Cook County property records for 53 addresses on N William St, Mount Prospect, IL · Last verified August 2026
| Properties | 53 |
|---|---|
| Median Sale Price | $285,000 |
| Deeds and Mortgages on File | 87 |
| Median Price per Sqft | $270 |
| Owner Occupied | 92% |
| Median Annual Tax Bill | $7,128 |
| Median Year Built | 1955 |
| Median Ownership Tenure | 8 years |
Owner names and prior sale amounts shown locked below are available instantly with a free trial.
3 bd · 1.5 ba · 1,260 sqft · 0.261 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $388,000Apr 2018 | $7,1282023 | Sale Amount Apr 2017 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 1.5 ba · 1,260 sqft · 0.261 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $263,000Aug 2020 | $8,5322023 | —Sep 2014 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
4 bd · 2.5 ba · 2,490 sqft · 0.265 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $350,000Mar 2011 | $11,4982023 | Sale Amount Jul 2000 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
4 bd · 2.5 ba · 2,490 sqft · 0.265 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $410,000Aug 2018 | $10,7562023 | —Jul 2010 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
5 bd · 2.5 ba · 1,818 sqft · 0.251 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $365,000May 2004 | $9,1842023 | Sale Amount Sep 2001 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 1.5 ba · 1,122 sqft · 0.251 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $515,000Mar 2023 | $8,8972023 | Sale Amount Aug 2022 | 2 Names on Record | Assessor + 5 DocumentsUpdated Jun 2026 |
4 bd · 1.5 ba · 1,818 sqft · 0.244 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $453,000Aug 2006 | $8,3502023 | Sale Amount Jun 2000 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
3 bd · 1.5 ba · 880 sqft · 0.244 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $6,1262023 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 1.5 ba · 1,474 sqft · 0.244 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $390,000Nov 2019 | $8,2212023 | Sale Amount Jun 2016 | 1 Name on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jun 2026 |
3 bd · 2.5 ba · 1,391 sqft · 0.244 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $565,000Oct 2022 | $8,3412023 | Sale Amount Apr 2022 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jun 2026 |
4 bd · 1.5 ba · 1,818 sqft · 0.244 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $8,3502023 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 1.5 ba · 1,710 sqft · 0.244 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $350,000Jul 2025 | $8,8252023 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 1.5 ba · 1,660 sqft · 0.244 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $116,666Jan 1994 | $8,8102023 | —Jan 1994 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 1.5 ba · 1,782 sqft · 0.244 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $490,000Aug 2019 | $9,6442023 | —Nov 2011 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
4 bd · 1.5 ba · 1,568 sqft · 0.26 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $350,000Aug 2018 | $8,2542023 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 2.5 ba · 1,815 sqft · 0.26 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $357,000Oct 2019 | $9,2372023 | Sale Amount Oct 2014 | 1 Name on Record Owner Occupied | Assessor + 5 DocumentsUpdated Aug 2026 |
4 bd · 2 ba · 1,544 sqft · 0.21 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $270,000Oct 2019 | $7,9752023 | Sale Amount Jun 2010 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
2 bd · 1 ba · 830 sqft · 0.175 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $154,000Nov 2010 | $3,0392023 | Sale Amount Jul 1999 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Aug 2026 |
4 bd · 1.5 ba · 1,350 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $5,9842023 | —Jun 2010 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
2 bd · 1 ba · 830 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $195,000Oct 2009 | $6,6732023 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
2 bd · 1 ba · 1,273 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $175,000Dec 2000 | $6,3072023 | Sale Amount Oct 1993 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 1 ba · 1,316 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $204,000May 2013 | $6,3072023 | Sale Amount Jun 2002 | 2 Names on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
4 bd · 3.5 ba · 3,566 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $655,000Sep 2009 | $20,7652023 | Sale Amount Sep 2005 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 1 ba · 1,268 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $145,000Jan 2012 | $6,4212023 | —Dec 2003 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 1 ba · 1,170 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $205,000Aug 2014 | $6,7032023 | Sale Amount Aug 2002 | 1 Name on Record | AssessorUpdated Jun 2026 |
3 bd · 1 ba · 1,230 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $363,296May 2026 | $6,1262023 | 1 Name on Record | Assessor + 1 DocumentUpdated Jun 2026 |
6 bd · 4.5 ba · 3,067 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $250,000Aug 2014 | $14,2332023 | Sale Amount Aug 2002 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
4 bd · 3 ba · 2,195 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $298,000Oct 2006 | $9,7912023 | Sale Amount Nov 2003 | 1 Name on Record Owner Occupied | Assessor + 5 DocumentsUpdated Jun 2026 |
4 bd · 2.5 ba · 3,180 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $165,000Oct 2011 | $21,3212023 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
4 bd · 2 ba · 2,360 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $9,7402023 | 2 Names on Record Owner Occupied | AssessorUpdated Jun 2026 |
4 bd · 3 ba · 1,744 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $370,000Mar 2021 | $8,9152023 | Sale Amount Jul 2016 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Aug 2026 |
2 bd · 2 ba · 1,264 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $285,000Sep 2021 | $8,3412023 | Sale Amount Sep 2002 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 1.5 ba · 1,246 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $366,000Oct 2024 | $6,8632023 | Sale Amount Dec 2023 | 1 Name on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jun 2026 |
3 bd · 1 ba · 939 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $235,000Nov 2020 | $5,6122023 | —Jul 2020 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 1 ba · 1,326 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $6,4042023 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 1 ba · 1,262 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $209,000Jun 2001 | $5,6752023 | —Jun 2001 | 1 Name on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jul 2026 |
4 bd · 2 ba · 1,659 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $8,6282023 | —Feb 2023 | 2 Names on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
2 bd · 1 ba · 830 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $185,000Sep 2014 | $4,9172023 | Sale Amount Jan 2012 | 1 Name on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jun 2026 |
3 bd · 1 ba · 939 sqft · 0.23 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Sep 2023 | $5,1072023 | 2 Names on Record | Assessor + 1 DocumentUpdated Jun 2026 |
2 bd · 1 ba · 939 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $270,000Aug 2021 | $4,6242023 | —Aug 2021 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 1 ba · 1,255 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $192,500Nov 2016 | $6,3072023 | Sale Amount Jun 2001 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 1.5 ba · 1,310 sqft · 0.25 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $3,7492023 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
2 bd · 1 ba · 943 sqft · 0.215 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $255,000Oct 2022 | $6,0292023 | 2 Names on Record Owner Occupied | Assessor + 4 DocumentsUpdated Jun 2026 |
3 bd · 1 ba · 1,074 sqft · 0.153 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $5,5702023 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
2 bd · 1 ba · 833 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $200,000Feb 2021 | $6,3952023 | Sale Amount Aug 2010 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 1 ba · 1,103 sqft · 0.171 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $5,0132023 | —Apr 2015 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 1 ba · 943 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $280,000May 2022 | $5,4732023 | 2 Names on Record Owner Occupied | Assessor + 3 DocumentsUpdated Jun 2026 |
5 bd · 2 ba · 2,056 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| —Mar 2006 | $8,6282023 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |
3 bd · 2 ba · 1,321 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $240,000Jan 2019 | $6,1262023 | —Jan 2019 | 1 Name on Record Owner Occupied | Assessor + 5 DocumentsUpdated Jul 2026 |
3 bd · 1.5 ba · 1,074 sqft · 0.234 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $355,000Jan 2006 | $6,3072023 | Sale Amount Aug 2003 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
2 bd · 1 ba · 943 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $255,000Aug 2021 | $6,6732023 | 1 Name on Record Owner Occupied | Assessor + 2 DocumentsUpdated Jun 2026 |
3 bd · 2 ba · 1,633 sqft · 0.2 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $245,500Jul 2019 | $7,9752023 | Sale Amount May 1996 | 1 Name on Record Owner Occupied | Assessor + 1 DocumentUpdated Jun 2026 |
3 bd · 1.5 ba · 1,704 sqft · 0.175 acres · Garage
| Last Sale | Tax Bill | Prior Sale | Owner | Records |
|---|---|---|---|---|
| $246,000Mar 2004 | $7,9752023 | Sale Amount Sep 1993 | 1 Name on Record Owner Occupied | AssessorUpdated Jun 2026 |