To appeal a property tax assessment, pull your property record from the assessor’s office, identify the specific ground for your protest, file the written appeal before your jurisdiction’s deadline, and present your evidence first at an informal review and then, if needed, at a formal hearing. Homeowners who file appeals win reductions more often than most people expect, and the majority of successful appeals resolve before any board hearing. The one thing that ends an appeal before it starts is a missed deadline.
Find Your Grounds Before You File
An appeal needs a specific reason, not a general sense that your taxes feel high. There are four grounds that actually work, and figuring out which one fits your situation shapes everything else you do.
Errors in the Property Record
This is the strongest and simplest ground. Assessed values are built on data about your home’s size, bedrooms, condition, age, and features, and assessors rarely inspect every property in person during a reassessment. If the record lists four bedrooms and you have three, shows a finished basement that doesn’t exist, or overstates your square footage, the value is built on bad inputs. Pull your property record card from the assessor’s website and check it line by line. When you find an error and document it, the correction is often automatic.
Assessed Value Above Market Value
Even when the physical details are right, the number can overshoot what your home would actually sell for. Market conditions shift, the assessor’s model may miss factors like a busy road behind the house, or a neighborhood may have depreciated. If comparable homes recently sold for less than your assessed value, you have an overvaluation argument.
Unequal Appraisal
You don’t have to prove your value exceeds market value to win on this ground. You show that similar homes nearby are assessed at a lower rate relative to their market value. If your home and your neighbor’s home are nearly identical but yours is assessed 20 percent higher, the burden is being distributed unfairly. This works even when all the values in the neighborhood technically sit below market.
Missing Exemptions
A homestead, senior, disability, or veteran exemption reduces the taxable portion of your home’s value. If you qualify but the exemption was never applied, your bill is higher than it should be. Many jurisdictions allow you to claim a missing exemption retroactively, sometimes recovering overpayments from prior years. Check with your local assessor for the exemptions you’re eligible for and whether they’re on your account now.
Know Your Filing Deadline
Every jurisdiction sets a deadline for property tax protests, and there is almost never an exception for late filings. The window typically opens when you receive your assessment notice and closes within 25 to 45 days, though some places use fixed calendar dates. The deadline is usually printed on your assessment notice itself, and most assessor websites publish an appeal calendar.
Mark the date the moment you open the notice. If your deadline passes, you have no right to a hearing no matter how strong the evidence is. When in doubt, call the assessor’s office that week.
Build the Evidence Package
An appeal is only as strong as the documentation behind it. Reviewers hear hundreds of cases, and the homeowners who win are the ones who arrive organized.
Comparable Sales
Comps are the backbone of most appeals. Look for homes that sold recently and resemble yours in size, age, condition, and location. The best ones sit in the same subdivision or within a mile, sold within the last 12 months, and fall within roughly 10 to 15 percent of your home’s square footage. Three to five strong comps beat a long list of weak ones. A comp two blocks away that sold last month carries far more weight than one three miles away that sold 18 months ago.
Look for sales below your assessed value. Skip distressed sales like foreclosures unless your own property has similar issues. Many assessor websites offer free tools to search recent sales, so start there before paying for third-party data.
Photographs and Condition Evidence
If your home has physical problems that hurt value, document them with clear, dated photos. Foundation cracks, water damage, an aging roof, outdated electrical or plumbing, and deferred maintenance all reduce what a buyer would pay. The mass appraisal model probably doesn’t know about any of it. Photos paired with repair estimates from a contractor make the condition argument concrete.
Independent Appraisals
Hiring a licensed appraiser for a formal opinion of value adds credibility, especially at a formal hearing. A residential appraisal typically runs several hundred dollars, so weigh that cost against the potential tax savings. If your home has unusual features that comps alone don’t capture, a professional appraisal can be worth it. Confirm the appraiser is licensed or certified in your state, and ask whether they’ve done property tax work before. Review boards give more weight to a credentialed opinion than to a homeowner’s estimate.
File the Protest
The document goes by different names depending on where you live: notice of protest, assessment appeal application, or petition for review. Most assessor offices post the form online, and many now accept electronic filing. You’ll list your property identification number, the current assessed value, the value you believe is correct, and the reason for your protest. Attach your comps, photos, and any appraisal report. Make sure your contact information is accurate so hearing notices reach you.
Filing fees at this stage are minimal, and many jurisdictions charge nothing. The real cost is the time you spend on the evidence.
The Informal Review
Before you ever face a board, most jurisdictions offer an informal conference with a staff appraiser. A large share of successful appeals resolve here. You sit down with the appraiser, walk through your evidence, and they compare it against their data. If you’ve found a factual error in the property record, this is often where it gets corrected on the spot.
Come prepared to listen. The appraiser may point out a recent nearby sale that supports the higher value, or an adjustment they already made that you missed. If they agree, you’ll receive a revised assessment notice. If they don’t, you move to the formal hearing with nothing lost. The informal review doesn’t waive your right to proceed.
The Formal Hearing
When the informal route doesn’t produce a result you can live with, the next step is a hearing before a local review board, often called a board of equalization or assessment appeals board. These boards are typically made up of appointed community members or trained hearing officers rather than assessor staff.
The hearing is more structured than the informal meeting but far less formal than a courtroom. You’ll have a set amount of time to present. Lead with your strongest evidence, whether that’s a clear data error, a set of comps, or a professional appraisal. Skip the general complaint that taxes are too high. Board members hear it constantly and it doesn’t move them. What does move them is a concise factual case showing that the number is wrong and what the right number is.
Bring copies of every document you plan to reference, and expect that some boards want a copy for each member. The assessor’s office will present its justification, and you’ll have a chance to respond. Answer board questions straightforwardly.
One thing many homeowners don’t realize: in some states, the board has authority to raise your assessed value, not just lower or sustain it. Most states prohibit this, but a handful allow it. Check your jurisdiction’s rules before filing. Increases during a homeowner-initiated appeal are rare in practice, but the possibility exists in certain places.
The decision usually arrives by mail. Some boards announce results at the hearing; others take weeks or a few months depending on caseload.
Appealing Beyond the Local Board
If the local board upholds a value you still believe is wrong, most states offer at least one more level of review. This typically means filing a notice of appeal with a state tax commission, state board of tax appeals, or similar body. Deadlines at this stage are tight, often 30 days from the date the local board mails its decision, with no extensions.
Some homeowners bypass the state administrative body and file directly in court for judicial review. Court proceedings involve formal rules of evidence, filing fees, and a much bigger time commitment. Hiring an attorney is worth serious consideration if the tax dollars at stake justify it. Property tax attorneys and consultants sometimes work on contingency, taking a percentage of the tax savings rather than charging upfront fees, which can make professional help accessible even when the outcome is uncertain.
Keep Paying While You Appeal
Filing an appeal does not pause your obligation to pay. You owe the full bill by the due date whether or not your protest is pending. Skip a payment and you’ll accrue interest and penalties. If your appeal succeeds, you receive a refund or credit for the overpayment. Pay now, collect later.
What Happens After You Win
A successful appeal lowers your assessed value and your tax bill going forward. If you pay through a mortgage escrow account, don’t expect your monthly payment to drop right away. Servicers typically review escrow accounts once a year, usually in the fall, and adjust monthly payments based on the new tax figures at that time. If the review shows overpayment, you’ll get a refund check or a reduced monthly payment. You can contact the servicer with documentation of the change, but most won’t adjust mid-cycle.
A reduction this year doesn’t lock in lower taxes forever. Assessed values can rise at the next reassessment, and tax rates themselves change. Reassessment cycles vary widely, with some jurisdictions reassessing annually and others every two to five years. If you’ve appealed successfully once and the underlying facts haven’t changed, you may need to appeal again after the next reassessment to hold the lower value.