Median estimated market value for properties in this county.
AssessorSearch county dataCook County, IL
Cook County, IL assessor property search and records
Use this county guide to find official assessor property search resources, recorder and deed links, tax records, GIS parcel maps, permits, and property data insights for Cook County, Illinois. Search an address or APN, then jump to official county sources or property tax and value data.
Search a Cook County address or APN
Official sources
Cook County assessor, recorder, tax, and parcel map sources
Use this table to find the official county source for assessor property search, recorded documents, property tax, GIS parcel maps, permits, and zoning records.
| Record type | Official source | Notes |
|---|---|---|
| Assessed values | Cook County Assessor Property Searchwww.cookcountyassessoril.gov/address-search |
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| Deeds and recorded documents | Cook County Clerk Recording Searchwww.cookcountyclerkil.gov/recordings/search-recordings |
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| Property taxes | Cook County Treasurer Property Tax Portalwww.cookcountytreasurer.com |
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| GIS and parcel maps | CookViewer Parcel Mapmaps.cookcountyil.gov/cookviewer/ |
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| Permits and building records | Cook County Building Permit Statusbzpermits.cookcountyil.gov/permit-status/ |
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| Zoning and land use | Cook County Zoning Classification Searchsecure.cookcountyil.gov/BZ/zoning_info |
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County data
Cook County tax rates and property values
County and city-level rollups from AssessorSearch indexed property data. Use these values as directional context, then verify parcel-specific details with the official county sources above.
Median assessed value from county assessment records when available.
AssessorSearch county dataMedian annual property tax amount from indexed tax records when available.
AssessorSearch county dataMedian effective property tax rate calculated from annual tax and value fields.
AssessorSearch county dataCity property data
Top city rollups for estimated value, assessed value, property tax rate, and tax amount.
| City | Median estimated value | Median assessed value | Median effective property tax rate | Median tax amount |
|---|---|---|---|---|
| Chicago | $340,669 | $26,000 | 1.27% | $4,009 |
| Arlington Heights | $492,365 | $41,638 | 1.69% | $8,406 |
| Des Plaines | $367,256 | $31,001 | 1.62% | $5,852 |
| Schaumburg | $381,363 | $32,492 | 1.70% | $6,074 |
| Palatine | $402,497 | $34,000 | 1.78% | $7,105 |
| Orland Park | $425,569 | $34,000 | 1.77% | $7,508 |
| Evanston | $511,777 | $43,231 | 1.55% | $7,956 |
| Oak Lawn | $307,360 | $22,000 | 1.91% | $5,409 |
| Skokie | $449,138 | $34,000 | 1.61% | $6,994 |
| Tinley Park | $337,087 | $26,000 | 2.02% | $6,853 |
FAQ
Cook County property records FAQ
Common questions about assessor, deed, tax, GIS, and permit records.
Where can I search Cook County property records by address?
Use the official Cook County Assessor Property Search to search Cook County property records by address or parcel number. Use AssessorSearch property search as a free, easy-to-use option to search Cook County by address or APN.
How do I find the owners of Cook County properties?
Use the official Cook County Assessor Property Search for county ownership and parcel records when owner names are available online. Use AssessorSearch property search as a free, easy-to-use option to look up Cook County properties by address or APN.
Where can I verify assessed value in Cook County?
Use the official Cook County Assessor Property Search for assessed values, parcel details, exemptions, and property characteristics when those records are available online.
Where can I look up Cook County property tax bills or payments?
Use the official Cook County Treasurer Property Tax Portal for property tax bills, payment history, due dates, or tax collector records.
Where can I find deeds or recorded documents in Cook County?
Use the official Cook County Clerk Recording Search for deeds, mortgages, liens, plats, and other recorded documents. These records are usually separate from assessor property-value records.
Where can I view parcel maps or GIS data in Cook County?
Use the official CookViewer Parcel Map for parcel maps, map layers, boundaries, and GIS context. GIS maps should be treated as reference tools, not legal surveys.
Where can I search permits or zoning in Cook County?
Use Cook County Building Permit Status for permits and Cook County Zoning Classification Search for zoning or land-use records. City properties may require city-specific permit or planning portals.
Can I build a list of Cook County property owners?
Use Affix by AssessorSearch for county property owner lists, filters, exports, skip tracing, and outreach workflows.
Related counties
More Illinois property records
Use related county pages when researching nearby property records or comparing official source patterns.