Start with your assessor's office and a written record

Most property tax appeals begin with your local assessor's office, not a court. The assessor is the government official who sets the value of your property for tax purposes. Before you file a formal appeal, you typically have a window—usually 30 to 45 days after you receive your assessment notice—to request an informal review or file a formal protest directly with the assessor.

The first step is to get a copy of your assessment in writing. This document shows the assessed value, the property details the assessor used (square footage, lot size, condition, features), and often the comparable properties they referenced. Request this from your assessor's office in person, by mail, or online through your county's property records system. Keep all correspondence in one folder; you will need it if the appeal moves forward.

Read the assessment carefully against what you know about your property. Common errors include wrong square footage, missing information about damage or age, incorrect number of bedrooms or bathrooms, or a lot size that does not match your deed. If you spot a factual mistake, document it with photos, your deed, or a recent appraisal. These errors are often the easiest to overturn.

Key Takeaways

  • Your assessor's office is where most appeals start, and you usually have 30 to 45 days from receiving your assessment notice to file a protest or request review.
  • Request your full assessment in writing and compare it line by line against your property deed, recent appraisals, and what you know about your home's condition.
  • Factual errors—wrong square footage, missing rooms, incorrect lot size—are the strongest grounds for appeal and often require only documentation you already have.
  • If the assessor denies your appeal, you can escalate to a county board of review or appeals board, then to tax court if necessary, but each step has its own important date.
  • Hiring a property tax consultant or attorney makes sense if your home is expensive, the assessment is far above market value, or you have already lost at the assessor level.

File a formal protest with your assessor before the important date

Most counties require you to file a formal protest or appeal form with the assessor's office by a specific date. This date is usually printed on your assessment notice. Missing this important date often closes your right to appeal that year. If you are unsure of the important date, call your assessor's office and ask for it in writing.

The protest form itself is usually straightforward—one or two pages. You will state your name, property address, the assessed value you disagree with, and the value you believe is correct. You do not need to prove your number yet; you are straightforward putting the assessor on notice that you dispute the assessment. Some counties let you file online; others require a paper form mailed or delivered in person.

Attach supporting documents to your protest. These might include a recent professional appraisal, a comparative market analysis from a real estate agent, photos of damage or needed repairs, or a list of factual errors in the assessment (wrong square footage, missing features). Do not send originals; send copies and keep the originals for yourself. Send your protest by certified mail if you mail it, so you have proof of delivery.

Understand what happens after you file

After you file a protest, the assessor's office will either grant you an informal hearing or move your case to the next stage. An informal hearing is a conversation—sometimes in person, sometimes by phone or video—where you present your case and the assessor explains their valuation. You do not need a lawyer for an informal hearing, though you can bring one.

At the hearing, bring your supporting documents and be ready to explain why you believe the assessment is wrong. If you have an appraisal, bring it. If the assessment lists wrong details, bring evidence of the correct details. If comparable homes in your area sold for less, bring those sale prices. The assessor will listen and then decide whether to lower, keep, or (rarely) raise your assessment.

The assessor will send you a written decision. If they lower your assessment, the appeal is over. If they deny your appeal or do not lower it enough, you can move to the next level: usually a county board of review or appeals board. This board is separate from the assessor and hears appeals the assessor denied. You will have another important date—often 30 days—to file with this board.

Appeal to your county board of review or appeals board

If the assessor denies your appeal, your county's board of review or appeals board is the next step. This board is made up of county officials (not the assessor) who hear property tax disputes. The process is more formal than the assessor's hearing but still usually does not require a lawyer.

You will file a new appeal form with the board, again within a important date printed on the assessor's decision. Attach the same supporting documents you used before, plus the assessor's written decision and your response to it. Some boards allow you to submit everything by mail; others require an in-person hearing. Call the board's office to find out what they require and when your hearing will be scheduled.

At the board hearing, you will present your case again. The board will consider your evidence and the assessor's reasoning. Board decisions are usually final at the county level. If the board denies your appeal, you can take the case to tax court, but this is expensive and requires a lawyer in most states.

Know when to hire a property tax professional

A property tax consultant or attorney can handle your appeal from start to finish. They know local procedures, important date, and which arguments work in your county. They also know which assessments are worth fighting and which are not.

Hiring help makes the most sense if your home is worth a lot of money (so even a small percentage reduction saves you thousands in taxes), if the assessment is far above what comparable homes sold for, or if you have already lost at the assessor level and want to appeal to the board or court. Many consultants work on contingency—they take a percentage of the tax savings they win for you—so you do not pay upfront.

If you hire someone, make sure they are licensed in your state and have experience with property tax appeals in your county. Ask for references and find out what they charge. Some counties have lists of approved consultants; your assessor's office can point you to them.

Gather evidence that supports a lower value

The strongest evidence in a property tax appeal is a recent professional appraisal. If you had your home appraised for a mortgage, refinance, or insurance purposes in the last year or two, that appraisal is valuable. Bring it to your hearing. If you do not have an appraisal, you can order one from an appraiser, though it will cost $300 to $500.

Comparable sales data is also powerful. Real estate websites like Zillow, Redfin, and your county's property records show what similar homes in your area sold for recently. Print out three to five sales of homes similar to yours (same size, age, condition, neighborhood) that sold in the last six months to a year. If those homes sold for less than your assessed value, that is strong evidence your assessment is too high.

Document any problems with your property. Take photos of a roof that needs replacement, foundation cracks, outdated systems, or poor condition. Get written estimates for major repairs. If the assessor's description of your home does not match reality—if they say it is in excellent condition but it needs significant work—those photos and estimates prove the assessment was based on wrong information.

Meet important date and keep records of everything

Property tax appeals have strict important date at each stage. Missing a important date usually means you lose your right to appeal that year. Write down every important date on a calendar as soon as you receive it. These important date are typically printed on the assessment notice, the assessor's decision, and the board's hearing notice.

Keep a file with copies of everything: your original assessment, your protest form, all supporting documents, the assessor's written decision, your board appeal form, hearing notices, and any correspondence. If you end up in tax court, this file is your evidence. Take notes at any hearing you attend—write down what the assessor or board members said, what questions they asked, and what you said in response. These notes help you prepare if you appeal further.

If you move or your mailing address changes, update it with the assessor's office and the board. A missed notice because mail went to an old address can cost you a important date.

Frequently Asked Questions

How long does a property tax appeal take?

An informal hearing with the assessor usually happens within two to four months of filing your protest. If you appeal to the board of review, add another two to four months. Tax court can take a year or more. The total time from protest to final decision is often six months to two years, depending on how many stages you go through and how busy your county is.

Can I appeal if I already paid the higher tax amount?

Yes. If your appeal succeeds and your assessment is lowered, you will receive a refund of the overpaid taxes, usually with interest. Some counties refund you directly; others explore the refund to future tax bills. Ask your assessor's office about their refund process.

What if I disagree with the board's decision?

You can file an appeal in tax court, but this requires a lawyer in most states and costs money upfront. Tax court is worth considering only if the assessment is significantly wrong and the potential tax savings are large enough to justify legal fees. Your property tax consultant or attorney can advise whether tax court makes financial sense in your situation.

Do I need to hire a lawyer for the assessor's hearing?

No. Most people handle the assessor's hearing themselves with their own documents and evidence. A lawyer is more useful if you appeal to the board or go to tax court. If you are unsure whether you need one, consult a property tax professional first; they can tell you whether your case is strong enough to win without legal help.

What happens to my property taxes while I'm appealing?

You typically pay taxes based on the current assessment while your appeal is pending. If you win and the assessment is lowered, you will receive a refund. Some counties allow you to pay under protest, which protects your right to a refund if you win. Ask your assessor's office whether this option is available in your county.