Property Tax Radar

County Report · Tax Year 2025

Cook County, IL

Of 1,260,666 residential parcels on the CCAO rolls this year, 278,960 appear overassessed relative to comparable neighbors. 22,557 of those are also supported by recent purchase price evidence — the strongest argument at a Board of Review hearing.

In Illinois, the Cook County Assessor is required to assess residential properties at 10% of fair cash value. If your home's assessed value per square foot is higher than comparable properties in your neighborhood, you're paying more than your fair share and have the right to appeal to the Board of Review.

Parcels assessed 1,260,666

Flagged as overassessed 278,960

Median overassessment $45,751

Total flagged value $21927M

With sale evidence 22,557

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2025 Board of Review Appeal Windows Are Open

Appeal windows vary by township, March–November 2025. Find your township's open window at cookcountyassessor.com. Not sure when your township's window opens? Ownwell monitors your property year-round and files automatically — no upfront cost, you only pay if you save.

Browse by Zip Code Sorted by Flagged Count · 174 Zips

Zip Flagged Avg Over Flag Rate

60617 6,972 $40,158

31.4%

60453 5,660 $43,186

32.6%

60619 5,354 $43,060

33.6%

60634 5,187 $57,874

27.1%

60620 5,168 $43,300

31.4%

60647 4,956 $166,690

37.5%

60004 4,939 $121,164

33.3%

60609 4,923 $68,942

43.5%

60402 4,640 $44,478

29.3%

60628 4,606 $37,972

35.8%

60056 4,565 $65,844

29.1%

60643 4,510 $51,562

32.7%

60411 4,456 $30,857

28.9%

60618 4,232 $118,394

32.1%

60632 4,230 $53,219

27.1%

60629 4,138 $40,476

24.6%

60804 3,941 $40,796

28.3%

60608 3,939 $136,778

40.2%

60462 3,911 $57,804

28.0%

60193 3,888 $64,688

25.9%

60641 3,829 $79,396

29.2%

60630 3,806 $69,706

27.8%

60623 3,683 $62,058

30.9%

60062 3,653 $163,133

26.3%

60426 3,589 $26,407

37.1%

60638 3,570 $46,890

20.8%

60622 3,290 $234,729

38.7%

60637 3,217 $170,924

54.3%

60477 3,094 $47,056

24.8%

60438 3,046 $32,366

29.9%

60707 3,044 $63,052

33.6%

60636 3,009 $41,315

33.4%

60625 2,991 $102,055

29.6%

60409 2,980 $28,977

27.7%

60473 2,799 $37,015

35.6%

60169 2,704 $50,752

27.5%

60007 2,703 $68,301

27.6%

60655 2,697 $47,016

27.1%

60419 2,526 $26,747

31.8%

60614 2,383 $502,972

40.4%

60430 2,276 $38,330

31.1%

60153 2,264 $45,873

37.6%

60439 2,253 $94,627

27.6%

60612 2,190 $110,559

48.7%

60090 2,173 $62,057

26.7%

60487 2,135 $58,204

36.0%

60008 2,134 $49,474

29.0%

60644 2,116 $62,172

32.8%

60005 2,009 $81,968

24.7%

60646 1,964 $72,161

29.6%

60478 1,920 $36,392

34.8%

60194 1,901 $59,383

31.0%

60639 1,895 $66,651

21.1%

60616 1,886 $143,606

32.5%

60429 1,880 $36,410

36.1%

60640 1,868 $169,291

36.4%

60154 1,840 $45,887

26.0%

60164 1,836 $50,099

33.3%

60467 1,831 $73,704

24.4%

60302 1,830 $113,249

25.5%

60803 1,803 $43,969

27.5%

60107 1,765 $47,713

22.2%

60649 1,752 $70,041

32.2%

60621 1,747 $53,624

31.1%

60016 1,676 $60,204

30.9%

60443 1,671 $41,413

27.7%

60053 1,625 $66,651

28.7%

60465 1,577 $57,086

30.9%

60406 1,554 $46,999

41.2%

60624 1,513 $64,927

28.7%

60130 1,507 $77,282

34.8%

60615 1,484 $271,684

41.6%

60104 1,482 $33,610

26.4%

60633 1,477 $33,275

36.5%

60131 1,447 $48,551

32.4%

60415 1,438 $44,174

36.5%

60827 1,437 $22,617

32.5%

60160 1,373 $59,725

29.7%

60077 1,368 $59,507

28.4%

60445 1,366 $33,662

27.6%

60466 1,365 $24,839

28.8%

60133 1,313 $53,047

26.5%

60201 1,311 $126,937

25.8%

60463 1,308 $55,619

27.7%

60660 1,294 $154,863

38.7%

60631 1,293 $77,548

30.3%

60026 1,262 $213,466

31.2%

60304 1,258 $71,434

25.7%

60642 1,202 $236,606

35.0%

60103 1,162 $57,811

24.6%

60418 1,153 $33,989

25.8%

60471 1,148 $37,541

30.6%

60305 1,128 $121,759

28.4%

60659 1,105 $67,483

19.6%

60076 1,102 $73,244

26.2%

60805 1,091 $46,687

26.0%

60546 1,071 $51,035

29.4%

60610 1,038 $630,445

53.7%

60651 1,027 $64,222

48.7%

60422 1,022 $52,512

29.0%

60089 966 $51,423

19.8%

60025 958 $189,562

30.6%

60425 950 $30,792

29.7%

60656 934 $50,219

25.7%

60611 921 $482,238

383.8%

60464 918 $99,353

29.2%

60171 905 $107,357

34.6%

60428 902 $34,870

33.2%

60457 870 $47,104

26.0%

60070 803 $77,181

17.8%

60534 795 $41,721

33.6%

60482 755 $39,739

22.0%

60469 742 $39,738

39.3%

60475 726 $53,148

43.8%

60067 705 $81,178

22.6%

60155 688 $40,051

27.5%

60452 675 $44,807

25.9%

60162 670 $35,012

26.0%

60526 647 $65,168

25.7%

60173 635 $74,911

25.7%

60163 630 $39,786

36.4%

60613 563 $119,442

48.0%

60706 558 $49,861

29.3%

60472 538 $28,548

26.7%

60074 520 $54,836

30.4%

60455 488 $42,957

24.5%

60203 465 $88,082

29.5%

60461 435 $49,841

24.2%

60654 418 $163,546

120.8%

60093 405 $266,079

27.1%

60653 370 $139,080

37.6%

60476 364 $28,270

40.3%

60714 346 $48,998

28.9%

60018 346 $46,743

28.5%

60172 343 $63,316

24.0%

60176 310 $31,946

31.3%

60605 291 $142,754

41.8%

60513 265 $63,137

41.0%

60607 262 $279,269

70.1%

60068 259 $118,659

26.6%

60192 232 $67,102

27.1%

60165 227 $41,641

29.9%

60022 176 $386,683

26.9%

60202 145 $68,308

50.3%

60657 129 $125,613

47.8%

60480 118 $86,907

33.2%

60120 113 $231,296

47.3%

60195 63 $53,748

10.2%

60661 59 $221,792

92.2%

60301 51 $41,295

25.2%

60126 47 $48,725

35.1%

60558 46 $97,958

21.1%

60606 38 $63,844

60458 34 $48,795

12.1%

60527 28 $190,078

46.7%

60010 25 $153,242

21.7%

60645 24 $58,816

51.1%

60456 20 $36,998

60029 19 $337,458

11.0%

60712 16 $59,551

84.2%

60525 16 $53,813

9.9%

60652 15 $16,400

100.0%

60159 10 $45,675

18.9%

60091 10 $134,957

12.3%

60690 8 $301,300

60601 7 $8,116

60449 4 $87,284

60196 4 $42,938

7.3%

60658 2 $39,885

20.0%

60602 2 $18,055

60423 2 $389,446

60626 1 $18,870

60493 1 $102,120

60459 1 $59,586

9.1%