Property Tax Assessment vs. Market Value: Why They Are Not Always the Same

Market value, on the other hand, is what a willing buyer might pay for your home in the open market. When the assessed value is higher than the market supports, you may have a reason to challenge your property tax assessment.

The assessor may use property records, neighborhood sales, land value, building size, age, condition, and other data to estimate value. The problem is that mass appraisal systems do not always capture the details of your individual home.

If your property record is wrong, your home needs repairs, or your neighborhood sales do not support the assigned value, the assessment may be too high.

Market value can change quickly. Assessments may lag behind the market or rely on older data. That means your assessment may not reflect what is actually happening in your neighborhood right now.

• The assessor is using older sales data.
• The county has incorrect property information.
• Your home is in worse condition than similar homes.
• Recent comparable sales are lower than your assessed value.
• The local market has softened since the last valuation date.
• Your assessment includes features your home does not actually have.
• Your home has negative value factors, such as traffic, drainage, noise, needed repairs, or outdated finishes.

Even small errors can matter. If your local tax rate is high, an inflated assessment can cost you hundreds or thousands of dollars over time.

Mass appraisal can be useful for managing thousands of properties, but it is not perfect. It may not know that your basement floods, your kitchen has not been updated in 30 years, your roof needs replacement, or your home backs up to a noisy road.

That is why homeowners should review their assessment every year instead of assuming the number is automatically correct.

Examples may include:

• Your assessed value is higher than recent sales of similar homes.
• Your property record lists the wrong square footage.
• Your home is assessed like an updated home, but it is outdated.
• Your assessment includes a finished basement, garage, bath, or addition that is incorrect.
• Your home has condition issues not reflected in the assessment.
• Similar homes nearby are assessed lower.

The key is evidence. A property tax appeal is stronger when it includes comparable sales, property record corrections, photos, repair estimates, or other documents that support a lower value.

If similar homes sold for less than your assessed value, that may help support a lower assessment. The strongest comps are usually closed sales, not active listings, because they show what buyers actually paid.

When reviewing comps, look for:

• Recent sale date
• Similar square footage
• Similar lot size
• Similar bedroom and bathroom count
• Similar age and style
• Similar condition
• Similar neighborhood or school district

A few strong comps are usually better than a long list of weak comparisons.

Common mistakes include:

• Incorrect square footage
• Wrong number of bedrooms or bathrooms
• Finished basement listed as larger than it is
• Garage, deck, porch, or addition listed incorrectly
• Wrong lot size
• Incorrect condition rating
• Incorrect property classification

If the assessor’s record says your home has more value than it really does, correcting the record may help lower your assessment.

You may also qualify for exemptions or reductions, such as homestead, senior, veteran, disability, surviving spouse, low-income, agricultural, or local programs.

That means lowering your tax bill may involve both reviewing the value and checking whether every available exemption has been applied.

• A new assessment notice arrives
• Nearby homes sell for less than your assessed value
• Your property tax bill increases
• You recently bought the home
• You made no improvements but your value increased
• Your home has condition issues
• You may qualify for a new exemption
• You believe the property record is wrong

Appeal deadlines are often short. Waiting too long can mean missing the opportunity for that tax year.

Once your report is complete, you receive comparable property data, mailing instructions, and next steps for your local assessor or appeal office.

You keep 100% of your savings. We do not take a percentage of your tax reduction.

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If your assessed value is higher than comparable sales, your property record is wrong, or your home has condition issues, it may be worth reviewing your assessment and preparing an appeal.

The goal is simple: make sure you are not paying property taxes based on a value that is too high.

Is assessed value the same as market value?

No. Assessed value is the value used for property tax purposes. Market value is what the home would likely sell for in the open market. Depending on local rules, the two values may be different.

Can I appeal if my assessed value is higher than market value?

In many areas, yes. If comparable sales or other evidence show your assessment is too high, you may be able to file an appeal before the local deadline.

What evidence helps prove market value?

Recent comparable sales, photos, repair estimates, appraisals, property record corrections, and assessment comparisons can all help support a lower value.

Why did my assessment increase if I did not improve my home?

Assessments can increase because of market changes, neighborhood sales, reassessment cycles, tax rate changes, or property record updates. You should still review whether the increase is supported by the evidence.

Can exemptions reduce property taxes even if my assessment is correct?

Yes. Homestead, senior, veteran, disability, low-income, agricultural, and other local exemptions may reduce taxes even when the assessed value itself is not changed.

How often should I review my property tax assessment?

You should review it every year, especially when a new notice arrives, your bill increases, nearby homes sell for less, or you may qualify for a new exemption.