Property Tax Radar
60706

Cook County, IL · 2025

558 homes in this zip may be paying too much in property taxes — a collective ~$27.8M above the neighborhood median.

The typical flagged property is overassessed by ~$40,658. Overassessments range from ~$11,146 to ~$503,287. 175 properties have recent purchase price evidence — the strongest argument at a Board of Review hearing. Ownwell can file your appeal and handle everything — no upfront cost, you only pay if you save.

Appeal windows vary by township, March–November 2026. Find your township's open window at cookcountyassessor.com.

Flagged

558

properties

Median

$40,658

overassessment

Max

$503,287

overassessment

Sale evidence

175

properties

Flagged Properties Sorted by Overassessment · 558 Total
4421 N NAGLE AVE

HARWOOD HEIGHTS, IL

~$503,287 Read report →
7459 W WINNEMAC AVE

HARWOOD HEIGHTS, IL

~$265,000 Read report →
4432 N NATCHEZ AVE 2ND

HARWOOD HEIGHTS, IL

~$227,500 Read report →
4458 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$221,479 Read report →
6800 W GUNNISON ST

HARWOOD HEIGHTS, IL

~$142,728 Read report →
4334 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$135,050 Read report →
4344 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$129,923 Read report →
4439 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$128,696 Read report →
4372 N OAK PARK AVE

HARWOOD HEIGHTS, IL

~$128,006 Read report →
4517 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$122,258 Read report →
4722 N NARRAGANSETT AVE

HARWOOD HEIGHTS, IL

~$111,371 Read report →
5119 N OCTAVIA AVE

HARWOOD HEIGHTS, IL

~$110,000 Read report →
4449 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$110,000 Read report →
4716 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$107,025 Read report →
4705 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$101,532 Read report →
7525 W LAWRENCE AVE 401

HARWOOD HEIGHTS, IL

~$98,120 Read report →
4542 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$97,840 Read report →
4425 N NATCHEZ AVE

HARWOOD HEIGHTS, IL

~$97,159 Read report →
4257 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$94,083 Read report →
7421 W CARMEN AVE

HARWOOD HEIGHTS, IL

~$84,000 Read report →
4347 N OAK PARK AVE

HARWOOD HEIGHTS, IL

~$82,943 Read report →
7444 W WINNEMAC AVE

HARWOOD HEIGHTS, IL

~$81,010 Read report →
4521 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$79,178 Read report →
4833 N OLCOTT AVE 608

HARWOOD HEIGHTS, IL

~$78,830 Read report →
4222 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$78,505 Read report →
6721 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$75,443 Read report →
4213 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$74,862 Read report →
7529 W WINONA ST

HARWOOD HEIGHTS, IL

~$71,500 Read report →
4746 N NARRAGANSETT AVE

HARWOOD HEIGHTS, IL

~$71,381 Read report →
4519 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$70,070 Read report →
7502 W AINSLIE ST

HARWOOD HEIGHTS, IL

~$70,000 Read report →
4903 N OCONTO AVE

HARWOOD HEIGHTS, IL

~$70,000 Read report →
5050 N OCONTO AVE

HARWOOD HEIGHTS, IL

~$68,510 Read report →
6949 W LELAND AVE

HARWOOD HEIGHTS, IL

~$68,047 Read report →
6814 W GUNNISON ST

HARWOOD HEIGHTS, IL

~$66,994 Read report →
4455 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$66,645 Read report →
4224 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$66,315 Read report →
4220 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$66,315 Read report →
4628 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$66,160 Read report →
6846 W GUNNISON ST

HARWOOD HEIGHTS, IL

~$66,114 Read report →
4525 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$65,718 Read report →
7504 W AINSLIE ST

HARWOOD HEIGHTS, IL

~$65,000 Read report →
4528 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$64,533 Read report →
6905 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$64,422 Read report →
4256 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$63,984 Read report →
6939 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$62,848 Read report →
6951 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$61,360 Read report →
4439 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$60,614 Read report →
4235 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$60,070 Read report →
4449 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$60,000 Read report →
6907 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$60,000 Read report →
4415 N NEENAH AVE

HARWOOD HEIGHTS, IL

~$60,000 Read report →
4614 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$59,923 Read report →
4330 N OAK PARK AVE

HARWOOD HEIGHTS, IL

~$59,174 Read report →
4712 N NARRAGANSETT AVE

HARWOOD HEIGHTS, IL

~$57,751 Read report →
4424 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$57,500 Read report →
4447 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$57,489 Read report →
6550 W GUNNISON ST 301

HARWOOD HEIGHTS, IL

~$57,429 Read report →
4216 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$56,999 Read report →
4668 N NARRAGANSETT AVE

HARWOOD HEIGHTS, IL

~$56,878 Read report →
4645 N NAGLE AVE

HARWOOD HEIGHTS, IL

~$56,585 Read report →
4811 N OLCOTT AVE 407

HARWOOD HEIGHTS, IL

~$56,120 Read report →
6900 W MONTROSE AVE HSE

HARWOOD HEIGHTS, IL

~$55,986 Read report →
4516 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$55,005 Read report →
4520 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$55,005 Read report →
4435 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$54,365 Read report →
4451 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$54,293 Read report →
4229 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$54,127 Read report →
6920 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$52,803 Read report →
4811 N OLCOTT AVE 417

HARWOOD HEIGHTS, IL

~$52,580 Read report →
4364 N OAK PARK AVE

HARWOOD HEIGHTS, IL

~$52,362 Read report →
6670 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$51,360 Read report →
4419 N NASHVILLE AVE

HARWOOD HEIGHTS, IL

~$51,056 Read report →
4708 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$50,939 Read report →
4456 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$50,917 Read report →
6636 W GUNNISON ST

HARWOOD HEIGHTS, IL

~$50,162 Read report →
6949 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$50,010 Read report →
5027 N OCONTO AVE

HARWOOD HEIGHTS, IL

~$50,000 Read report →
7317 W LELAND AVE

HARWOOD HEIGHTS, IL

~$50,000 Read report →
4724 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$49,923 Read report →
4525 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$49,923 Read report →
4634 N NARRAGANSETT AVE

HARWOOD HEIGHTS, IL

~$49,343 Read report →
4729 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$49,200 Read report →
4737 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$49,200 Read report →
4744 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$49,200 Read report →
6550 W GUNNISON ST 402

HARWOOD HEIGHTS, IL

~$48,571 Read report →
6550 W GUNNISON ST 403

HARWOOD HEIGHTS, IL

~$48,571 Read report →
4525 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$48,474 Read report →
6945 W LELAND AVE

HARWOOD HEIGHTS, IL

~$48,341 Read report →
4745 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$48,331 Read report →
4721 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$48,331 Read report →
7528 W WINONA ST

HARWOOD HEIGHTS, IL

~$48,000 Read report →
4237 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$47,440 Read report →
4736 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$47,025 Read report →
4732 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$47,025 Read report →
4728 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$47,025 Read report →
4724 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$47,025 Read report →
4712 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$47,025 Read report →
4708 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$47,025 Read report →
4704 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$47,025 Read report →
4622 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$47,025 Read report →
4549 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$47,025 Read report →
4231 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$46,579 Read report →
6723 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$45,443 Read report →
4811 N OLCOTT AVE 416

HARWOOD HEIGHTS, IL

~$45,240 Read report →
4551 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$45,126 Read report →
7410 W LAWRENCE ST 218

HARWOOD HEIGHTS, IL

~$44,740 Read report →
4321 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$43,530 Read report →
6550 W GUNNISON ST 303

HARWOOD HEIGHTS, IL

~$43,371 Read report →
6550 W GUNNISON ST 404

HARWOOD HEIGHTS, IL

~$43,371 Read report →
4311 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$43,106 Read report →
7501 W ARGYLE ST

HARWOOD HEIGHTS, IL

~$43,010 Read report →
6726 W SENIOR PL

HARWOOD HEIGHTS, IL

~$42,968 Read report →
4724 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$42,398 Read report →
4720 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$42,398 Read report →
4701 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$42,388 Read report →
4713 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$42,388 Read report →
4717 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$42,388 Read report →
4744 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$42,388 Read report →
4736 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$42,388 Read report →
4732 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$42,388 Read report →
4728 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$42,388 Read report →
4518 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$42,250 Read report →
4312 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$42,250 Read report →
4451 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$42,076 Read report →
4335 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$41,800 Read report →
6732 W SENIOR PL

HARWOOD HEIGHTS, IL

~$41,778 Read report →
6415 W SUNNYSIDE AVE

HARWOOD HEIGHTS, IL

~$41,229 Read report →
4716 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$40,939 Read report →
4704 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$40,939 Read report →
4700 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$40,939 Read report →
4660 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$40,939 Read report →
4425 N NEENAH AVE

HARWOOD HEIGHTS, IL

~$40,520 Read report →
4327 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$40,496 Read report →
4632 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$40,346 Read report →
4604 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$40,070 Read report →
5114 N ODELL AVE

HARWOOD HEIGHTS, IL

~$40,000 Read report →
5027 N OCTAVIA AVE

HARWOOD HEIGHTS, IL

~$40,000 Read report →
4725 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$39,780 Read report →
4717 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$39,780 Read report →
6921 W LELAND AVE

HARWOOD HEIGHTS, IL

~$39,780 Read report →
6913 W LELAND AVE

HARWOOD HEIGHTS, IL

~$39,780 Read report →
6905 W LELAND AVE

HARWOOD HEIGHTS, IL

~$39,780 Read report →
6947 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$39,620 Read report →
6841 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$39,620 Read report →
4328 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$39,494 Read report →
6689 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$39,202 Read report →
4709 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$39,200 Read report →
4717 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$39,200 Read report →
4725 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$39,200 Read report →
4733 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$39,200 Read report →
4745 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$39,200 Read report →
4749 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$39,200 Read report →
4503 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$38,755 Read report →
6965 W LELAND AVE

HARWOOD HEIGHTS, IL

~$38,341 Read report →
6961 W LELAND AVE

HARWOOD HEIGHTS, IL

~$38,341 Read report →
6957 W LELAND AVE

HARWOOD HEIGHTS, IL

~$38,341 Read report →
6937 W LELAND AVE

HARWOOD HEIGHTS, IL

~$38,341 Read report →
4741 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$38,331 Read report →
4737 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$38,331 Read report →
4729 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$38,331 Read report →
4725 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$38,331 Read report →
4717 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$38,331 Read report →
4713 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$38,331 Read report →
4709 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$38,331 Read report →
6550 W GUNNISON ST 304

HARWOOD HEIGHTS, IL

~$38,181 Read report →
4709 N NAGLE AVE

HARWOOD HEIGHTS, IL

~$37,751 Read report →
4651 N NAGLE AVE

HARWOOD HEIGHTS, IL

~$37,743 Read report →
4425 N NAGLE AVE

HARWOOD HEIGHTS, IL

~$37,587 Read report →
6550 W GUNNISON ST 406

HARWOOD HEIGHTS, IL

~$36,984 Read report →
4431 N NEWLAND AVE X

HARWOOD HEIGHTS, IL

~$36,566 Read report →
4420 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$36,423 Read report →
4232 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$35,986 Read report →
4736 N SAYRE AVE

HARWOOD HEIGHTS, IL

~$35,710 Read report →
4543 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$35,554 Read report →
6550 W GUNNISON ST 305

HARWOOD HEIGHTS, IL

~$35,351 Read report →
7501 W WINNEMAC AVE

HARWOOD HEIGHTS, IL

~$35,000 Read report →
4312 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$34,698 Read report →
4749 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$34,564 Read report →
4659 N NAGLE AVE

HARWOOD HEIGHTS, IL

~$34,412 Read report →
4833 N OLCOTT AVE 618

HARWOOD HEIGHTS, IL

~$34,400 Read report →
4635 N NEWLAND AVE

HARWOOD HEIGHTS, IL

~$34,260 Read report →
4517 N SAYRE AVE HSE

HARWOOD HEIGHTS, IL

~$34,114 Read report →
4337 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$33,534 Read report →
7528 W WINNEMAC AVE

HARWOOD HEIGHTS, IL

~$33,500 Read report →
7616 W LAWRENCE AVE 3E

HARWOOD HEIGHTS, IL

~$33,280 Read report →
4336 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$33,093 Read report →
4811 N OLCOTT AVE 616

HARWOOD HEIGHTS, IL

~$32,740 Read report →
4545 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$31,934 Read report →
7231 W LELAND AVE

HARWOOD HEIGHTS, IL

~$31,800 Read report →
7420 W LAWRENCE AVE 104

HARWOOD HEIGHTS, IL

~$31,160 Read report →
4811 N OLCOTT AVE 401

HARWOOD HEIGHTS, IL

~$30,900 Read report →
6550 W GUNNISON ST 306

HARWOOD HEIGHTS, IL

~$30,754 Read report →
6550 W GUNNISON ST 205

HARWOOD HEIGHTS, IL

~$30,225 Read report →
6703 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$30,010 Read report →
6450 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$30,010 Read report →
4943 N ORIOLE AVE

HARWOOD HEIGHTS, IL

~$30,000 Read report →
7520 W AINSLIE ST

HARWOOD HEIGHTS, IL

~$30,000 Read report →
4719 N OCONTO AVE

HARWOOD HEIGHTS, IL

~$30,000 Read report →
4527 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$30,000 Read report →
4442 N NEWCASTLE AVE

HARWOOD HEIGHTS, IL

~$30,000 Read report →
4441 N NATCHEZ AVE

HARWOOD HEIGHTS, IL

~$29,758 Read report →
4336 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$29,620 Read report →
4366 N OAK PARK AVE

HARWOOD HEIGHTS, IL

~$29,611 Read report →
4236 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$29,611 Read report →
6550 W GUNNISON ST 401

HARWOOD HEIGHTS, IL

~$29,341 Read report →
6550 W GUNNISON ST 202

HARWOOD HEIGHTS, IL

~$29,194 Read report →
6550 W GUNNISON ST 203

HARWOOD HEIGHTS, IL

~$29,194 Read report →
6925 W MONTROSE AVE HSE

HARWOOD HEIGHTS, IL

~$29,010 Read report →
7616 W LAWRENCE AVE 2B

HARWOOD HEIGHTS, IL

~$28,720 Read report →
4512 N NEW ENGLAND AVE

HARWOOD HEIGHTS, IL

~$27,734 Read report →
6736 W SENIOR PL

HARWOOD HEIGHTS, IL

~$27,440 Read report →
4811 N OLCOTT AVE 503

HARWOOD HEIGHTS, IL

~$25,860 Read report →
4811 N OLCOTT AVE 211

HARWOOD HEIGHTS, IL

~$25,190 Read report →
7437 W CARMEN AVE

HARWOOD HEIGHTS, IL

~$25,000 Read report →
4322 N OAK PARK AVE

HARWOOD HEIGHTS, IL

~$24,836 Read report →
4430 N NATCHEZ AVE

HARWOOD HEIGHTS, IL

~$24,399 Read report →
6953 W MONTROSE AVE

HARWOOD HEIGHTS, IL

~$22,210 Read report →
4431 N NAGLE AVE

HARWOOD HEIGHTS, IL

~$21,350 Read report →
5109 N ODELL AVE

HARWOOD HEIGHTS, IL

~$20,010 Read report →
7413 W AINSLIE ST HSE

HARWOOD HEIGHTS, IL

~$20,000 Read report →
4205 N NEWLAND AVE 1

HARWOOD HEIGHTS, IL

~$20,000 Read report →
7612 W STRONG ST

HARWOOD HEIGHTS, IL

~$16,500 Read report →
6550 W GUNNISON ST 405

HARWOOD HEIGHTS, IL

~$16,310 Read report →
4833 N OLCOTT AVE 213

HARWOOD HEIGHTS, IL

~$14,770 Read report →
4700 N HARLEM AVE

HARWOOD HEIGHTS, IL

~$13,590 Read report →