How to request your assessor's internal notes on your property

Last updated 2026-07-11

What internal records does an assessor actually keep on your property?

Every assessor's office keeps a property record card (sometimes called a property data sheet, field card, or parcel record) for every parcel in the jurisdiction. That card is the backbone of your assessment. It records the square footage the assessor measured or estimated, the number of bedrooms and bathrooms, the year built, the construction quality grade, any outbuildings, and the date of the last physical inspection.

Beyond the card, most offices keep valuation worksheets showing how they applied their cost or income model to reach the assessed value. In jurisdictions that use mass appraisal software (the most common approach in the U.S.), those worksheets include the land value, the depreciation percentage applied, and the replacement cost figure. Some offices keep a separate adjustment sheet showing which comparable sales they picked and how they adjusted for differences.

Field inspection notes are the ones most homeowners don't know exist. When an assessor or data collector visited your property, they may have written or typed notes about condition, recent renovations, or unusual features. Those notes feed the quality or condition grade on your record card, which drives your value. A note that says "kitchen updated, granite counters, high-end appliances" can add tens of thousands of dollars to your assessed value. You have every right to see it.

Many offices also keep appeal history files, prior-year assessment records, and any correspondence the previous owner had with the office. All of it is fair game under most state public records laws. ^[1]

Are assessor's internal notes public records you're legally entitled to see?

In most states, yes. Property assessment records are listed as public records under state open-records statutes. The federal Freedom of Information Act (FOIA) ^[2] doesn't reach local assessors, but every state has its own version. California has the California Public Records Act ^[3]. Texas has the Texas Public Information Act ^[4]. Illinois has the Illinois Freedom of Information Act ^[5]. Most of these statutes treat property records as presumptively open.

The International Association of Assessing Officers (IAAO), the professional body that sets assessment standards, publishes guidance stating that assessment records should be available for public inspection as part of standard assessment administration. ^[1] That's the professional norm, and most assessors follow it.

There are narrow exceptions. Some states exempt appraisal reports prepared for pending litigation. A few offices argue that internal work-product notes are deliberative and protected until the assessment is final. Those arguments have mixed success in court. The property record card itself, the valuation worksheet, and any data the office actually used to set your value are nearly always disclosable.

Here's the practical point. Don't let a clerk tell you "we don't release internal documents." Ask them to cite the specific statutory exemption they're relying on. Most of the time they can't, and the records appear.

How do you actually request these records, step by step?

Start online. Most county assessors post your basic property record card on a public portal. Search your county assessor's website for your parcel number or address. Cook County, Los Angeles County, and many others let you download the property data sheet directly. See the [cook county tax assessor tax bill guide for a walkthrough of that portal.] ^[11]

If the portal doesn't show everything, here's the sequence that works.

1. Call the assessor's office and ask for the "property record card" and "valuation worksheet" for your parcel. Use those exact terms. Many clerks will email them to you on the spot with no formal request.

2. If the clerk hesitates, submit a written public records request. Your state's open-records statute usually specifies the form. In Texas, you email or fax it to the governmental body's public information officer. ^[4] In California, you write to the agency head. ^[3] Most states do not require a special form. A plain email identifying the records you want is enough.

3. In the request, ask specifically for: the property record card or parcel data sheet, the appraisal or valuation worksheet for the current and prior tax year, any field inspection notes or data collector notes for the parcel, the list of comparable sales used in your neighborhood's mass appraisal, and any adjustment factors or grade/condition codes and their definitions.

4. Deadlines vary. Texas requires a response within 10 business days. ^[4] California gives agencies 10 days with a 14-day extension available. ^[3] Illinois requires 5 business days for non-commercial requesters. ^[5]

5. Copy fees typically run $0.10 to $0.25 per page, and electronic records are usually free. If the office quotes a large fee, ask for records in electronic format first.

One thing that actually speeds this up: go in person. Bring a thumb drive. Many offices will let you copy digital files on the spot, and you skip the mail cycle entirely.

What do the field inspection notes and property record card actually tell you?

The property record card is where most winning appeals start. Read it line by line against what you know about your home.

Square footage errors are the most common and most valuable mistake to catch. Assessors often rely on permit records or old measurements that don't match the actual finished area. If your card says 2,200 square feet but your home is really 1,950, that gap likely inflates your assessed value by 10 to 15% before you've done anything else.

The quality or condition grade is the next place to look. Assessors use coded scales, often alphabetical (A through F) or numerical (1 through 6). A grade of "C" in many systems means "average," which sounds right, but the definition varies by office. Get the grade definitions. If your assessor graded your 1965 ranch the same quality as a 2015 new-build down the street, that's an argument.

Field inspection notes sometimes reveal the assessor never actually entered your home. A note that says "exterior inspection only" or "no access," paired with interior characteristics that don't match reality, is powerful appeal evidence. Some offices do mass appraisal entirely from aerial photography and permit data, and their notes will show that.

Comparable sales worksheets tell you which sales the assessor used to calibrate your neighborhood's values. If the comps are larger, newer, or on better lots than yours, documenting those differences is the core of a sales-comparison appeal. For large jurisdictions like Los Angeles or Montgomery County, the neighborhood clusters used in mass appraisal can lump dissimilar properties together. See [la county property tax and montgomery county property tax for jurisdiction-specific details.] ^[7]

What if the assessor refuses to provide the records or says they don't exist?

A refusal requires a written explanation under most state statutes. If you get a verbal "we don't do that," ask for the denial in writing with the specific legal exemption cited. That request alone sometimes reverses the refusal.

If you receive a written denial, your state's open-records law spells out an appeals process. In Texas, you can seek an opinion from the Attorney General's office, which is free and often resolves disputes within 45 business days. ^[4] In California, you can sue in Superior Court or file a complaint through the state's public records channels. ^[3] Most states have a similar administrative appeal before you'd need to go to court.

If the office says the records "don't exist," take that seriously but not at face value. Ask them to confirm in writing that no field inspection notes, data collector worksheets, or valuation models exist for your parcel. Some offices genuinely do minimal documentation, especially in rural counties. Others are hoping you'll give up. The written confirmation matters, because if records surface later at an appeal hearing, the prior denial becomes its own issue.

One workaround: request the records of a few neighboring parcels instead. Their property record cards show you the grade definitions, the comparable sales used in your neighborhood, and the format of whatever documentation the office keeps. That tells you exactly what to ask for when you request your own records again.

How should you use the records you get to build an appeal?

Match every field on the property record card against the actual facts of your property. Make a two-column list: what the assessor recorded versus what's true. Photograph the evidence for any discrepancy. Wrong square footage? Get a floor plan or hire a licensed appraiser to measure (or measure yourself, carefully, using the ANSI Z765 standard that most assessors follow). Wrong bedroom count? Photographs. Wrong condition grade? Photographs showing deferred maintenance, functional obsolescence, or damage the assessor didn't see or didn't weigh right.

If the valuation worksheet uses the cost approach, check the depreciation percentage. Assessors sometimes apply too little depreciation to older homes, especially if the home hasn't been updated. A 50-year-old house with original mechanicals should show much higher depreciation than the assessor's table may allow.

If you find comparable sales on the assessor's worksheet, pull those same sales from public records and compare them to your property. If the assessor made no adjustment for an arm's-length sale versus a distress sale, or failed to adjust for lot size differences, that's an argument for your hearing.

TaxFightBack's DIY appeal kit includes a property record card audit checklist and a comparable sales adjustment grid that walks through this process field by field. It saves time if you're doing this for the first time.

Bring printed copies of both the original assessor record and your corrected version to the hearing. Present the discrepancy as a simple factual correction, not an argument. Assessors and boards of equalization respond far better to "your record shows 2,200 square feet and I measured 1,950" than to "you overassessed me." The first is a verifiable fact. The second is a conclusion.

Does requesting these records tip off the assessor that you're planning to appeal?

Probably yes, and that's fine. Requesting public records is legal, and assessors get these requests constantly from attorneys, appraisers, and homeowners. No penalty. No downside.

Some homeowners worry that requesting their records will trigger a reassessment upward. That's a common fear and generally unfounded. Assessors don't have the time or the incentive to single out requesters for punitive reassessment, and doing so would create obvious legal exposure. The current year's assessment is already set. They can't change it mid-cycle because you asked questions.

If anything, requesting records before an appeal tells the assessor's staff you've done your homework. In some jurisdictions, a well-documented factual discrepancy discovered early leads to an informal settlement before the formal hearing, which is faster and easier for everyone.

Large urban counties handle thousands of appeals per cycle. See the [gwinnett county tax assessor and bexar county tax assessor guides for examples of high-volume appeal offices.] Your records request is routine.

Are there fees for requesting assessor records and how long does it take?

Copy fees for paper records typically run $0.10 to $0.25 per page under most state statutes, and many states cap total fees for small requests. Electronic records, which is what you want, are almost always free or cost only minimal staff time.

Response times vary by state.

State	Response deadline	Extension allowed
California	10 days	+14 days, must notify [3]
Texas	10 business days	+10 business days, must notify [4]
Illinois	5 business days (non-commercial)	+5 business days [5]
Florida	"promptly" (no fixed deadline)	Reasonable time
New York	5 business days for acknowledgment, 20 for records	Yes, with notice
Georgia	3 business days	+7 business days

For most property record cards, the real-world wait is shorter than the statutory maximum. A phone call or counter visit typically produces the record card the same day or within a few days. Save the formal written request for when the informal approach fails or when you need the full file including notes and worksheets.

Budget one to two weeks from request to receipt if you use the written route. Time that against your appeal deadline, which in most states runs 30 to 90 days from the date of your assessment notice. ^[8] Request the records the same week you get your notice.

What specific language should you use in a public records request?

Keep the request short, specific, and formal. Here's language that works in most states.

"Pursuant to [your state's open-records statute, e.g., the Texas Public Information Act, Tex. Gov't Code § 552 et seq.], I request copies of the following records for the property at [full address], Parcel ID [number]: (1) the current and prior-year property record card or parcel data sheet; (2) all valuation worksheets, cost schedules, or income/expense analyses used to establish the assessed value for the current tax year; (3) all field inspection notes, data collector notes, or condition/grade assignment records associated with this parcel; (4) the neighborhood comparable sales list or market adjustment table used for the neighborhood or cluster in which this parcel is classified; (5) definitions for all grade or condition codes appearing on this parcel's record. I request records in electronic format to minimize cost. If any portion of this request is denied, please provide a written explanation citing the specific statutory exemption." ^[2]

Substitute your state's statute name and code citation. For Texas requests, address it to the Chief Appraiser of your county appraisal district, not the tax assessor-collector (those are separate offices in Texas). ^[4] For California, address it to the County Assessor. For Illinois, address it to the FOIA officer of the township assessor or county assessor, depending on which office assessed your property. ^[5]

Email is fine for most jurisdictions. Keep a copy of the email and any attachments. If you mail it, use certified mail.

How do these records differ from what's already available on public portals?

Public portals typically show a summary version of the property record card: basic characteristics, assessed value, and sometimes recent sales. What they usually leave out is the detail that matters most for appeals.

Valuation worksheets showing the cost breakdown, depreciation rates, and land-to-improvement ratios rarely appear on public portals. Field inspection notes almost never do. The neighborhood comparable-sales adjustment grid that calibrates your entire market area is almost never posted publicly. The internal grade and condition definitions that explain what "C+" actually means for your assessor's office are rarely published.

Some large counties are exceptions. The Hennepin County Assessor in Minnesota posts relatively detailed sales ratio data and neighborhood adjustment information. See [hennepin county property tax.] ^[12] The NYC Finance Department publishes income capitalization worksheets for income-producing properties. See [nyc property tax.] But even in those jurisdictions, the parcel-specific inspection notes require a direct request.

The gap between what's on the portal and what sits in the file is exactly where your appeal opening lives. A portal that shows "assessed value: $480,000" tells you nothing about whether the square footage is right, what comparable sales drove that value, or whether the condition grade matches reality. The internal file tells you all of that. ^[9]

What records matter most for commercial property appeals?

Commercial assessments add a layer: the income approach. For any property the assessor valued using actual or market-rate income, request the income and expense worksheet showing the effective gross income assumed, the vacancy rate applied, the expense ratio, and the capitalization rate used.

Those four figures are the entire assessment for most apartment buildings, retail strips, and office properties. A cap rate that's one percentage point too low inflates the assessed value by roughly 10 to 15% on its own. An assumed vacancy rate of 5% versus your actual 15% is a large factual discrepancy. Both are correctable with documentation.

For commercial properties, also request the lease abstracts or rent surveys the assessor used if they performed an income analysis. In many states, the assessor may use market rent rather than actual rent, but they have to document their market rent estimate somewhere. That documentation is a public record. See the [santa clara property tax guide for how California county assessors handle commercial income approaches.] ^[10]

The IAAO Standard on Mass Appraisal of Real Property states that all data used in the valuation process should be documented and retained as a matter of professional standards. ^[1] That's your best argument when a commercial assessor's office claims the income analysis worksheets don't exist or aren't releasable.

Frequently asked questions

Can I request the assessor's notes before my appeal deadline even if I haven't filed the appeal yet?

Yes, and you should. Public records requests are independent of the appeal process. File your appeal and your records request at the same time, or request records first. In most states you have only 30 to 90 days from the assessment notice to file an appeal, so don't wait for records to arrive before filing. You can supplement your appeal with the records once you receive them.

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

A property record card is the assessor's master data file for your parcel. It records square footage, bedroom and bathroom count, year built, construction grade, condition rating, and land characteristics. Many counties post it on their public portal; search by address or parcel number. If it's not online, call the assessor's office and ask for it by name. Most offices will email it without requiring a formal request.

What if the assessor's records show information I never gave them? Can they enter my home without permission?

Assessors generally cannot enter your home without permission. Many conduct exterior-only inspections or use aerial imagery and permit data. If your record card shows interior details from a period you don't remember, check whether a prior owner permitted an inspection. You're entitled to know the date and type of the last inspection; ask for that in your records request. Disputed interior data is a strong factual argument in an appeal.

How much does a public records request for assessor records cost?

Usually very little. Electronic records are free or nearly free in most states. Paper copies typically run $0.10 to $0.25 per page. A property record card and valuation worksheet together are rarely more than 20 pages, so total cost is usually under $5. If an office quotes you a large fee for a simple request, ask specifically for electronic copies first.

What if the assessor's field notes mention renovations I made? Does that automatically raise my assessment?

Not automatically. The assessor can use renovation information in future assessments, but the current year's assessment is typically set as of a specific lien date. If the notes reference work done after the lien date, argue that the improvement should not affect the current year. If the notes overstate the renovation (for example, describing a basic kitchen refresh as a luxury remodel), document what you actually did and the actual cost to correct the record.

Can I request assessor records for neighboring properties to use as comparables?

Yes. Property record cards for all parcels are public records. Requesting nearby records is standard practice for building a comparable-sales argument. Pull cards for three to five properties that sold recently and are similar to yours. Compare their recorded characteristics to yours. If the assessor's cards show your neighbors' homes with lower quality grades or smaller square footage on similar properties, that supports your appeal.

Do I need a lawyer or FOIA specialist to request assessor records?

No. Public records requests for property assessment documents are straightforward. You need your parcel number, your state's open-records statute name, and the specific list of records you want. A plain email citing the statute and listing the records is legally sufficient in most states. A lawyer adds nothing here unless the office formally denies your request and you need to file an administrative appeal or court challenge.

How long does the assessor have to respond to my records request?

Deadlines vary. California and Texas give 10 business days with an extension option. Illinois gives 5 business days for residential requesters. Georgia gives 3 business days. Florida has no fixed deadline but requires a prompt response. If the deadline passes without a response or a written extension notice, follow up in writing and reference the deadline. Most assessors comply once you cite the statute.

What is a valuation worksheet and what does it show?

A valuation worksheet is the assessor's calculation of how they reached your assessed value. Under the cost approach it shows land value, replacement cost per square foot, total replacement cost, depreciation percentage, and final depreciated value. Under the sales comparison approach it shows the comparable sales used, their sale prices, and adjustments made. Under the income approach it shows assumed rent, vacancy, expenses, and cap rate. Any of those figures can be wrong.

If I find errors in my property record card, can the assessor fix them and raise my value instead of lowering it?

In theory yes, though it's rare in practice and varies by state. Some states allow reassessment upward after a review if errors are found. Others protect you from upward corrections during an appeal. Before submitting corrections, check your state's rules. As a practical matter, most errors favor the assessor (overstated size or quality), not the homeowner. If you find an error that would raise your value, you have no obligation to disclose it during your appeal.

What if the assessor claims the valuation worksheets are exempt from disclosure as deliberative process or work product?

Push back. The deliberative process exemption under state law typically protects pre-decisional policy discussions, not factual data used to calculate a specific value. Assessment worksheets are factual records, not policy deliberations. Ask the office to cite the specific statutory exemption language. In most states, courts have held that assessment records used to set a final value are not protected. A letter citing your state's open-records statute and requesting the specific exemption language usually resolves this.

Can I use the assessor's own comparable sales list against them in an appeal?

Yes, and it's one of the most effective strategies. If the assessor's comparable sales worksheet shows homes that are larger, newer, or in better condition than yours with no adjustments for those differences, point that out directly. The assessor's own data supporting a lower value is stronger than third-party comparables you found yourself, because it eliminates the argument that you cherry-picked favorable sales.

Are assessor records requests different for commercial properties than residential?

The public records law is the same, but the records you need differ. For commercial properties, request the income and expense worksheet, the market rent survey used, the vacancy and cap rate assumptions, and any income approach documentation. In some states, actual lease data submitted confidentially is exempt, but the assessor's market-rate assumptions are public. The income approach figures are where most commercial appeals are won or lost.

What happens to the records I request after my appeal is decided?

Keep them. Assessment records stay useful for at least two future cycles. If you win an appeal this year, having the corrected record on file lets you verify next year's assessment matches the corrected data. If you lose, the records still document the assessor's methodology, which may change or may support a stronger appeal next cycle when comparable sales have shifted.

Sources

1. International Association of Assessing Officers (IAAO), Standards and professional guidance: Assessment records should be available for public inspection, and all data used in the valuation process should be documented and retained, as a matter of professional assessment standards.
2. U.S. Department of Justice, Office of Information Policy (Freedom of Information Act): The federal Freedom of Information Act applies to federal agencies; state and local open-records laws govern local assessor records.
3. California Legislative Information, California Public Records Act, Gov. Code § 7920 et seq.: California agencies must respond within 10 days and may extend up to 14 additional days with written notice; property records are presumptively open.
4. Texas Attorney General, Open Government / Texas Public Information Act, Tex. Gov't Code § 552: Texas governmental bodies must respond within 10 business days; the Attorney General's office provides free opinions on disputed records requests.
5. Illinois Attorney General, Freedom of Information Act, 5 ILCS 140: Illinois public bodies must respond within 5 business days for non-commercial requesters, with a 5-business-day extension available.
6. International Association of Assessing Officers (IAAO), Standard on Mass Appraisal of Real Property: All data used in the valuation process should be documented and retained as a matter of professional assessment standards.
7. Los Angeles County Assessor, Assessment Appeals Information: Mass appraisal in large jurisdictions groups properties into neighborhood clusters for valuation, which can result in dissimilar properties receiving similar adjustments.
8. Lincoln Institute of Land Policy, Property tax administration research: Most state appeal deadlines run 30 to 90 days from the date of the assessment notice, varying by jurisdiction.
9. National Taxpayers Union Foundation, Property tax assessment research: Public portals typically show summary assessment data; detailed valuation worksheets and field inspection notes require a direct records request.
10. Santa Clara County Assessor, Assessment appeals and property valuation: California county assessors use the income approach for commercial properties and document assumed market rent, vacancy rates, and capitalization rates in valuation worksheets.
11. Cook County Assessor's Office, Property records search: Cook County provides property data sheets including characteristics and assessment history through its public online portal.
12. Hennepin County, Property and taxes information: Hennepin County posts sales ratio data and neighborhood adjustment information publicly, making it one of the more transparent large-county assessment offices.