A property tax appeal before a board of review or equalization is the first formal step for challenging an assessment you believe is too high. You file by the deadline printed on your assessment notice, present evidence that your property’s assessed value does not match its market value, and ask the board to lower it. The board can raise, lower, or leave the assessment unchanged, and in most jurisdictions you have to go through this local hearing before any state tax court or higher tribunal will hear your case.
What the Local Board Can Do
The board’s job is to make sure every property on the roll is valued fairly and consistently against others in the same class. It can adjust an assessment up or down, correct a misclassification, or leave the assessor’s number alone. If one house on a block sits at 95% of market value while a comparable one next door sits at 70%, the board has authority to bring them into line.
Members are typically local elected officials, appointed citizens, or a mix. They act as a quasi-judicial body: they hear evidence, ask questions, and issue binding decisions. They are not moved by hardship arguments or by the size of your tax bill in the abstract. Their decisions rest on evidence about value.
Names and procedures vary. Some states call them boards of equalization, others boards of review or assessment appeals boards, and the rules on hearings, deadlines, and evidence differ from one jurisdiction to the next. The purpose is the same everywhere: catch errors, ensure uniformity, and give owners a structured way to be heard before the tax bill becomes final.1Constitution Annotated. Amdt14.S1.5.7.1 State Taxes and Due Process Generally
The Assessor Starts With the Advantage
Walk into a hearing knowing the assessor’s original value carries a legal presumption of correctness. The board will assume the number is right unless you prove otherwise. You carry the burden of proof.
The standard in most places is a preponderance of the evidence: you must show your value is more likely correct than the assessor’s. If the evidence is evenly balanced, the assessor wins. A few jurisdictions set a higher bar for certain challenges, but preponderance is the common threshold.
There are two general ways to overcome the presumption. You can show the assessor did not follow accepted appraisal practices or applicable law in reaching the value. Or you can present market evidence, such as comparable sales, that contradicts the assessed number. The strongest appeals do both.
Check the Filing Deadline First
Every jurisdiction imposes a strict deadline, and missing it almost always means waiting until the next assessment cycle. Deadlines vary widely. Some states give as few as 25 days from the mailing of the assessment notice. Others allow 90 days or tie the deadline to a fixed calendar date. The deadline is usually printed on the notice itself. If it is not, call the assessor’s office or the board clerk before doing anything else.
The appeal form is typically available from the local assessor’s office, the county clerk, or the jurisdiction’s website. You will need your parcel number, the current assessed value, and the value you believe is correct. Some forms ask you to identify the basis for the challenge: market value, unequal assessment compared to similar properties, or an error in the property’s physical description.
Filing fees are modest where they exist at all. Many jurisdictions charge nothing at the local board level. Submit by the method the board requires, whether in person, by certified mail, or through an online portal, and keep a copy of everything along with proof of the date you filed.
Try an Informal Review Before the Hearing
Before the formal appeal, contact the assessor’s office and ask for an informal review. Many jurisdictions encourage or require this step, and it resolves a surprising number of disputes without a hearing. You sit down with someone from the assessor’s office, walk through the data they have on your property, and point out anything you think is wrong.
The meeting has two payoffs. First, you get to see exactly what is in the property record card: square footage, construction type, condition rating, number of rooms, and adjustments for features like a finished basement or detached garage. Errors here are more common than owners expect. An extra half-bath that doesn’t exist, a garage listed as finished when it’s bare concrete, or square footage taken from outdated blueprints can all inflate a value. Correcting a factual error at this stage is the fastest way to a lower assessment.
Second, if the informal review does not resolve it, you now know the assessor’s position and the data they will rely on at the hearing. You can build your evidence to counter their strongest points directly.
Evidence That Actually Moves the Board
What you bring to the hearing decides the outcome. Emotional arguments about affordability or the size of the tax bill carry no weight. The board wants objective data showing that the assessed value does not match what your property would sell for on the open market.
Comparable Sales
The single most persuasive piece of evidence is a set of recent sales of similar properties near yours. Most jurisdictions expect at least three comparable sales, and some allow up to five. Sales should be as recent as possible, ideally within the last year, and the properties should match yours in the important characteristics: lot size, living area, bedrooms and bathrooms, age, construction quality, and condition. A four-bedroom colonial in good condition is not a useful comparable for a two-bedroom ranch that needs a new roof.
Perfect comparables rarely exist, so be ready to explain adjustments. If a comparable has a two-car garage and yours has a one-car garage, note the difference and estimate its dollar impact. Same for lot size, finished basement area, or proximity to a busy road. Boards are more receptive to modest, logical adjustments than to cherry-picked sales that happen to be low.
Not every sale qualifies. Transactions between family members, foreclosure sales, and deals with unusual concessions often do not reflect market value. Stick to arm’s-length transactions where both parties acted voluntarily.
Photographs and Condition Documentation
Photographs of the interior and exterior are essential, especially for conditions the assessor would not have seen during a drive-by. Foundation cracks, water damage, outdated electrical or plumbing, a failing roof, deferred maintenance: all of it reduces value. Date the photos and organize them so the board can quickly see what you are describing.
Physical limitations that affect marketability count too. A steep lot, poor drainage, highway proximity, an unusual layout that limits functional use. Mass appraisal systems sometimes miss these entirely.
A Professional Appraisal
A licensed appraiser’s opinion of value is the strongest single piece of evidence you can present, but it costs money. A standard residential appraisal typically runs between $300 and $600, with complex or high-value properties running higher. Whether it makes sense depends on the size of the overassessment. If you are disputing a $5,000 overassessment in a jurisdiction with a 1.5% effective tax rate, annual savings of roughly $75 may not justify a $500 appraisal. If the overassessment is $50,000, the math looks very different.
What Happens at the Hearing
You will receive a notice with the date, time, and location. Formats vary, but the structure is consistent. The assessor presents first, explaining the basis for the valuation. You present next. Board members may ask questions of either side.
Time is limited. Each side often gets somewhere between five and fifteen minutes, though boards frequently allow more when the evidence is complex. This is not the place for a rambling narrative about the neighborhood. Lead with your strongest evidence: a professional appraisal, a set of comparable sales, or a clear factual error in the property record. Bring hard copies of photos organized in a folder so each board member gets their own set.
Specificity persuades. “My taxes are too high” gives the board nothing to act on. “The assessor lists my home at 2,100 square feet, but actual living area is 1,850, and here are three comparable sales within half a mile that closed in the last eight months at an average of $185 per square foot” gives the board a reason to move. Stay factual and answer questions directly. Credibility matters as much as the numbers.
After both presentations, the board deliberates. Some announce the result at the hearing. Others mail a written decision within a few weeks. The notice will state the final valuation and explain how to appeal further.
The Risk of a Higher Assessment
Filing does not guarantee your value goes down. Boards have the authority to raise an assessment if the evidence, including the assessor’s own review prompted by your appeal, shows the property was undervalued. It is uncommon, but it happens. If your own comparable sales support a value at or above your current assessment, you may be handing the board a reason to increase it. Run the numbers honestly before you file, and save the appeal for cases where the gap between the assessment and the market evidence is clear.
Representing Yourself or Hiring Help
At the local board level, property owners almost always have the right to represent themselves, and most do. An attorney is not required. You generally have the option to bring one, or in many jurisdictions to send an authorized representative. Who qualifies varies: some states accept anyone with a signed power of attorney, others limit representation to licensed attorneys, appraisers, real estate brokers, or certified public accountants.
Property tax consultants take appeals on behalf of homeowners, usually on contingency of 25% to 50% of the first year’s tax savings. Nothing upfront, but if the consultant wins a reduction they take a significant share of it. For a modest reduction, the fee may consume most of the savings. For a large reduction on a high-value property, the economics can work. Ask about the fee structure, the consultant’s track record in your jurisdiction, and whether the fee applies only to the first year or to multiple years.
After the Decision
If You Win
A reduction cuts the tax you owe. How you see the savings depends on timing. If you already paid the full bill for the year, the jurisdiction will typically issue a refund, though processing can take several months. If you paid only part, the overpayment from the first installment is usually credited to the remaining balance. If the bill has not come due, the next one will reflect the lower value.
In most jurisdictions, the reduced assessment stays in place until the next reassessment cycle unless something about the property changes. Reassessment schedules vary; some are annual, others run every few years. A win resets the starting point, but it does not lock the value in permanently.
If You Lose
A local decision is not the end. Nearly every state provides at least one additional level of review, such as a state board of tax appeals, a property tax appeal board, or a state tax court. The deadline to file at the next level is typically short, often 30 days from the date of the local board’s written decision. Read the notice carefully and act quickly.
Further appeals tend to be more formal, with stricter evidentiary rules, longer timelines, and sometimes filing fees. If you did not use a professional appraiser or attorney at the local level, consider whether the stakes justify hiring one now. Higher tribunals generally require exhaustion of local remedies, so having gone through the local hearing is what qualifies you to proceed.1Constitution Annotated. Amdt14.S1.5.7.1 State Taxes and Due Process Generally