NOT LISTED FOR SALE

9 S William St Mount Prospect, IL 60056

Downtown Mount Prospect Neighborhood

Estimated Value: $358,000 - $497,549

3 Beds
2 Baths
1,127 Sq Ft
$391/Sq Ft Est. Value

About This Home

This home is located at 9 S William St, Mount Prospect, IL 60056 and is currently estimated at $440,183, approximately $390 per square foot. 9 S William St is a home located in Cook County with nearby schools including Fairview Elementary School, Lincoln Middle School, and Prospect High School.

Ownership History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Name Owned For Owner Type

Purchase Details

Closed on
Aug 4, 2025
Sold by
Bought by
Current Estimated Value
$440,183

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$316,350
Interest Rate
0.0663%
Mortgage Type
New Conventional

Purchase Details

Closed on
Aug 31, 2016
Sold by
Bought by

Purchase Details

Closed on
Mar 18, 2008
Sold by
Bought by

Purchase Details

Closed on
Jan 12, 1995
Sold by
Bought by
Source: Public Records

Range of Values:

--
Value Increase
--
Percent Increase
--
Adjusted for Inflation
Collateral Analytics

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ICE

ICE Mortgage Technology ICE Mortgage Technology’s AVM (Automated Valuation Model) is a state-of-the-art online residential property valuation tool that provides a quick and accurate estimate of the value of almost any home in the U.S.

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First American

First American First American Data & Analytics’ next-generation AVM combines unrivaled data assets with a blended ensemble of valuation models to produce highly accurate, reliable valuations you can trust.

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Quantarium

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Average Value
Not Available
List Price
Sold Price
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Home Values in the Area

Source: Public Records

Average Home Value in this Area

Source: Public Records

Purchase History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Buyer Sale Price Title Company
$333,000 Old Republic Title
-- None Available
-- None Available
$202,000 --
Source: Public Records

Mortgage History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Status Borrower Loan Amount
Open $316,350
Source: Public Records

Tax History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2025 $7,809 $40,000 $8,740 $31,260
2024 $7,809 $34,000 $7,220 $26,780
2023 $7,458 $34,000 $7,220 $26,780
2022 $7,458 $34,000 $7,220 $26,780
2021 $5,977 $25,176 $4,560 $20,616
2020 $5,978 $25,176 $4,560 $20,616
2019 $6,065 $28,288 $4,560 $23,728
2018 $4,783 $26,331 $3,800 $22,531
2017 $6,214 $26,331 $3,800 $22,531
2016 $4,882 $26,331 $3,800 $22,531
2015 $5,610 $23,800 $3,420 $20,380
2014 $5,543 $23,800 $3,420 $20,380
2013 $6,044 $23,800 $3,420 $20,380
Source: Public Records

Map

Illinois Cook County Mount Prospect 60056 Downtown Mount Prospect

9 S William St, Mount Prospect, IL

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