Cook County Assessor Property Search 2026: PIN & Address

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Cook County, Illinois • PIN, assessment, tax and map help

Find the Correct Cook County Property Record

Search Cook County property records free through the official Assessor using a PIN or address, then use CookViewer when you need a parcel map, comparable-property research or a visual way to identify the correct parcel.

This 2026 guide also explains owner-name limitations, assessed and market values, township appeal deadlines, SmartFile evidence, exemptions, tax bills, Certificates of Error, Board of Review appeals and recorded deeds.

Start Property Search Find or Use a PIN Check 2026 Appeal Dates
Main Assessor finder PIN or Address Advanced filters are available, but there is no standard general owner-name property field.
2026 reassessment South & West Suburbs Cook County follows a three-year township reassessment cycle.
Appeal deadline Township Specific Never assume one countywide Cook County appeal date.
2025 tax first installment Due April 1, 2026 The Treasurer had not yet published the second-installment due date when this guide was verified.

Quick Answer: Which Cook County Property Website Do You Need?

Use the Cook County Assessor when you need assessed value, estimated market value, property characteristics, exemption history, assessment appeals or a property search by PIN/address. Use CookViewer for parcel mapping and comparable-property research. Use the Treasurer for tax bills, payments, refunds and tax history. Use the Clerk’s Recordings Division for deeds and recorded ownership documents. Use the Board of Review for the independent second level of assessment appeal.

Important owner-search correction: Cook County Assessor’s current property finder does not provide a normal public “search all properties by owner name” box. If you only know a person’s name, do not invent an address or PIN. Use recorded-document research or obtain a known property address first.
Independent guide: AssessorPropertySearch.org is not the Cook County Assessor, Treasurer, Clerk or Board of Review and does not collect Cook County property taxes.

Cook County Assessor, Treasurer, CookViewer, Clerk or Board of Review?

Many unsuccessful property searches happen because the visitor is using the right property but the wrong government system.

A

Cook County Assessor

Use for assessed value, estimated market value, property characteristics, exemptions, reassessment notices, appeals and Certificate of Error assessment issues.

$

Cook County Treasurer

Use for tax bills, payment status, refunds, delinquency, payment history, mortgage monitoring and mailing-address updates.

M

CookViewer

Use for parcel maps, PIN/address identification, nearby properties, aerial imagery, district information and comparable-property research.

D

Clerk Recordings

Use when you need the recorded deed, mortgage, lien, release or another legal land-record instrument.

BR

Board of Review

Use for Cook County’s independent second-level assessment appeal after the Assessor’s township assessment process.

P

Property Tax Portal

Use the countywide property-information ecosystem to move between connected assessment, tax and map resources when you are unsure which office owns the next task.

How to Search Cook County Property Records

Use this sequence for a free official Cook County assessor property search by address or PIN.

Choose PIN or address search

Use the Cook County Assessor’s Address Search if you know the property location. If you already have the 14-digit Property Index Number, use the PIN search for the cleanest match.

Keep the address simple

Enter the house number, choose the direction when needed, and type only the street name. Do not add “Street,” “Avenue,” “Road,” “Lane” or similar designations to the street-name field.

Select the correct property

Compare the PIN, property location, township and available property characteristics. Condominium and high-rise addresses can contain multiple separate parcels.

Open the full property details

Review estimated market value, assessed value, land/building values, characteristics, exemption history, permit information and appeal history when available.

Save the 14-digit PIN

The PIN is the key identifier for tax bills, appeals, exemptions, CookViewer, comparable research and recorded-property follow-up.

Move to the office that controls your next task

Use the Treasurer for tax payment, the Assessor for assessment issues, CookViewer for mapping, the Clerk for recorded deeds and the Board of Review for its separate appeal process.

Official Cook County Assessor Open Official Address Search

Cook County Assessor Property Search Map: CookViewer

CookViewer is the most useful companion to the Assessor search when you need a visual parcel lookup, nearby-property context or comparable-property research.

CookViewer search accepts

  • 10-digit PIN.
  • 14-digit PIN.
  • 14-digit PIN with dashes.
  • Property address.
  • Street intersection.
  • Direct parcel selection on the map.

High-rise parcel handling

If a map click selects several stacked parcels, such as condominium units in a high-rise, CookViewer displays multiple matching parcels so you can choose the correct one.

What CookViewer can help you review

Map information
How it helps
Current assessed values
Quick parcel-level assessment context.
Historical assessed values
Review how assessment data changed over time.
Estimated building information
Compare size, age, construction and other available characteristics.
Imagery
Review available aerial, oblique or historical image context.
District information
Identify commissioner, school, library, park and other districts associated with the parcel.
Related county resources
Move to property records, tax information and other connected datasets.

Use Compare Properties for appeal research

CookViewer’s comparison workflow can start from the subject parcel’s township, neighborhood and property class, then let you adjust property size, characteristics and search radius. If no useful comparable properties appear, expand the radius gradually or broaden the characteristics instead of choosing unrelated low-assessment properties.

GIS is not a survey: parcel graphics are excellent for research but should not decide a fence, encroachment, easement, setback or legal boundary dispute.
Official Cook County GIS Open CookViewer

How to Read a Cook County Assessor Property Record

Check the year and property class before comparing values. “Estimated market value,” “assessed value” and “tax bill” are not the same number.

Record field
What it means
Important check
PIN
Cook County parcel identifier.
Verify all digits before paying or filing.
Property location
Location used to identify the parcel.
It is not necessarily a legal or taxpayer mailing address.
Estimated market value
Assessor estimate of property market value.
It is not automatically the sale price.
Assessed value
Tax-assessment value before later parts of the tax calculation.
Class 2 residential property is generally assessed at 10% of estimated market value; commercial classes can use different assessment levels.
Land / building assessment
Allocation between land and improvements.
Useful for spotting where a change occurred.
Property class
Cook County classification tied to property use/type.
Compare properties in appropriately similar classes.
Characteristics
Available building/property facts used in assessment research.
Wrong square footage, structure type or condition can matter in an appeal.
Exemption history/status
Exemptions reflected on the account.
Missing exemptions can require an application or Certificate of Error.
Appeal history
Prior Assessor appeal information when available.
Past reductions do not create one permanent countywide value forever.
Permits / divisions / consolidations
Property changes that can affect parcel structure or assessment.
A significant change may trigger reassessment even outside the normal triennial year.
Found a factual characteristic error? The Assessor provides a property-characteristics correction route. A correction request is different from filing a valuation appeal, and corrections may not automatically change assessed value.
Review Property-Characteristic Corrections

Cook County 2026 Reassessment and Appeal Deadlines

Cook County uses a triennial reassessment cycle and township-specific appeal windows. There is no single “Cook County 2026 appeal deadline.”

2026 cycle: south and west suburban Cook County townships are in their scheduled reassessment year. North suburban and City of Chicago townships are not scheduled for full reassessment in 2026, although property-specific changes and annual appeal opportunities can still occur.

Current deadline examples — verified August 11, 2026

Township
2026 notice / status
Assessor last file date
Stickney
Reassessment notice June 29
August 12, 2026
West Chicago
Notice July 10
August 21, 2026
Lyons
Reassessment notice July 23
September 3, 2026
Northfield
Notice July 24
September 4, 2026
Cicero
Closed
July 31, 2026
Berwyn
Closed
July 6, 2026
Oak Park
Closed
June 18, 2026
Townships without a posted date
Calendar still developing
Do not guess; check live calendar.
Do not copy another township’s deadline. Bremen, Lemont, Worth, Calumet, Proviso, Orland, Thornton, Rich, Bloom and other townships may receive dates later in the 2026 cycle.

The Assessor says online updated values can take an additional business day to appear after a reassessment mail date or certification date.

Official live 2026 calendar Check My Township Deadline

How to File a Cook County Assessor Appeal in 2026

The Assessor’s Office uses SmartFile for online appeals. Do not begin an appeal before confirming that your township is open.

Check the township calendar first

Confirm the township is open and write down the official closing date. Starting a filing before the township opens can create problems with the submission.

Review the property details before claiming an error

Confirm PIN, characteristics, class, land/building data, estimated market value and any obvious factual problems.

Choose the actual appeal reason

Typical residential arguments include lack of uniformity, overvaluation, recent purchase evidence or a factual/property-characteristic issue.

Build supporting evidence

Use credible comparable properties, relevant sales, photographs, appraisals, purchase documents or factual records that directly support the requested change.

Submit one complete appeal by the township deadline

The 2026 rules treat the township closing date as the evidence deadline. Do not assume you will automatically receive extra time to upload missing documents.

Save the Filing ID, Docket Number and confirmation

Keep the emailed filing information and copies of every document submitted so you can verify the case and follow the result.

Duplicate-appeal warning: the 2026 Assessor rules state that the first appeal filed for a PIN controls. Do not ignore duplicate-filing warnings and submit competing versions casually.
Official Cook County Assessor
Open Online Appeal Instructions Residential Appeal Help

2026 Cook County Assessor Appeal Evidence Rules

Current rules are more useful than generic advice because they explain exactly what can cause an otherwise reasonable appeal to be weak or incomplete.

2026 rule
What the property owner should do
Evidence by township closing date
Submit the appeal and supporting evidence by the official closing date rather than planning on a later supplement.
Redact sensitive personal information
Remove Social Security, federal tax ID, driver-license, financial-account and payment-card numbers from evidence unless lawfully required.
Recent purchase/sale disclosure
When the property was purchased or sold within two years of the January 1 lien date, disclose the transaction and provide relevant documents.
Comparable-property minimum
Provide at least 3 appropriate comparable properties; the Assessor recommends at least 5.
Comparable quality
Use properties similar in size, class, characteristics and location. Avoid cherry-picking only unusually low assessments.
Comparable PINs
Provide the PIN for every comparable property used.
Photograph requirement
Current Assessor rules generally require qualifying appeal filers to submit recent property photographs; an individual taxpayer appealing their own residence has a specific exception described in the rule.
Appraisal evidence
Use a credible appraisal with relevant current data; stale or seriously noncompliant appraisal evidence may be rejected as unreliable.
Demolition claim
Prepare demolition permit/payment evidence, affidavit/date information and before/during/after photographs when required.
Incorrect property characteristics
Identify incorrect facts clearly in the appeal and request the property-data correction rather than relying only on a value argument.

A stronger comparable-property package

  • Subject-property PIN and address.
  • Current assessed and estimated market value.
  • Specific value requested.
  • At least 3 credible comparables; preferably 5 when available.
  • PIN for each comparable.
  • Property class, size, age, construction and neighborhood differences.
  • Relevant sale information for sales-comparison arguments.
  • Required photographs and any factual-error documents.
  • Short explanation of why each comparable is actually similar.
Do not file a homestead exemption through the SmartFile assessment-appeal process. The current rules direct exemption applications through the Assessor’s exemption system.
Read 2026 Official Appeal Rules

Cook County Board of Review: Second-Level Assessment Appeal

The Board of Review is separate from the Assessor. Its 2026 appeal season opened July 27, and the Board states there is no filing fee.

Independent review

The Board is not bound by the Assessor’s decision. You can still pursue a Board appeal even if the Assessor granted some reduction.

Township filing period

Each township opens for a defined Board filing window. You can pre-register when available before your township formally opens.

Current year only

The Board’s jurisdiction is limited to the current assessment year; it is not the route for retroactively reopening every prior year.

Assessor vs Board representation rule

Issue
Assessor
Board of Review
Individual owner
Can self-file.
Can generally represent themselves when property is titled in their individual name.
LLC / corporation
Current Assessor rules do not require attorney representation merely because the owner is a business organization.
Properties held by corporations, LLCs and similar entities must be represented by an attorney under Board rules.
Hearing
Follow Assessor filing process.
A hearing can be requested, but the Board explains that a hearing is not mandatory for every residential appeal.

Board uniformity evidence

The Board recommends roughly 3 to 5 similar properties for a lack-of-uniformity case. Prefer properties in the same neighborhood with similar class, size, age, construction, materials and condition. A front photograph of the subject property is required under the Board’s guidance, and comparable photographs are helpful.

Free filing: you do not need to pay a private company merely to submit a Board of Review assessment appeal.
Official Cook County Board of Review Check Board Appeal Status / File

Cook County Property Tax Exemptions to Check in 2026

The 2026 exemption application cycle relates to exemptions that appear on the later tax bill. Applications received after May 15, 2026 are handled through the Certificate of Error process under the Assessor’s current guidance.

Exemption
Current key rule
Renewal / benefit note
Homeowner
Generally for an eligible owner-occupied principal residence.
Automatically renews after approval while qualification continues; reduces EAV rather than directly subtracting the same dollar amount from the bill.
Senior
Generally age 65+ and eligible principal-residence owner/occupant.
Automatically renews after approval; current Assessor guidance shows an $8,000 EAV reduction.
Low-Income Senior Freeze
Current posted cycle uses a $65,000 household-income limit for the stated income year.
Must be applied for annually. It freezes eligible EAV, not the total property-tax bill.
Persons with Disabilities
Available to qualifying disabled homeowners.
Current Assessor guidance indicates a $2,000 EAV reduction and automatic renewal under current law.
Home Improvement
For qualifying owner-occupied Class 2 residential improvements.
Can exempt up to $75,000 in added value for up to four years; the Assessor says a separate application is generally not required.
Senior Freeze does not freeze the tax bill. It freezes qualifying equalized assessed value. Tax rates and other tax-system factors can still change the final bill.

Check the property’s Exemption History and Status section before applying again. Homeowner and Senior exemptions generally auto-renew after approval; the Senior Freeze does not.

Official Cook County Assessor exemption center Check or Apply for Exemptions

Missing Exemption or Prior-Year Error? Check Certificate of Error

A Certificate of Error can correct certain problems after an assessment or tax bill has already been finalized.

Missing exemptions

Eligible homeowners can use the Certificate of Error process to recover qualifying exemptions that were missing from prior bills within the years currently allowed by the Assessor.

Assessment valuation correction

A separate Certificate of Error process exists for qualifying assessed-valuation corrections after a tax bill has been issued.

Current processing warning: the Assessor is posting a notice about delays for valuation-related Certificates of Error and does not provide a reliable universal completion date. Do not promise a refund date based on when an application was filed.

If a valuation Certificate of Error is already approved and you are waiting for a refund, the Assessor directs taxpayers to the Treasurer for refund timing.

Review Certificate of Error Options

Cook County Property Tax Bill, Payment and 2026 Due Dates

The Treasurer—not the Assessor—collects Cook County property taxes.

Verified August 11, 2026: the Treasurer lists April 1, 2026 as the Tax Year 2025 First Installment due date. Its current due-date page does not yet list the Tax Year 2025 Second Installment due date, so check the Treasurer before relying on an old August/December date from another tax year.

Why the first installment looks different

The 2025 First Installment payable in 2026 is based on 55% of the prior year’s total tax. Exemptions and later assessment/tax calculations are reflected through the later billing process, which is why the first installment alone is not a final comparison of the new assessment year.

What Your Property Tax Overview can help with

  • Download or review a tax bill.
  • Check payment status.
  • Review available refunds.
  • See tax-bill history.
  • Check exemption-related information.
  • Update owner name or mailing information through the Treasurer’s process.
  • Review taxing-district information associated with the property.

Payment methods and fees

Payment method
Current rule
Online bank account
The Treasurer says checking/savings ACH payment has no fee.
Credit/debit card
Current Treasurer payment information lists a third-party processing fee; verify the amount displayed before paying.
Chase Bank
Current-year payments can be accepted at participating Illinois Chase locations when the required bill/payment information is presented.
Community bank
Participating community banks can accept qualifying payments when you meet the bank/account requirements.
Mail / Treasurer office
Follow the exact amount and postmark/payment instructions on the Treasurer’s current page.
Authorized payment warning: the Treasurer states that its own online payment system is the online system authorized and accepted by the office. Verify the domain before entering bank or card information.
Official Cook County Treasurer
Open Your Property Tax Overview Check Current Due Dates

Assessment Year vs Tax-Bill Year in Cook County

Illinois property-tax timing can make a correct record look wrong when you compare different years.

2026 assessment activity

South and west suburban properties are being reassessed in the scheduled 2026 triennial cycle.

2026 payments

Payments made in 2026 can relate to Tax Year 2025, so the payment year and assessment year are not interchangeable.

2026 reassessment tax effect

A 2026 reassessment generally affects Tax Year 2026 bills issued in the later billing cycle rather than instantly changing an earlier 2025-tax-year installment.

Before comparing: write down the assessment year, tax year, installment number and pay year for each number you are reviewing.

Cook County Deed and Recorded Property Search

The former Cook County Recorder of Deeds office no longer exists as a separate office. Its recording duties were assumed by the Cook County Clerk in December 2020.

Use Assessor/CookViewer first

If you know only the property address, identify the correct parcel and save the PIN before moving into recorded-document research.

Use Clerk Recordings for documents

Recorded deeds, mortgages, liens, releases and other instruments belong to the Clerk’s recording system rather than the Assessor assessment database.

Address-to-deed workflow

  1. Find the property by address in the Assessor or CookViewer.
  2. Save the full 14-digit PIN and property location.
  3. Note the current public owner/taxpayer information only as a research clue.
  4. Move to Cook County Clerk recording resources.
  5. Verify the actual recorded instrument before making a legal ownership conclusion.
Do not use the Assessor owner display as a title opinion. Legal ownership, lien priority, easements and title defects require the recorded documents and, when necessary, qualified title/legal help.

CookViewer currently lists the Clerk’s Recordings Division at 118 N. Clark Street, Room 120, Chicago, with phone 312-603-5050.

Official Cook County recording route Open Cook County Recording Information

Cook County Property Search Problems and Fixes

Problem
Likely reason
Best next step
Address returns no result
Street-name formatting is too detailed.
Remove St., Ave., Rd., Ln. and similar designations and use the separate direction field.
Condo address shows several results
Multiple unit or parking parcels are stacked at one address.
Compare unit/PIN information and use CookViewer’s parcel result list.
Owner-name search is missing
Current Assessor finder is not a general owner-name property database.
Search a known address/PIN or use Clerk recording research when you only know the owner name.
PIN search fails
Wrong number length, typo or a different parcel identifier.
Recover the PIN from address search, CookViewer or the tax bill.
Assessed value looks wrong
Wrong year, factual error, reassessment or valuation dispute.
Review property characteristics and township appeal deadline before filing.
Building facts are wrong
Property characteristics need correction.
Use the Assessor property-characteristics correction route and save supporting evidence.
Homestead exemption is missing
Never applied, eligibility/update issue or missing prior-year exemption.
Check exemption history and use the current exemption or Certificate of Error process.
Tax payment is missing
Processing issue, wrong PIN or payment problem.
Use Treasurer payment status and keep the confirmation/account information.
Second installment date is unclear
Current 2025-tax-year second-installment date has not yet been posted on the Treasurer due-date page.
Check the official due-date page rather than assuming last year’s date.
Map boundary conflicts with fence
GIS is not a survey.
Use recorded plats/deeds and a professional survey for legal boundary work.

Cook County Property Offices and Call Scripts

Office
Use it for
Current contact
Cook County Assessor
Assessments, characteristics, exemptions, Assessor appeals and Certificates of Error.
118 N. Clark St., 3rd Floor, Room 320, Chicago, IL 60602
312-443-7550
Cook County Treasurer
Bills, payments, refunds, payment history and delinquency.
118 N. Clark St., Room 112, Chicago, IL 60602
312-443-5100
Board of Review
Independent second-level property-assessment appeal.
118 N. Clark St., Chicago, IL 60602
312-603-5542
Public hours currently listed: Mon–Fri, 9 a.m.–5 p.m.
Clerk Recordings Division
Deeds and recorded real-estate documents.
118 N. Clark St., Room 120, Chicago, IL 60602
312-603-5050
Clerk Maps
Cook County map-related Clerk questions.
118 N. Clark St., Room 434, Chicago, IL 60602
312-603-5640

Assessor call script

“I am calling about PIN [14 digits] in [township]. The 2026 property record shows [specific fact/value]. I need help with [characteristic correction / exemption / appeal / Certificate of Error].”

Treasurer call script

“I am calling about PIN [14 digits] for Tax Year [year], installment [1 or 2]. I need to verify the [bill / payment / refund / delinquent balance] status.”

Board call script

“I am in [township] and want to confirm whether the 2026 Board of Review filing period is open or available for pre-registration for PIN [number].”

Before You Pay, Appeal or Rely on the Record

  • Confirm all 14 PIN digits.
  • Confirm the property address and unit.
  • Identify the correct township.
  • Check the assessment year.
  • Check the tax year and installment separately.
  • Review property characteristics before arguing value.
  • Check exemption history.
  • Confirm the township appeal closing date.
  • Use appropriate comparable properties rather than cherry-picking.
  • Save appeal/payment confirmations.
  • Use recorded deeds for legal ownership research.
  • Do not use GIS parcel lines as a survey.

Cook County Assessor Property Search FAQs

Is the Cook County Assessor property search free?

Yes. Cook County provides official public property lookup tools without requiring you to buy a private property report. Use the Assessor for assessment records and CookViewer for map-based parcel research.

How do I search Cook County property records by address?

Use the Cook County Assessor Address Search. Enter the house number, choose the direction when applicable and type only the street name in the street-name field without designations such as Street, Avenue, Road or Lane.

How do I search Cook County property by PIN?

Use the property’s 14-digit Property Index Number for the cleanest match. CookViewer also accepts the first 10 digits, the full 14 digits or a dashed 14-digit PIN. Always verify the complete PIN before making a tax payment.

Can I search the Cook County Assessor by owner name?

The current Assessor property finder does not provide a normal general owner-name property search field. If you know the address, search by address. If you know only a person or company name and need ownership history, use Cook County Clerk recording resources and verify the recorded deed.

Where can I see a Cook County parcel map?

Use CookViewer, the official Cook County GIS property application. It accepts PINs, addresses and street intersections and lets you select parcels directly from the map.

What is the Cook County property assessment appeal deadline in 2026?

There is no single countywide deadline. Each township has its own Assessor filing window. Check the live 2026 Assessment and Appeal Calendar before filing because some townships are already closed while others have later dates.

How many comparable properties should I use in a Cook County Assessor appeal?

The 2026 Assessor rules require at least three comparable properties for a comparable-based appeal and recommend at least five. Comparables should be genuinely similar in size, class, characteristics and location, and each comparable PIN should be included.

Where do I pay Cook County property taxes?

Use the Cook County Treasurer, not the Assessor. The Treasurer’s official site provides tax bills, payment status and payment methods. Bank-account ACH payment is currently offered without a fee.

What if my Homeowner or Senior exemption is missing?

Check the Assessor property details and Exemption History first. Current 2026 guidance says applications received after May 15 are processed through the Certificate of Error process, which can also provide a route for qualifying missing prior-year exemptions.

Is CookViewer or the Assessor parcel line a legal survey?

No. CookViewer and Assessor parcel information are public research tools. Use recorded documents and a professional survey when a fence, easement, encroachment or legal boundary must be established.

Finish Your Cook County Property Search Safely

Start with the Assessor when you need assessment information, save the full PIN, and use CookViewer when a map or comparable-property search will help. Move to the Treasurer only for tax-bill/payment work, the Clerk for recorded ownership documents and the Board of Review for its separate appeal process.

For any 2026 appeal, verify your township’s live deadline before preparing the filing. For any tax payment, verify all 14 PIN digits and the tax year before submitting money.

Property Search Smart Helper

Find the Right Property Record, Tax Bill, Deed or Assessor Search Route

Use this helper before searching county property records. It helps you choose the right office, prepare the right details, avoid wrong-office mistakes, and review property records safely.

Official-source focused Use county assessor, appraiser, auditor, tax collector, treasurer, recorder, clerk, GIS and appeal resources where available.
Not legal or tax advice Always confirm values, taxes, deeds, exemptions, appeals and deadlines with the official county office.
Works across states Designed for APN, PIN, parcel number, STRAP, folio, account number, GIS map and deed-record searches.

Property Search Route Finder

Choose what you have and what you want to find. The tool will suggest the best search route and common mistake to avoid.

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Parcel / APN / PIN Format Helper

Parcel numbers are formatted differently by county. Try these variations if your official search does not return results.

This tool does not send or store your entry. It only creates search-format ideas on this page.
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Assessor, Tax Collector, Recorder or GIS?

Select your issue and this tool will show the office that usually handles it.

Choose an option above
This finder helps prevent wrong-office mistakes. Exact office names vary by state and county.

Simple Property Tax Estimate Helper

This is a general estimate only. State and county tax rules differ, so always verify final bills with the official tax collector, treasurer or county tax office.

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Exemption / Appeal Readiness Checklist

Use this before applying for an exemption or challenging a value. Missing proof is one of the biggest reasons users waste time or miss deadlines.

Property Record Review Checklist

Review these fields before relying on any assessor, appraiser, auditor, property appraiser, tax or deed record.

Official-source and accuracy note: This helper is for educational use only. Property values, tax bills, deeds, exemptions, GIS boundaries and appeal deadlines can change. Always confirm final information with the official county assessor/appraiser/auditor, tax collector/treasurer, recorder/clerk, GIS office or appeal board.