Cook County property records for 45 addresses on S Williams Ave, Palatine, IL · Last verified October 2026
| Properties | 45 |
|---|---|
| Median Sale Price | $431,000 |
| Deeds and Mortgages on File | 41 |
| Median Price per Sqft | $224 |
| Owner Occupied | 93% |
| Median Annual Tax Bill | $8,737 |
| Median Year Built | 1963 |
| Median Ownership Tenure | 14 years |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
411 S Williams Ave |
0.328 acres | — Mar 2019 | $1,506 2023 | Assessor Updated Jun 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
412 S Williams Ave |
3 bd · 1 ba · 1,332 sqft built 1959 · 0.458 acres | $100,500 Jun 1987 | $6,329 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
419 S Williams Ave |
3 bd · 2.5 ba · 1,397 sqft built 1963 · 0.19 acres | $221,000 Oct 2010 | $6,530 2023 | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
422 S Williams Ave |
3 bd · 1.5 ba · 1,878 sqft built 1951 · 0.449 acres | $8,933 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
427 S Williams Ave |
3 bd · 1.5 ba · 1,394 sqft built 1990 · 0.451 acres | — Jun 2005 | $8,331 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
435 S Williams Ave |
4 bd · 3.5 ba · 4,020 sqft built 1997 · 0.451 acres | $8,826 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
442 S Williams Ave |
3 bd · 3.5 ba · 1,620 sqft built 1940 · 0.268 acres | $431,000 Aug 2021 | $8,497 2023 | Assessor + 3 Documents Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
445 S Williams Ave |
3 bd · 2 ba · 1,678 sqft built 1975 · 0.451 acres | $325,000 Sep 2016 | $9,329 2023 | Assessor + 1 Document Updated Sep 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
450 S Williams Ave |
4 bd · 2.5 ba · 3,564 sqft built 2004 · 0.217 acres | $799,000 Apr 2024 | $15,056 2023 | Assessor + 3 Documents Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
451 S Williams Ave |
4 bd · 3 ba · 2,930 sqft built 1940 · 0.451 acres | $11,746 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
456 S Williams Ave |
4 bd · 2.5 ba · 3,244 sqft built 2004 · 0.21 acres | $16,250 2023 | Assessor Updated Jun 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
459 S Williams Ave |
3 bd · 1.5 ba · 2,740 sqft built 1986 · 0.659 acres | $10,137 2023 | Assessor Updated Jun 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
464 S Williams Ave |
4 bd · 2.5 ba · 3,271 sqft built 2006 · 0.207 acres | $476,000 Sep 2016 | $14,952 2023 | Assessor + 1 Document Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
500 S Williams Ave |
3 bd · 2 ba · 2,304 sqft built 1946 · 0.23 acres | $9,038 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
503 S Williams Ave |
3 bd · 2 ba · 2,060 sqft built 1941 · 0.451 acres | $390,000 Oct 2022 | $10,532 2023 | Assessor + 1 Document Updated Jun 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
512 S Williams Ave |
0.24 acres | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
515 S Williams Ave |
4 bd · 1.5 ba · 1,472 sqft built 1913 · 0.451 acres | $275,000 Dec 2023 | $5,461 2023 | Assessor + 2 Documents Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
525 S Williams Ave |
2 bd · 1.5 ba · 1,008 sqft built 1940 · 0.451 acres | $6,630 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
527 S Williams Ave |
3 bd · 2.5 ba · 1,855 sqft built 1982 · 0.451 acres | $475,000 Aug 2026 | $11,639 2024 | Assessor + 2 Documents Updated Sep 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
529 S Williams Ave |
3 bd · 1.5 ba · 1,400 sqft built 1954 · 0.451 acres | $195,000 Dec 2000 | $6,224 2023 | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
530 S Williams Ave |
0.464 acres | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
535 S Williams Ave |
3 bd · 2.5 ba · 1,804 sqft built 1984 · 0.451 acres | $16,000 Mar 1983 | $8,737 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
543 S Williams Ave |
4 bd · 1 ba · 1,678 sqft built 1942 · 0.451 acres | $6,630 2023 | Assessor + 3 Documents Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
549 S Williams Ave |
4 bd · 2.5 ba · 2,356 sqft built 1987 · 0.451 acres | — Sep 1987 | $10,542 2023 | Assessor + 1 Document Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
606 S Williams Ave |
1 ba · 936 sqft built 1953 · 0.23 acres | $175,000 Jul 2004 | Assessor Updated Oct 2026 | Owner on File |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
614 S Williams Ave |
1.5 ba · 1,582 sqft built 1954 · 0.219 acres | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
617 S Williams Ave |
5 bd · 2 ba · 2,054 sqft built 1880 · 0.451 acres | $112,500 Aug 2012 | $7,834 2023 | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
623 S Williams Ave |
4 bd · 2 ba · 2,196 sqft built 1953 · 0.451 acres | — May 2009 | $6,948 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
626 S Williams Ave |
2 bd · 2 ba · 1,506 sqft built 1941 · 0.23 acres | $375,000 Nov 2023 | $6,040 2023 | Assessor + 2 Documents Updated Oct 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
627 S Williams Ave |
2 bd · 1 ba · 1,672 sqft built 1955 · 0.451 acres | $199,001 Jan 1999 | $7,428 2023 | Assessor + 2 Documents Updated Sep 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
630 S Williams Ave |
4 bd · 2.5 ba · 1,768 sqft built 1975 · 0.23 acres | $8,436 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
635 S Williams Ave |
4 bd · 2 ba · 2,767 sqft built 1946 · 0.451 acres | — Feb 1998 | $9,125 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
638 S Williams Ave |
3 bd · 2 ba · 1,400 sqft built 1973 · 0.23 acres | $388,000 Oct 2007 | $5,171 2023 | Assessor Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
641 S Williams Ave |
3 bd · 2.5 ba · 2,432 sqft built 1986 · 0.451 acres | $11,039 2023 | Assessor + 1 Document Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
646 S Williams Ave |
3 bd · 3.5 ba · 1,758 sqft built 1988 · 0.23 acres | $320,000 May 2017 | $7,422 2023 | Assessor + 2 Documents Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
654 S Williams Ave |
3 bd · 1.5 ba · 864 sqft built 1957 · 0.282 acres | $126,000 Aug 1992 | $3,808 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
655 S Williams Ave |
4 bd · 3 ba · 3,125 sqft built 2003 · 0.451 acres | $588,500 Sep 2003 | $15,167 2023 | Assessor + 1 Document Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
662 S Williams Ave |
2 bd · 3.5 ba · 1,107 sqft built 1954 · 0.282 acres | $4,006 2023 | Assessor + 2 Documents Updated Jul 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
663 S Williams Ave |
4 bd · 3 ba · 3,125 sqft built 2000 · 0.451 acres | $502,000 Nov 2012 | $15,202 2023 | Assessor + 1 Document Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
671 S Williams Ave |
4 bd · 2.5 ba · 3,458 sqft built 2003 · 0.451 acres | $556,000 Jul 2018 | $17,454 2023 | Assessor + 3 Documents Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
704 S Williams Ave |
2 bd · 1 ba · 872 sqft built 1954 · 0.282 acres | $5,924 2023 | Assessor Updated Jun 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
707 S Williams Ave |
4 bd · 2.5 ba · 3,435 sqft built 2000 · 0.451 acres | $556,500 Nov 2016 | $16,012 2023 | Assessor + 2 Documents Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
717 S Williams Ave |
4 bd · 2.5 ba · 3,422 sqft built 2003 · 0.451 acres | $750,000 Jun 2024 | $15,056 2023 | Assessor Updated Jun 2026 | 2 Owners on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
718 S Williams Ave |
4 bd · 3 ba · 2,679 sqft built 1960 · 0.387 acres | $385,000 Apr 2019 | $10,739 2023 | Assessor + 2 Documents Updated Oct 2026 | Owner on File Owner Occupied |
| Address | Details | Last Sale | Tax Bill | Records | Owner |
|---|---|---|---|---|---|
723 S Williams Ave |
5 bd · 4.5 ba · 2,962 sqft built 1988 · 0.451 acres | $266,000 Jun 2001 | $8,331 2023 | Assessor + 6 Documents Updated Aug 2026 | 2 Owners on File Owner Occupied |