxes can also depend on the applicable assessment cycle.

Learn more about what happens after filing a property tax grievance.

Property Assessment in Nassau vs. Suffolk County

While both Nassau and Suffolk County homeowners pay property taxes, the assessment and review processes are not identical.

Understanding which assessment process applies to your property is important before filing a grievance.

Nassau County Homeowners

Nassau County homeowners generally challenge assessments through the Nassau County Assessment Review Commission (ARC).

P.T.R.C. represents homeowners through the Nassau County assessment grievance process and helps determine whether further review may be appropriate.

Suffolk County Homeowners

Suffolk County includes multiple municipalities, each of which may have its own assessment procedures and deadlines.

Homeowners should identify the local assessing authority responsible for their property before beginning the grievance process.

P.T.R.C. helps Suffolk County homeowners review assessments and navigate the applicable process.

Frequently Asked Questions About Property Assessment

What is property assessment?

A property assessment is the value assigned to a property for property tax purposes.

What is assessed value?

Assessed value is the value assigned to a property by the applicable assessing authority for use in property tax calculations.

Is assessed value the same as market value?

No. Market value generally refers to what a property may reasonably sell for, while assessed value is used for property tax purposes.

Who determines a property assessment?

Property assessments are generally determined by local assessing authorities or assessors using the applicable assessment system for that municipality.

Why did my property assessment increase?

An assessment may increase because of market changes, reassessment, property improvements, corrections to property records or changes in local assessment practices.

Can I dispute my property assessment?

Yes. If you believe your assessment is excessive or incorrect, you may be able to challenge it through the applicable grievance process.

How do I lower my property assessment?

You cannot simply request a lower assessment without support. A successful challenge generally requires evidence showing why the assessment should be reduced.

Does property assessment affect property taxes?

Yes. Your assessment is used as part of the calculation that determines your property tax obligation. However, tax rates and other factors also affect the final tax bill.

How often are properties assessed?

The timing of property assessments and reassessments depends on the local assessment system and municipality.

What happens if my assessment is too high?

If you believe your assessment is too high, you may be able to file a property tax grievance and request that the assessment be reviewed.

Get Help Reviewing Your Property Assessment

Understanding your property assessment is the first step in determining whether you may be paying more than your fair share of property taxes.

If your assessment appears excessive compared with similar properties or available market information, it may be worth reviewing your options.

P.T.R.C., Inc. helps Long Island homeowners review their property assessments and determine whether filing a property tax grievance may make sense.

Learn more about Long Island property tax reduction with P.T.R.C.

 

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