NOT LISTED FOR SALE

909 S William St Mount Prospect, IL 60056

Estimated Value: $467,000 - $508,426

3 Beds
2 Baths
1,470 Sq Ft
$336/Sq Ft Est. Value

About This Home

This home is located at 909 S William St, Mount Prospect, IL 60056 and is currently estimated at $493,607, approximately $335 per square foot. 909 S William St is a home located in Cook County with nearby schools including Lions Park 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
Feb 17, 2026
Sold by
Bought by
Current Estimated Value
$493,607

Purchase Details

Closed on
May 9, 2013
Sold by
Bought by

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$205,000
Interest Rate
5%
Mortgage Type
Unknown
Source: Public Records

Range of Values:

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

Collateral Analytics Collateral Analytics AVMs (Automated Valuation Model) employ a number of statistical approaches combined with neighborhood-specific comparable selection guarantees the most up-to-date and precise valuations.

Not Available

Collateral Analytics does not have data for the current month. Please view the chart for historical values.

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.

Not Available

ICE Mortgage Technology does not have data for the current month. Please view the chart for historical values.

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.

Not Available

First American does not have data for the current month. Please view the chart for historical values.

Quantarium

Quantarium Quantarium’s valuation service, repeatedly proven the industry’s most accurate and comprehensive, is supercharged with a self-learning and auto-tuning AI engine that continually becomes smarter and more accurate as it processes daily inputs from the industry’s leading RE data lake.

Not Available

Quantarium does not have data for the current month. Please view the chart for historical values.

Average Value
Not Available
List Price
Sold Price
Create a Home Valuation Report for This Property
The Home Valuation Report is an in-depth analysis detailing your home's value as well as a comparison with similar homes in the area

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
-- None Listed On Document
$220,000 Chicago Title Insurance Comp
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
Previous Owner $205,000
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 $9,383 $42,000 $12,714 $29,286
2024 $9,383 $37,000 $10,595 $26,405
2023 $8,994 $37,000 $10,595 $26,405
2022 $8,994 $37,000 $10,595 $26,405
2021 $8,744 $31,392 $6,886 $24,506
2020 $8,632 $31,392 $6,886 $24,506
2019 $8,626 $34,881 $6,886 $27,995
2018 $8,431 $30,994 $5,827 $25,167
2017 $8,472 $30,994 $5,827 $25,167
2016 $8,234 $30,994 $5,827 $25,167
2015 $6,397 $22,010 $4,767 $17,243
2014 $6,289 $22,010 $4,767 $17,243
2013 $6,955 $24,362 $4,767 $19,595
Source: Public Records

Map

Illinois Cook County Mount Prospect 60056

909 S William St, Mount Prospect, IL

Disclaimer: Certain information contained herein is derived from information provided by parties other than Homes.com. All information provided is deemed reliable, but is not guaranteed to be accurate and should be independently verified.

Nearby Homes
Your Personal Tour Guide

Ask me questions while you tour the home.