Google street view image for 9525 Knolltop Rd, Union, IL 60180

Off market aug 2026 for $550K

$536,743

Est. refi paymentEst. refi $3,736/mo

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9525 Knolltop Rd, Union, IL 60180

About this home

9525 Knolltop Rd is a house on a 1.94 acre lot. - it last sold on August 21, 2026 for $550,000. Based on Redfin's Union data, we estimate the home's value is $536,743.

Single-familyProperty Type

1.94 acresLot Size

2 car garageParking

Source:Public Records

Redfin Estimate

$536,743

$13K since sold in August 2026$8,000 since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 11.5% lower than the average sale price ($606K) of 6 comparable homes.

SOLD SEP 24, 2026
$633,900
A
4 beds4 baths2,464 sq ft
11119 Pebble Dr, Huntley, IL 60142
SOLD MAY 29, 2026
$700,000
B
5 beds3.5 baths4,000 sq ft
15911 Aspen Ct, Huntley, IL 60142
SOLD JUN 25, 2026
$599,900
C
3 beds3 baths2,500 sq ft
9519 Knolltop Rd, Union, IL 60180
SOLD MAY 29, 2026
$720,000
D
4 beds2.5 baths2,500 sq ft
10703 Pebble Dr, Huntley, IL 60142
SOLD JUL 6, 2026
$520,000
E
4 beds2.5 baths2,350 sq ft
10215 Ridge Ln, Union, IL 60180
SOLD AUG 12, 2026
$465,000
F
4 beds2 baths2,000 sq ft
15913 Wooddale Dr, Union, IL 60180

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Earn from this home

Sell

$71,284

Est. take-home

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Refinance

Est. cash available

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Rent

$3,588/mo

Redfin rental estimate

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Market trends in 60180, IL

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

99.3%

0.2% MoM

Median sale price

$465K

$43K MoM

Avg. days on market

34d

15 days MoM

Recently sold homes

1 MoM

Provided by Redfin

Sale history for 9525 Knolltop Rd

Year

Property tax

Land + Additions

Assessment*

2025

$7,999 (+0.9%)

$16,643 + $117,860

$134,503

2024

$7,928 (+1.5%)

$15,734 + $111,420

$127,154

2023

$7,812 (+24.7%)

$14,229 + $100,760

$114,989

2022

$6,264 (+3.8%)

$15,934 + $77,986

$93,920

2021

$6,033 (+23.1%)

$15,025 + $73,537

$88,562

2020

$4,900 (−1.1%)

$14,637 + $71,639

$86,276

2019

$4,953 (+1.6%)

$14,004 + $68,541

$82,545

2018

$4,875 (−3.8%)

$13,365 + $62,299

$75,664

2017

$5,067 (−0.6%)

$13,365 + $62,299

$75,664

2016

$5,097 (+5.5%)

$12,899 + $60,128

$73,027

2015

$4,833 (−1.7%)

$12,408 + $57,838

$70,246

2013

$4,919 (−2.5%)

$11,691 + $54,491

$66,182

2012

$5,047 (−22.7%)

$12,290 + $57,281

$69,571

2011

$6,530 (−4.8%)

$19,717 + $78,237

$97,954

2010

$6,862 (+6.5%)

$20,845 + $82,712

$103,557

2008

$6,444 (+3.7%)

$23,033 + $91,394

$114,427

2007

$6,212

$22,533 + $89,412

$111,945

Tax history for 9525 Knolltop Rd

Year

Property tax

Land + Additions

Assessment*

2025

$7,999 (+0.9%)

$16,643 + $117,860

$134,503

2024

$7,928 (+1.5%)

$15,734 + $111,420

$127,154

2023

$7,812 (+24.7%)

$14,229 + $100,760

$114,989

2022

$6,264 (+3.8%)

$15,934 + $77,986

$93,920

2021

$6,033 (+23.1%)

$15,025 + $73,537

$88,562

2020

$4,900 (−1.1%)

$14,637 + $71,639

$86,276

2019

$4,953 (+1.6%)

$14,004 + $68,541

$82,545

2018

$4,875 (−3.8%)

$13,365 + $62,299

$75,664

2017

$5,067 (−0.6%)

$13,365 + $62,299

$75,664

2016

$5,097 (+5.5%)

$12,899 + $60,128

$73,027

2015

$4,833 (−1.7%)

$12,408 + $57,838

$70,246

2013

$4,919 (−2.5%)

$11,691 + $54,491

$66,182

2012

$5,047 (−22.7%)

$12,290 + $57,281

$69,571

2011

$6,530 (−4.8%)

$19,717 + $78,237

$97,954

2010

$6,862 (+6.5%)

$20,845 + $82,712

$103,557

2008

$6,444 (+3.7%)

$23,033 + $91,394

$114,427

2007

$6,212

$22,533 + $89,412

$111,945

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Zoning

Estate District

The intent of the E-1 Estate District is to accommodate single-family residences on a minimum of 1 acre that, due to topography and location, are well suited for single-family use. The E-1 District is intended to be located in close proximity to municipalities or historic town centers where infrastructure and services are readily accessible, to encourage the compact and contiguous development policy of the 2030 Plan, and shall take into consideration the densities of the adjacent municipality.

Permitted uses

Include but are not limited to:

Housing-Single unit
Public service
Educational/school
Fire house
Police station
Park & open space

Property details

Exterior

Property Information
Subdivision Name: KNOLL TOP SUB
Legal Description: DOC 2022R0025184 LT 33 KNOLL TOP SUB UNIT 1

Lot Information
Land Sq. Ft: 84,425
Legal Lot Number: 33
Legal Block Number: 176
Municipality Name: CORAL TOWNSHIP
Acres: 1.9381
County Use Description: RESIDENTIAL

Financial

Assessor Information
Assessment Year: 2025

Public facts

Beds: —
Baths: —
Sq. Ft.: —
Stories: —
Lot Size: 1.94 acres
Style: Single Family Residential
Year Built: —
Year Renovated: —
County: McHenry County
APN: 17-23-176-008

Home facts updated by county records on Sep 11, 2026

Around this home

Schools

Leggee Elementary School

Public K-5 • Assigned • 2.6mi

9/10

Marlowe Middle School

Public 6-8 • Assigned • 5.1mi

7/10

Huntley High School

Public 9-12 • Assigned • 2.9mi

8/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

2/10 Heat Factor

7 days above 101° expected this year, 14 days in 30 years

2/10 Wind Factor

0% chance of strong winds in next 30 years

2/10 Air Factor

0 unhealthy days expected this year, 1 days in 30 years

Provided by First Street

Historical weather

Union, IL • 60180

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

99/ 100

Exceptional sunlight

Sunscore

This home receives average direct sun exposure in Union. There appears to be minimal shading by surrounding buildings, terrain, and vegetation.

10.5 hrs

6.2 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$510,000 – $618,000

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Nearby similar homes

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Fenced backyard • Brick fireplace • Versatile loft

Home values near 9525 Knolltop Rd

Data from public records.

Address	Redfin Estimate
9619 Knolltop Rd, Union, IL 3 Beds \| 2.5 Baths \| 2800 Sq. Ft.	$505,321
9514 Knolltop Rd, Union, IL 4 Beds \| 2 Baths \| 2564 Sq. Ft.	$414,204

Address	Redfin Estimate
9612 Knolltop Rd, Union, IL 3 Beds \| 2 Baths \| 1771 Sq. Ft.	$346,281
9513 Knolltop Rd, Union, IL 4 Beds \| 3.5 Baths \| 2971 Sq. Ft.	$550,316

Address	Redfin Estimate
9510 Knolltop Rd, Union, IL 4 Beds \| 1.5 Baths \| 2200 Sq. Ft.	$490,011
9519 Knolltop Rd, Union, IL 3 Beds \| 3 Baths \| 2500 Sq. Ft.	$595,671

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in 60180, IL

Sale history for 9525 Knolltop Rd

Tax history for 9525 Knolltop Rd

Zoning

Property details

Around this home

Schools

Lifestyle

Climate risks

Historical weather

Sun exposure

Nearby similar homes

Home values near 9525 Knolltop Rd

More real estate resources