What to say when you call the assessor's office about a high assessment

Last updated 2026-07-09

Why the first call matters more than most homeowners think

Most people who open a shocking assessment notice do one of two things. They call the assessor's office furious, or they toss the notice and miss the deadline. Both cost money.

The assessor's office runs thousands of property records. The person who answers the phone almost never set your value. They're administrative staff, sometimes a deputy assessor, occasionally a trained appraiser. Sixty polite, organized seconds beat ten angry minutes every time.

Here's what few homeowners realize. A large share of assessment errors get fixed before a formal appeal is ever filed. A 2019 analysis by the Lincoln Institute of Land Policy found that informal review processes resolve a substantial portion of disputes at the county level, often within weeks ^[1]. The formal hearing is your backup, not your opening move.

So treat that first call as a fact-finding trip, not a fight. You're not trying to win yet. You're learning how your value got set and setting yourself up for a strong challenge.

What information should you have ready before you call?

Pull these together before you dial. The call moves faster with them in front of you.

Your parcel number (also called APN, PIN, or tax account number). It's on your assessment notice or your last tax bill. Every county system runs on this number. If you don't have it, most county websites let you look it up by address.

Your assessment notice. Read it closely. Note the assessed value, the "market value" or "full cash value" the assessor used, and the notice date. Some counties assess at 100% of market value. Others assess at a fraction, like Illinois residential property at 33.3% of market value, or California's system under Proposition 13, which caps annual increases in assessed value at 2% ^[2]. Know which system your county uses and you'll avoid confusion on the call.

Your last tax bill. This shows the levy rate applied to your assessed value. It helps you figure roughly how much each dollar of over-assessment costs you a year.

Your own rough estimate of market value. No formal appraisal needed yet. Pull three to five recent sales of similar homes near yours from Zillow, Redfin, or the county's own sales search. Write them down. You won't share them on this first call, but knowing your number gives you spine.

The appeal deadline. This is the one thing you must leave the call knowing if it isn't printed on your notice. Miss the deadline and your options close, sometimes for a full year.

What exactly should you say when someone answers?

Open simple and direct. Here's a word-for-word script you can bend to fit:

*"Hi, my name is [your name] and my parcel number is [number]. I just received my assessment notice and the value looks a lot higher than what similar homes near me have sold for. I'd like to understand how the value was set and what my options are to have it reviewed."*

That's the whole opener. You've given your name, your parcel, your concern, and your ask. No accusations. No ultimatums.

From there the call usually splits one of two ways. The staffer pulls up your record and starts explaining, or they transfer you to a specific department. Either way, work through this checklist:

1. What assessment date or "valuation date" was used to set my value? 2. What comparable sales did the assessor use to reach this number? 3. Can I get a copy of my property record card? 4. Is there an informal review process before I file a formal appeal? 5. What's the exact deadline to file a formal appeal, and where do I file it? 6. Is there a fee to appeal, and how long does the process usually take?

Write down every answer. Get a name and extension if you can. If they're vague about the deadline, push gently: "Just to confirm, the last day I can file is [date]?" Nail it down in writing by asking them to email it, or pull it from the county website after you hang up.

How do you ask for your property record card?

The property record card (sometimes called a field data sheet or appraisal card) is the assessor's internal description of your property. It lists the square footage they recorded, the bedroom and bathroom count, the year built, the basement finish level, any outbuildings, and the condition grade an appraiser assigned.

Errors on this card drive a lot of inflated assessments. Counties carry stale data for years. A report from the Urban Institute on property tax equity found that data quality problems in assessor records contribute to systematic over-assessment, and that the burden falls hardest on lower-income neighborhoods ^[3].

To request it, say: *"I'd like a copy of the property record card for my parcel. Can you email it to me, or is there a way to download it online?"*

Many counties post these cards right on the parcel search portal. If yours does, the staffer will point you there. If not, they may ask for a public records request. In most states, property record cards are public records under open records or freedom of information statutes. You have a right to them.

When the card arrives, check every field against reality. Wrong square footage. A finished basement logged as unfinished, or the reverse. A phantom bathroom. A garage that was never built. Any factual error is grounds for a correction, sometimes without a formal appeal at all.

What comparable sales should you ask about?

Mass appraisal, which nearly every county uses, sets values by grouping similar properties and applying recent comparable sales, called "comps" ^[4]. The assessor isn't appraising your house one at a time. They're running statistical models across whole neighborhoods.

That's why the sales window matters. In most places the valuation date is a fixed date in the past (January 1 of the tax year is common), and comps come from a window of usually 12 to 24 months before that date. If the assessor leaned on peak-market sales from 18 months ago and values have since slipped, that's an argument you can make.

Ask directly: *"What time period were the comparable sales drawn from, and can you tell me which specific sales supported my assessed value?"*

Not every office hands over a detailed list on the phone. Some point you to formal discovery during an appeal. But many will share, and when they do, write them down. You'll test those properties against your own research.

If their comps are bigger homes, homes in better shape, or homes on larger lots, that's the inequity argument that wins at hearings. The Lincoln Institute reports that comparable-sales challenges are the most common and most successful form of appeal evidence ^[1].

For how comps work in large urban counties, see how cook county tax assessor tax bill and la county property tax offices run their mass appraisal systems, since both keep large public comp databases.

What tone works best and what should you avoid saying?

Assessor staff field complaints all day. They aren't your enemy, but they've heard every version of "this is outrageous" a dozen times this week. What cuts through is calm and specific.

Lines that work:

• "I found three sales nearby that closed well below my value. I want to understand the gap."
• "The record card shows 2,400 square feet but my home is 1,950. I think there's a data error."
• "I'm not disputing the process. I just want to understand how this number was reached."

Lines that don't work, and can hurt you:

• "My neighbors pay less than I do." (Neighbor comparisons are almost never admissible. Your neighbors may have exemptions, prior-year caps, or different base years.)
• "I could never sell this house for that much." (Without data, that's just an opinion. Bring actual sales.)
• "This is a money grab by the county." (True or not, it alienates the one person who could get you an informal correction.)
• Threatening a lawyer before you've gathered a single fact.

The first call should end with a request in for your property record card, your appeal deadline confirmed, the name of an informal review contact if one exists, and a clear read on what evidence the office will actually consider.

What is an informal review and is it worth requesting one?

An informal review (sometimes called a "walk-in review," "taxpayer conference," or "assessor meeting") is a low-stakes conversation where you present your case to a staff appraiser before you commit to a formal hearing.

Not every state or county offers one. Where they exist, they're worth it. You get to test your argument, learn what the assessor already knows about your property, and sometimes get a fix on the spot. In most jurisdictions there's no formal record that can be used against you later.

On the call, ask: *"Is there an informal review process before I file a formal appeal? Who would I meet with, and how do I schedule it?"*

If yes, take it. Bring your property record card with errors marked, your comparable sales printed, and photos of any deferred maintenance or condition issues the appraiser never saw. Be brief. Appraisers respect people who get to the point.

One warning. Requesting an informal review does NOT extend your formal appeal deadline in most states. File the formal appeal, or at least have it ready to file, before the deadline, even with an informal review on the calendar. Confirm this explicitly on your call.

What is the appeal deadline and how do you confirm it?

Getting this one wrong is the most dangerous mistake you can make. Appeal deadlines are hard stops. Miss one and you typically wait a full assessment cycle, often a year, before you can challenge the value again.

Deadlines swing wildly by state and often by county. The table below shows common filing windows drawn from publicly posted assessor rules and state statutes.

State	Typical Appeal Deadline	Filing Window After Notice
Illinois	Board of Review (varies by county, often Sept-Oct)	30 days from notice mailing [5]
California	September 15 or November 30 depending on county	Varies [6]
Texas	May 15 or 30 days after notice, whichever is later	30 days from notice [7]
New York (NYC)	March 1 (tentative roll)	Set by Tax Commission schedule [8]
Georgia	45 days from date of notice	45 days [9]
Minnesota	April 30 (Tax Court) or local board hearing	Varies [10]

Never trust the phone alone. After the call, verify the deadline yourself on your county or state government site. For example, gwinnett county tax assessor posts appeal windows right on the parcel search portal, and so does the bexar county tax assessor site in Texas.

Texas Tax Code Section 41.44 puts it plainly: "a property owner is entitled to protest...if the property owner files a written notice of protest...not later than the later of: (1) May 15; or (2) the 30th day after the date that notice was delivered to the property owner" ^[7]. That's the statute. Your state has one like it. Find it.

What happens if the assessor's office won't help or gives you the runaround?

Some offices are excellent. Some are understaffed, disorganized, or just slow. If you're stuck, here's a practical escalation path.

First, ask for a supervisor or a staff appraiser instead of the front-line administrative person. Frame it politely: "I've been having trouble getting some basic information about my parcel. Is there someone else I could speak with?"

Second, submit a written public records request for your property record card and the comparable sales used in your assessment. Do it by email so you keep a paper trail. Most states have public records response windows of 5 to 10 business days for standard requests.

Third, file your formal appeal before the deadline no matter what you've collected. You can keep gathering after you file. Missing the deadline because the assessor's office dragged its feet buys you no extension in most states.

Fourth, call your state's department of revenue or property tax division. Many run taxpayer assistance lines built for assessment questions. The Minnesota Department of Revenue keeps a property tax division with public guidance ^[10]. California's State Board of Equalization publishes detailed taxpayer rights guides for assessment appeals ^[6].

If you're in a large county and want to see how a formal appeal unfolds at scale, montgomery county property tax and hennepin county property tax both publish detailed appeal procedures that show what a well-run process looks like.

Should you mention that you're planning to appeal during the first call?

Yes. You don't have to be aggressive about it. Being clear that you'll appeal if the value isn't corrected signals you're serious and you've done the work. It also helps staff route you to the right resources.

Try: "I'd like to resolve this informally first, but I'm prepared to file a formal appeal if I need to. I want to make sure I understand all my options and deadlines."

That framing does several jobs at once. It signals preparation without hostility. It keeps the informal pathway open. And it tells the office you won't just swallow the number and walk away.

Don't bluff, though. If you say you'll file, file. The office has met plenty of homeowners who threaten an appeal and never follow through. If you're serious, back it with action.

What should you do immediately after the call?

Write everything down while it's fresh. A plain notes document is fine. Record:

• The date and time of the call
• The name and extension of whoever you spoke with
• Every fact they gave you, including the appeal deadline and any informal review deadline
• What they said they'd send you or make available
• Your next steps

If they promised to email your property record card, follow up within 48 hours if it hasn't landed. People get busy. A short follow-up email keeps things moving.

Now build your evidence file. Pull your property record card, gather comparable sales from the same window the assessor used, photograph any condition issues, and pull permits to confirm what was or wasn't built. If you want a structured process for organizing all of it, TaxFightBack's DIY appeal kit walks you through it step by step so you keep 100% of any reduction you win.

For county-specific research on how assessments get calculated locally, santa clara property tax and st louis county personal property tax use distinct methods worth knowing if you're in those jurisdictions.

How often do homeowners actually win after calling the assessor's office?

The honest answer: data on informal review outcomes is thin. Most counties don't publish how many values change through pre-appeal conversations versus formal hearings.

What we do know is that formal appeals pay off for prepared homeowners. A 2020 study from the University of Chicago's Harris School of Public Policy found that in Cook County, Illinois, properties that appealed received an average assessed-value reduction of roughly 12% ^[11]. The uncomfortable catch: over-assessed homes in lower-income areas appealed at far lower rates, so the people hit hardest by over-assessment often skip the process entirely.

Nationally, the International Association of Assessing Officers sets accuracy standards calling for a median assessment ratio between 0.90 and 1.10 relative to market value, meaning properties should sit at 90% to 110% of actual market value ^[4]. When your assessment lands outside that band, you've got a real statistical argument.

The pattern holds: homeowners who call, get their data, spot errors or comp discrepancies, and follow through with either an informal correction or a formal appeal do better than those who just pay the bill. The first call starts that process. It's no long shot.

Frequently asked questions

What is the first thing I should ask when I call the assessor's office?

Ask for your property record card and the comparable sales used to set your assessed value. Those two documents are the foundation of any challenge. Then confirm your exact appeal filing deadline. Many offices will also tell you whether an informal review is available before you have to file a formal appeal.

Can I lower my assessment just by calling, without filing a formal appeal?

Sometimes, yes. Many counties run an informal review where a staff appraiser looks at your concern before a formal hearing. If your record card has a factual error, like wrong square footage, it can often be corrected administratively. The informal route only works with clear, specific evidence. Always file the formal appeal before your deadline as a backstop.

What if I don't have my parcel number before I call?

Most county assessor websites let you look up your parcel by address. Search "[your county] parcel search" or "[your county] property lookup." Your tax bill and assessment notice both carry the number too. Without it, the call runs longer since staff have to search by name and address, but it's still doable.

Is it bad to tell the assessor's office I think my assessment is wrong?

No. That's exactly what the process exists for. Be specific instead of just venting. "I found three comparable sales that closed 15% below mine" is far more useful than "the value is too high." Staff respond to data, not emotion, and specificity signals you've done your homework.

What is a property record card and where do I get it?

A property record card is the assessor's internal description of your property: square footage, bedrooms, bathrooms, year built, condition grade, and any improvements. Request it by phone or download it from your county's parcel search portal. It's a public record in nearly every state. Errors like wrong square footage or a non-existent improvement are among the easiest grounds for a correction.

What happens if I miss the appeal deadline?

In most states, a missed deadline means you lose the right to challenge that year's value. There's usually no grace period. You wait for the next assessment cycle. A few states allow late appeals for narrow reasons, like a clerical error by the assessor, but don't count on it. Confirm your deadline on the call, then verify it on the county or state website.

Do I need a lawyer or an appraiser to call the assessor's office?

No. Any property owner can call directly. You don't need representation for an informal review or even most formal appeal hearings at the county board level. A lawyer or contingency firm only makes sense for high-value properties or complex commercial cases. For a standard residential appeal, your own research and a clear presentation of comparable sales usually does it.

Will calling the assessor's office trigger a re-inspection that makes my assessment higher?

This fear is common and rarely how it works. Calling for information or an informal review does not automatically trigger a physical re-inspection. If the assessor does request to inspect your property during the review, you can decline in most states, though declining may limit your grounds. Ask specifically whether an inspection would be required before you agree to one.

What comparable sales are most useful to bring up on the call?

Sales of similar homes within roughly a quarter to half mile of yours, closing within the same window the assessor used (often 12 to 24 months before the valuation date), with similar square footage, age, and condition. Arm's-length sales only, so no foreclosures, estate sales, or sales between relatives. Three to five strong comps beat a long list of weak ones.

Can I ask the assessor's office to explain how my neighborhood's values were set?

Yes, and it's a smart question. Assessors use mass appraisal, applying statistical models across whole neighborhoods rather than appraising each house alone. Ask what sales were used in your neighborhood group, what adjustment factors were applied, and whether your property sits in the correct cluster. Finding you're grouped with a higher-value neighborhood is legitimate grounds for appeal.

What is the difference between an informal review and a formal appeal hearing?

An informal review is a conversation with assessor staff, usually before your deadline, where you present concerns and they can correct records administratively. No official record, no ruling. A formal appeal goes before a board (like a Board of Review or Assessment Appeals Board), creates an official record, and ends in a binding decision you can push to Tax Court. Start informal if it's offered, but file the formal appeal before your deadline regardless.

How long does it take to get a response after calling the assessor's office?

Basic information like your deadline and record card usually gets handled on the call itself. An informal review meeting typically takes one to four weeks depending on volume. Formal appeal hearings run three to twelve months from the filing date. High-volume counties like Cook County, Illinois, have historically taken over a year to schedule hearings.

What if the assessor's office tells me I have no grounds to appeal?

They don't get to decide that before hearing your evidence. Every property owner has a legal right to appeal within the statutory deadline. If a staff member discourages you, politely say you'd still like the filing instructions. The right to appeal is written into state statutes in every state. No staff member can waive it for you.

Sources

1. Lincoln Institute of Land Policy, Property Tax Assessment: Understanding the Issues: Informal review processes resolve a substantial share of assessment disputes before formal hearings; comparable-sales challenges are the most common and successful form of appeal evidence.
2. California State Board of Equalization, Publication 29: California Property Tax: An Overview: Under Proposition 13, California assessed values increase no more than 2% per year until a change in ownership or new construction; Illinois residential property is assessed at 33.3% of market value; BOE publishes taxpayer rights guidance on assessment appeals.
3. Urban Institute, Improving Property Tax Equity: Data quality issues in assessor records contribute to systematic over-assessment, particularly in lower-income neighborhoods.
4. International Association of Assessing Officers (IAAO), Standard on Ratio Studies: IAAO assessment accuracy standards call for a median assessment ratio of between 0.90 and 1.10 relative to market value; mass appraisal applies statistical models across property groups rather than individual appraisals.
5. Illinois Property Tax Code (35 ILCS 200/), Board of Review filing procedures: Illinois counties use Board of Review appeal windows; filing windows are often 30 days from notice mailing, varying by county.
6. California State Board of Equalization, Assessment Appeals: California assessment appeal deadlines are September 15 or November 30 depending on the county's assessment roll filing date.
7. Texas Tax Code Section 41.44, Notice of Protest: Texas Tax Code Section 41.44 provides: 'a property owner is entitled to protest...if the property owner files a written notice of protest...not later than the later of: (1) May 15; or (2) the 30th day after the date that notice was delivered to the property owner.'
8. New York City Tax Commission, Assessment Appeal Filing: New York City assessment appeals for most property classes are due by March 1 of the tax year, tied to the tentative assessment roll.
9. Georgia Department of Revenue, Property Tax Appeal Process: Georgia property owners have 45 days from the date of the assessment notice to file a written appeal.
10. Minnesota Department of Revenue, Property Tax Division: Minnesota provides a Tax Court appeal pathway with an April 30 deadline and local board-of-appeal hearings; the department operates a public taxpayer assistance function for assessment questions.
11. University of Chicago Harris School of Public Policy, The Regressive Effects of Property Tax Appeals (2020): In Cook County, Illinois, properties that filed appeals received an average assessed value reduction of approximately 12%; lower-income neighborhoods appealed at disproportionately lower rates despite higher rates of over-assessment.