How to talk to your assessor before filing a formal appeal

Last updated 2026-07-10

Why talk to the assessor before filing anything?

The conversation before a formal appeal is where a lot of cases quietly get fixed. Assessors are not your enemy. They run offices that process tens of thousands of parcels, and errors slip through: wrong square footage, a finished basement the data calls unfinished, a pool that doesn't exist. Catch one of those, bring it to the right person, and you often skip the hearing entirely.

Most jurisdictions build an informal review step into the process. California county assessors publish instructions for requesting an informal review before a formal Assessment Appeals Board hearing ^[1]. Illinois lets taxpayers meet with the assessor's office during the published complaint period before any Board of Review filing ^[2]. Even where the step isn't required, assessors keep the discretion to correct clerical errors and revise values.

The practical case is simple. It's free. It's fast. It costs you nothing if it fails, because you still get to file formally. In some counties the informal step is required before the board will hear you. Skipping it leaves money on the table.

What is an informal review and how is it different from a formal appeal?

An informal review is a direct conversation with an appraiser or staff member in the assessor's office, by phone, in person, or sometimes by email. No hearing officer. No sworn testimony. No formal record. You show the staff what you think is wrong, they look at the data, and if they agree, they change it. If they don't, you file formally and nothing from the meeting hurts your case.

A formal appeal goes to an independent body: a Board of Review, an Assessment Appeals Board, or an equivalent tribunal depending on your state. It runs on a filed petition, hard deadlines, evidence submissions, and sometimes a hearing where you present on the record. Outcomes carry legal weight and can be appealed further to Tax Court.

The informal step has almost none of that friction. You're not arguing law. You're asking a staff appraiser to look at specific data with you. Keep the tone collaborative.

One thing to get straight: an informal review usually does not extend or pause your formal appeal deadline. If the county window closes June 15 and your informal meeting is June 12, file formally anyway as a precaution before the deadline passes ^[3]. Check your county's rules. Some counties let you withdraw a formal filing if the informal review works; others make you file before they'll even schedule the informal review.

How do you find out if your county offers an informal review?

Start with the assessment notice in your hand. Many notices carry a line like "before filing a formal appeal, you may request an informal review by contacting..." That sentence is your invitation and your clock, because informal reviews often close earlier than the formal deadline.

If the notice says nothing, go to your county assessor's website and hunt for pages labeled "appeals," "review," "dispute," or "protest." The Cook County Assessor publishes a guide to its appeal process that covers both the assessor-level review and the later Board of Review step ^[4]. Gwinnett County, Georgia runs an informal appeal period before the formal hearing process ^[5]. Montgomery County, Maryland offers informal review through the state assessment office before a formal Maryland Tax Court petition ^[6].

Can't find it online? Call the main assessor's number and ask plainly: "Does your office offer an informal review or pre-appeal meeting before I file a formal appeal?" Any experienced staffer answers that in ten seconds. Write down who you spoke with, the date, and what they said.

Large urban counties sometimes give the informal step a department name. In Los Angeles County, the Assessor runs an Assessment Information Center where taxpayers discuss valuations ^[7]. In Cook County, the assessor-level appeal happens before the Board of Review step. Different office, different deadline. Read carefully.

What should you prepare before the conversation?

You need three things: a clear statement of the value you think is correct, evidence to back that number, and documentation of any factual errors in the assessor's records.

Comparable sales are your strongest evidence. Pull 3 to 5 sales of similar homes in your neighborhood that closed within the 12 months before your assessment date. Closer to the date is better. Your county's own sales search tool works fine; so does Zillow's sold filter or Realtor.com. For each comp, write down the address, sale date, square footage, sale price, and price per square foot. Then calculate your home's implied value at the same rate. If the assessor has you at $180 per square foot and the comps average $145, you've got a concrete, defensible ask.

For factual errors, pull your property record card off the assessor's website. This card lists everything the data says about your home: year built, square footage, bathroom count, basement finish, garage type, condition grade. Check it against reality. Wrong square footage is one of the most common errors going. If the card says 2,100 square feet and your home is 1,850, that's a clean correction with a clear value impact.

Bring physical copies. A printout of each comp. Your property record card with errors circled. If you have a recent independent appraisal (many homeowners get one for a refinance), bring that too. Appraisals carry real weight with assessors because licensed appraisers complete them following USPAP standards ^[8].

Want a structured way to organize all this before the meeting or a formal filing? The TaxFightBack DIY appeal kit walks through comp selection and error documentation with a working spreadsheet.

What do you actually say when you get in the room or on the phone?

Lead with the specific error or the specific number. Not the frustration. Try this: "I'm calling about parcel 123-456-789 at 45 Maple Street. My assessment came in at $380,000, and I've pulled five comparable sales that average about $305,000. I'd like to walk through those with someone and see if there's a way to have this reviewed before I file formally."

That framing works. It signals you know the process, it anchors to a number, and it asks for help instead of picking a fight. Assessor staff hear angry homeowners all day. The caller with organized comps and a reasonable ask gets more attention than the one shouting "my taxes are too high."

If your issue is a record-card error, lead with that: "Your records show my home at 2,400 square feet, but the actual living area is 1,850. I have the original building permit and a floor plan measurement if that helps." Factual corrections are the easiest cases for staff to act on fast, because they don't require an opinion of value. They just require a data fix.

Ask questions the whole time. "What year's sales did you use to set the value?" "Does your record reflect the roof condition?" "Is the basement counted as finished square footage?" These questions show you how the assessor built the number and often surface issues you never spotted.

Close with a direct ask: "If the comps support a value closer to $310,000, is that something you can adjust at this level?" If yes, ask about the timeline and whether you'll get written confirmation. If no, ask whether a supervisor or senior appraiser should weigh in, and nail down the formal appeal deadline so you don't miss it.

What happens if the assessor agrees to reduce your assessment?

Get it in writing. Ask for a corrected assessment notice or a written confirmation of the new value. Some offices mail a letter; others just update the online record and call it done. Either way, confirm the change actually shows in the official record before any formal deadline passes.

If you filed a formal appeal as a precaution (smart move), ask how to withdraw it once the correction is confirmed. Most boards allow withdrawal. Some want a written withdrawal form. A few counties will process a correction mid-appeal and close the case administratively.

Check whether the corrected value touches prior tax years. In many states, assessors correct only the current year going forward. In others, a clerical error can be fixed retroactively, which can mean a refund of overpaid taxes. California Revenue and Taxation Code Section 4831.5 allows escape assessments to be canceled when they result from assessor error ^[9]. So ask directly: "Does this correction affect only the current assessment year, or prior years too?"

If the assessor drops the value but not as far as your evidence supports, chase the rest at the formal level. A partial reduction at the informal stage doesn't block you from appealing the remaining gap, as long as you've filed within the deadline.

What if the assessor says no or doesn't respond?

File the formal appeal. That's the whole answer. A "no" at the informal stage means nothing for your formal case. You haven't admitted anything, you haven't waived any rights, and the evidence you gathered is still yours to use at the hearing.

If the staff was unresponsive or the process felt murky, document that. Some boards ask whether you tried to resolve things informally, and a record of your attempts (calls with dates and names, emails with timestamps) shows good faith.

The no-response situation deserves its own plan. If you called and heard nothing, or emailed with no reply, follow up once in writing (email creates a record). Still silence after a week or two? Don't wait. File your formal appeal. You can always withdraw it if an informal resolution lands later.

Some perspective on how often the informal step delivers: the Cook County Assessor's office reports receiving over 300,000 appeals in a recent assessment cycle, and a large share get resolved at the assessor level before reaching the Board of Review ^[4]. Nobody has clean nationwide data on informal review success rates. The closest honest read comes from high-volume county reporting, which consistently shows meaningful percentages of values cut at the assessor level before any formal hearing.

Are there deadline traps you need to watch out for?

Yes, and this is where people get hurt. The informal review window and the formal appeal deadline are often different dates. Missing the formal deadline because you were waiting on an informal response is one of the most common and most painful mistakes in this whole process.

Here's a simplified view of how a few counties stack the timing:

County / State	Informal Review Window	Formal Appeal Deadline
Cook County, IL	During 30-day assessment publication	Board of Review: 30 days after township opens
Los Angeles County, CA	Before AAB filing	November 30 of assessment year (or Dec 31 in some years)
Montgomery County, MD	Before formal SDAT appeal	45 days from notice date [6]
Gwinnett County, GA	Informal appeal period follows notice	45 days from assessment notice [5]
New York City	Before Tax Commission filing	March 1 (tentative) / March 15 (owner-occupied) [10]

These dates move. Confirm current-year information directly with your county assessor or state department of revenue. The table shows the timing structure, not legal advice for any specific year.

The safe play: request the informal review the day your assessment notice lands, and file the formal appeal before the deadline no matter where the informal conversation stands. If the informal review works, withdraw the formal filing. If it doesn't, you're covered.

Does talking to the assessor hurt your chances at a formal hearing?

Generally, no. Nothing you say in an informal review is part of the formal record unless you put it in writing and submit it as part of a formal filing. You can float numbers, ask questions, even share evidence, without any of it being used against you at a board hearing.

There's one practical caution. If you share your comp analysis informally and the appraiser spots weaknesses (one comp was a distressed sale, another was a different property class), fix those weaknesses before you present the same evidence at a formal hearing. Treat the informal meeting as a dry run. You learn what the assessor thinks your gaps are, and you get time to close them.

You also don't have to lay out everything you plan to use at the hearing. Give enough to justify a reasonable reduction. Keep your strongest evidence fresh for the hearing if the informal step falls short.

Should you bring an attorney or tax agent to the informal meeting?

For most residential homeowners, no. The informal meeting is a short conversation about straightforward questions: are the square footage and property characteristics recorded correctly, and do comparable sales support the value? You don't need a lawyer for that.

Bringing an attorney tells the staff the case is headed toward litigation, which makes the conversation guarded and less useful. It also costs money you probably don't need to spend yet.

If your property is a commercial building, a multi-family complex, or a high-value home where the potential savings justify professional fees, a property tax agent who knows the local market and the assessor's internal procedures can add real value. But for a typical single-family home? Do it yourself.

That's the point of resources like the TaxFightBack appeal kit. With organized evidence and a clear ask, most homeowners handle both the informal conversation and a formal hearing without paying anyone a contingency fee.

What records should you keep after the conversation?

Keep everything. Build a simple paper or digital folder for each tax year and drop in the date of the conversation, who you spoke with, their direct phone or email, what you presented, what they said, and any reference numbers they gave you.

If the assessor promises to follow up by a certain date and doesn't, you have a record to escalate with. If you file formally and the board asks whether you tried informal resolution, you have proof. If a correction gets made and later reversed by mistake, you have evidence of the prior agreement.

For any informal review that changes your value, ask for written confirmation of the new number and the effective date. File it with your tax records for at least four years, which covers typical audit windows in most states.

Frequently asked questions

Can the assessor raise my value during an informal review?

Technically, yes. If you draw attention to your property and the assessor finds evidence of underassessment, some jurisdictions allow an upward correction. In practice it's rare at the informal stage, since the assessor already had the same data when they set the original value. Still, avoid volunteering information that wasn't on the record card, like an unpermitted addition, unless you're ready for that outcome.

Does requesting an informal review pause or extend my formal appeal deadline?

No, in almost every jurisdiction it does not. The formal appeal deadline runs on its own clock. If you're close to the deadline and the informal review hasn't resolved, file the formal appeal first. Withdraw it later if the informal step works. Missing the formal deadline because you waited on an informal response is a common and irreversible mistake.

How long does an informal review typically take?

It varies by county and time of year. Right after assessment notices go out, offices are flooded, and informal reviews can run two to four weeks. Earlier in the cycle, a phone call sometimes gets resolved the same week. Some counties schedule formal 15-to-30-minute appointments; others handle it by email review. Ask the office for an estimated turnaround when you first make contact.

What if my assessment is wrong because of a neighbor's sale that inflated the neighborhood?

This is a market-level argument, and it's harder to win at the informal stage than a specific factual error or a set of better-matched comps. You'd need to show that the sales used to assess your property aren't actually comparable to yours. Focus on pulling comps that match your property's size, age, condition, and location more precisely, and present those as the better measure of your value.

Can I bring a recent appraisal to the informal review?

Yes, and it's one of the strongest things you can bring. A licensed appraisal completed near the assessment date by a USPAP-compliant appraiser carries weight because it's an independent professional opinion of value using the same sales comparison method the assessor uses. If you had a refinance or purchase appraisal done within the relevant window, bring a copy.

What if my property has physical damage or condition issues the assessor didn't account for?

Document it with photos and, if you can, a contractor's written repair estimate. Foundation problems, roof damage, water intrusion, or deferred maintenance that hurts marketability are legitimate value-reducing factors. The assessor's mass appraisal model often assigns a default condition grade that ignores individual properties. Photos and a repair estimate turn a vague complaint into a concrete, verifiable claim.

Is the informal review confidential, or can what I say be used at a formal hearing?

Informal conversations are generally not part of the formal record. What you say out loud isn't transcribed or submitted as evidence. But anything you submit in writing, like an email with evidence attached, could be referenced later. Keep verbal discussions exploratory, and save your most polished written evidence package for the formal submission if you need one.

My county says I have to file the formal appeal before scheduling an informal review. Is that normal?

Yes, some counties require a formal filing to open the case before scheduling any review. Cook County's assessor-level appeal works this way: you submit the appeal online, then an assessor appraiser reviews it. That's still functionally the informal step; it just happens after a light formal filing. Follow your county's process exactly. The terminology differs but the substance is similar.

What comparables are most persuasive in an informal review conversation?

Sales within a half-mile of your property that closed within 12 months before the assessment date, with similar square footage (within 15 to 20 percent), similar age, similar condition, and the same property type (single-family versus condo). Arm's-length sales only: skip foreclosures, estate sales, and sales between relatives, which assessors will discount. A few well-matched comps beat a long list of loose ones.

What should I do if the assessor's office is unresponsive or hard to reach?

Send a short written request by email if possible, so you have a timestamped record. Try calling early on a weekday outside peak assessment season. If you genuinely can't get through before the formal deadline, file the formal appeal to preserve your rights and note in the filing that you attempted informal review. Don't let a hard-to-reach office cost you the formal deadline.

Can I do an informal review if I already filed a formal appeal?

In many counties, yes. Some boards encourage or require informal settlement talks before scheduling a hearing. Contact the assessor's office even after filing and ask whether you can resolve the case informally before your hearing date. Boards generally prefer cases settle at the assessor level because it clears their docket. Don't withdraw the formal appeal until the new value is confirmed in writing.

Do commercial property owners go through the same informal review process?

The informal review option usually exists for commercial properties too, but the conversations run deeper. Income-approach valuation, cap rates, and operating expense analysis replace the simple comparable-sales discussion. Commercial owners benefit more from professional help, at least for evidence preparation, even if the meeting itself is owner-led. The basic protocol (call early, bring specific evidence, make a concrete ask) still applies.

How do I find the right person to talk to at the assessor's office?

Ask for the appraiser assigned to your neighborhood or township, more than any available staffer. Front-desk staff take messages and share information, but the person who can actually adjust a value is the appraiser with jurisdiction over your parcel. Some counties list appraiser assignments by area on their websites. If not, ask the front desk: 'Who is the appraiser responsible for my area?' and request that person specifically.

Sources

1. California State Board of Equalization, Property Taxes section: California county assessors publish guidance for informal review before a formal Assessment Appeals Board hearing
2. Illinois Department of Revenue, Property Tax section: Illinois allows taxpayers to meet with the assessor's office during the complaint period before any Board of Review filing
3. Illinois Department of Revenue, Property Tax section: An informal review typically does not extend or pause the formal appeal deadline
4. Cook County Assessor's Office, Appeals Information: Cook County Assessor publishes a detailed guide describing both the assessor-level review and the subsequent Board of Review step; the office received over 300,000 appeals in a recent assessment cycle
5. Gwinnett County Board of Tax Assessors: Gwinnett County, Georgia runs an informal appeal period before the formal hearing process, with a 45-day window from the assessment notice
6. Maryland State Department of Assessments and Taxation: Montgomery County, Maryland offers informal review through the state assessment office before a formal Maryland Tax Court petition; formal deadline is 45 days from notice date
7. Los Angeles County Assessor, Assessment Information Center: Los Angeles County Assessor operates an Assessment Information Center where taxpayers can discuss valuations informally
8. The Appraisal Foundation, Uniform Standards of Professional Appraisal Practice (USPAP): Appraisals carry weight with assessors because they are completed by licensed appraisers following USPAP standards
9. California Revenue and Taxation Code Section 4831.5 (via California Legislative Information): California Revenue and Taxation Code Section 4831.5 allows escape assessments to be canceled when they result from assessor error, potentially allowing retroactive correction
10. New York City Tax Commission: NYC formal Tax Commission filing deadline is March 1 for most properties and March 15 for owner-occupied Class 1 properties
11. Montgomery County Maryland Department of Finance: Montgomery County Maryland operates an assessment review system with specific deadline windows