To fight a property tax increase, file an appeal with your local assessor or review board showing that the assessed value is wrong, and back it up with evidence: corrections to the property record card, recent sales of comparable homes, a professional appraisal, or documentation of conditions that reduce your home’s market value. The deadline is short, the process is designed for homeowners to use without an attorney, and the reduction, if you win, carries forward into future tax bills until the next reassessment.
Start With the Assessment Notice and Property Record Card
Before you build any argument about value, look for factual mistakes. Your local assessor keeps a property record card for every parcel, listing the data used to calculate your home’s value: square footage, lot size, number of bedrooms and bathrooms, whether the basement is finished, the year built, and the overall condition rating. Those inputs feed the valuation directly. If the card shows a finished basement you don’t have, or four bedrooms when you have three, that one error can inflate your assessment by thousands of dollars.
You can usually pull your property record card from the assessor’s website or request a copy in person. Read it line by line against your actual home. Lot dimensions, building materials, garage capacity, and notes about renovations are all worth checking. Assessors work from aerial photos, building permits, and mass-appraisal models that value thousands of properties at once, and those models routinely miss property-specific details like deferred maintenance, an oddly shaped lot, or a noisy location. When the input data is wrong, the number that comes out is wrong too, and a correction on the card is often the fastest path to a lower assessment.
Grounds for an Appeal
If the record card is accurate but the value still looks too high, you need a legal basis. Appeals usually rest on one of three arguments, and you can raise more than one at the same time.
Overvaluation
The most common argument is that the assessed value exceeds your property’s actual market value, meaning what a willing buyer would pay a willing seller in an open transaction with neither side under pressure. If you bought your home recently for less than the assessed value, that purchase price is strong evidence on its own. A professional appraisal showing a lower figure works the same way.
Lack of Uniformity
Even if your value is technically defensible, you have grounds if similar homes in your area are assessed at a lower percentage of their market value. This is a uniformity or equity argument. The tax burden is supposed to be shared fairly among comparable properties. If a neighbor’s house has the same square footage, age, and features but sits at an assessment 20 percent below yours, the system is treating you unequally.
Classification Errors
Properties are grouped into tax classifications, and each may carry a different rate. A home coded as commercial, a single-family residence tagged as multi-unit, or agricultural land classified as residential can produce a much higher bill. Classification corrections are sometimes handled through a separate administrative process rather than the standard appeal, so ask the assessor’s office about the right form and timeline.
Try an Informal Review First
Many assessor offices allow you to request an informal review before filing a formal appeal, and this step is free. You contact the office, point out the errors or comparables you’ve found, and ask them to take a second look. No hearing, no board. If the assessor agrees the value is too high, the correction happens without any of the formal process.
Most easy wins happen here. Factual errors on the record card, obvious data mistakes, and straightforward comparable-sales arguments often get resolved at this stage because the assessor’s staff would rather fix a real error now than defend it at a hearing later. If the informal review doesn’t produce a satisfactory result, you still have every right to file a formal appeal. Treat the informal review as a low-cost first attempt, not a replacement for the formal process.
Building the Evidence
Whether you’re heading into an informal conversation or a formal hearing, the case lives or dies on evidence. The assessor has data and a model backing their number. You need data backing yours.
Comparable Sales
Comparable sales are the backbone of most appeals. Look for three to five homes that sold within the past year, sit near your property, and share similar characteristics: age, size, style, lot dimensions, and condition. The point is to show that actual sale prices in your market don’t support the assessor’s number. You can pull recent sales from your county’s online property records, real estate listing sites, and MLS records that agents can access. Proximity matters. A sale two blocks away carries more weight than one across town, even if the house itself is a closer match.
Professional Appraisal
A formal appraisal from a licensed appraiser carries weight because it follows standardized methodology and comes from an independent, credentialed source. Expect to pay $300 to $600 for a residential appraisal, depending on property size and local market. That cost is worth it when the potential savings are substantial; for a modest overassessment, comparable sales and a corrected record card may be enough on their own. If you do get an appraisal, make sure it values the property as of the assessment date, not the date the appraiser visits.
Photos and Condition Evidence
If your home has problems the assessor doesn’t know about, document them. Foundation cracks, an aging roof, outdated systems, flood damage, or proximity to a noisy road all affect market value. Dated photographs, repair estimates from contractors, and inspection reports give the review board something concrete to weigh against a model that almost certainly assumed your home is in average condition.
Filing the Formal Appeal
Every jurisdiction sets a deadline, and missing it almost always means waiting until next year. Deadlines vary. Some places give you 30 days from the date the assessment notice is mailed. Others set a fixed calendar date, sometimes as early as January and sometimes as late as November. Your assessment notice will state the deadline or point you to where it’s published. Treat it as immovable.
Appeal forms are available from the assessor’s office or its website. The form typically asks for your parcel identification number, the assessed value you’re disputing, the value you believe is correct, and the basis for your claim. Attach your comparable sales data, any appraisal, photographs, and a corrected version of the property record card if it contains errors. Submit everything as a complete package.
Filing methods include online portals, in-person delivery, and certified mail. If you mail your appeal, use certified mail with return receipt so you have proof of the date. Some jurisdictions charge a small filing fee, though many waive it for owner-occupied residential property. Keep the stamped or receipted copy. If a dispute ever comes up about whether you filed on time, that receipt is your only protection.
Keep Paying Your Taxes During the Appeal
Filing an appeal does not pause your tax obligation. Continue paying your property taxes on time while the appeal is pending. Stopping payment in anticipation of a reduction piles up interest and penalties that can exceed anything you’d win, and in some jurisdictions falling delinquent can jeopardize your right to continue the appeal.
Some areas allow or require you to pay “under protest,” meaning you pay the full amount but formally note on your payment that you’re disputing the underlying assessment. That notation preserves your right to a refund if you win. Check with the local tax collector’s office about whether protest language is required or just recommended. Either way, pay the bill on time.
The Hearing
If the case isn’t resolved informally or through a pre-hearing settlement, it goes before a review board. Depending on your location, this body may be called a Board of Equalization, Board of Review, Board of Tax Appeals, or Assessment Appeals Board. The members are usually appointed officials rather than judges, and the proceedings are less formal than a courtroom trial.
What Happens in the Room
You present your evidence and explain why the assessment is too high. The assessor’s representative responds, generally by walking the board through the data and methodology behind the original number. Both sides can ask questions. Residential hearings are usually brief, often 15 to 30 minutes. Boards hear dozens of cases a session, so being organized and concise helps. Lead with your strongest evidence, whether that’s a factual error on the record card, a professional appraisal, or comparable sales that clearly undermine the assessed value.
Burden of Proof
In most jurisdictions, the homeowner bears the initial burden of proving the assessment is wrong, typically by a preponderance of the evidence. You need to show it’s more likely than not that the value is inaccurate. Saying “my taxes are too high” doesn’t meet that standard. Specific, documented reasons do. Some states shift the burden to the assessor when the increase exceeds a set percentage over the prior year, which gives the homeowner a real advantage in those cases.
Settlements Before the Hearing
Don’t be surprised if the assessor’s office reaches out before the hearing date to propose a settlement. It happens regularly. After reviewing the evidence you filed, the assessor may agree to a partial reduction without a full hearing. Settlements are put in writing, state the agreed-upon assessment, and specify the tax year covered. If the offered reduction seems reasonable, accepting saves time and eliminates the risk that the board sides entirely with the assessor. If it doesn’t go far enough, decline and proceed to the hearing.
The Decision
The board issues a written decision, usually mailed within a few weeks. It states the final assessed value and explains any adjustment. If the board reduces your assessment, the lower value becomes the basis for your tax bill. If the board upholds the original assessment, the decision letter typically explains your options for further appeal.
After the Decision
A successful appeal lowers your assessed value, which lowers the tax bill going forward. If you’ve already paid taxes on the higher assessment, most jurisdictions either refund the difference or credit it to your next bill, with credits being the more common approach. The reduction applies to the tax year under appeal, and the corrected value usually carries forward as the baseline for future assessments until the next reassessment cycle.
Losing at the local board level is not the end. Every state provides a path for further review. The next step is usually an appeal to a state-level body, such as a state board of equalization or state tax court. Beyond that, you can seek judicial review in the regular court system. Court appeals involve formal litigation, often require a professional appraisal, and may require you to post a bond. The filing window is typically short, often 30 to 90 days from the board’s decision. If you’re weighing that route, talk to a property tax attorney before the deadline passes.
Exemptions That Also Lower the Bill
An appeal challenges the assessed value. Your tax bill also depends on the exemptions you qualify for, and many homeowners leave money on the table by never applying. Exemptions reduce the taxable portion of your assessment regardless of whether the underlying value changes, so they’re worth checking alongside any appeal.
- Homestead exemption. Available in most states for owner-occupied primary residences. It removes a fixed dollar amount or percentage from your assessed value. Savings vary by location but can amount to several hundred dollars a year.
- Senior citizen exemptions and freezes. At least 17 states offer some form of property tax relief for older homeowners, typically starting at age 65. Relief may come as an additional exemption, a freeze that locks your assessment or bill at a base-year amount, a deferral that postpones payment until the home is sold, or a direct credit against taxes owed.
- Veteran and disability exemptions. Every state offers some form of property tax relief for disabled veterans, ranging from partial exemptions to full elimination depending on disability rating. Many states extend additional exemptions to non-veteran homeowners with qualifying disabilities.
Exemptions are not automatic. You must apply, and most have annual renewal or periodic re-certification requirements. If you’ve owned your home for years without applying for an available exemption, you’ve been overpaying that entire time. Check your local assessor’s website for the full list where you live.
When to Hire a Professional
Most residential appeals are straightforward enough to handle yourself, especially when the issue is a factual error or a clear overvaluation supported by recent comparable sales. The process is built to be accessible without legal training.
Professional help makes more sense when the stakes are high or the issues get complicated. Property tax attorneys typically charge $150 to $500 per hour, with simple residential cases running $500 to $1,500 total. Some property tax consultants work on contingency, taking a percentage of the savings they achieve, which means you pay nothing upfront and nothing if they don’t win. That arrangement can be attractive for higher-value properties where the potential savings justify the fee.
Consider bringing in help if the property is assessed at a high value and the potential annual savings are significant, if the legal issues involve classification disputes or income-producing property, if you’ve already lost at the local level and are considering a court appeal, or if you don’t have the time to gather evidence and attend a hearing. For a modest home with a few thousand dollars at stake, doing it yourself is usually the right call. For a property worth several hundred thousand dollars or more with a substantial overassessment, professional representation often pays for itself.