Google street view image for 21 Knowlton Rd, Columbia, NJ 07832

Off market aug 1997 for $85K

$362,028

Est. refi paymentEst. refi $569/mo

—

•

— ba

•

1,328

sq ft

21 Knowlton Rd, Columbia, NJ 07832

About this home

21 Knowlton Rd is a 1,328 square foot house on a 2.39 acre lot. - it last sold on August 29, 1997 for $85,000. Based on Redfin's Columbia data, we estimate the home's value is $362,028.

Single-familyProperty Type

1951Year Built

2.39 acresLot Size

$273Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$362,028

$277K since sold in August 1997$1,000 since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 14.7% lower than the average sale price ($424K) of 6 comparable homes.

SOLD JUL 31, 2026
78 Auble Rd, Blairstown, NJ 07825-3010
$567,000
A
3 beds2 baths— sq ft
78 Auble Rd, Blairstown, NJ 07825-3010
SOLD MAY 11, 2026
$410,000
B
3 beds2 baths— sq ft
76 Mount Hermon Rd, Blairstown, NJ 07825-2022
SOLD AUG 4, 2026
$338,350
C
2 beds2 baths1,480 sq ft
4403 River Rd, Mount Bethel, PA 18343
SOLD MAY 15, 2026
$430,000
D
3 beds2 baths— sq ft
30 Belcher Rd, Blairstown, NJ 07825-2123
SOLD AUG 17, 2026
3 Countryside Rd, Columbia, NJ 07832-2415
$495,000
E
3 beds2 baths— sq ft
3 Countryside Rd, Columbia, NJ 07832-2415
SOLD JUL 29, 2026
$305,000
F
3 beds1.5 baths— sq ft
117 Linaberry Rd, Columbia, NJ 07832-2309

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Earn from this home

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$336,163

Est. take-home

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Est. cash available

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Market trends in 07832, NJ

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

102.8%

0.7% MoM

Median sale price

$499K

$20K MoM

Avg. days on market

28d

4 days MoM

Recently sold homes

4 MoM

New listings for sale

$499,900
3 beds2 baths— sq ft
16 Washington St, Columbia, NJ 07832-2322
See all

Provided by Redfin

Sale history for 21 Knowlton Rd

Year

Property tax

Land + Additions

Assessment*

2025

$7,376 (+7.3%)

$59,300 + $113,400

$172,700

2024

$6,877 (+2.2%)

$59,300 + $113,400

$172,700

2023

$6,730 (+3.1%)

$59,300 + $113,400

$172,700

2022

$6,530 (+2.7%)

$59,300 + $113,400

$172,700

2021

$6,359 (+2.3%)

$59,300 + $113,400

$172,700

2020

$6,215 (+4.3%)

$59,300 + $113,400

$172,700

2019

$5,962 (+1.1%)

$59,300 + $113,400

$172,700

2017

$5,898 (+2.2%)

$59,300 + $113,400

$172,700

2016

$5,769 (+4.8%)

$59,300 + $113,400

$172,700

2014

$5,505 (+0.3%)

$59,300 + $113,400

$172,700

2013

$5,488 (+0.8%)

$59,300 + $113,400

$172,700

2012

$5,444 (−1.5%)

$59,300 + $113,400

$172,700

2011

$5,525 (−1.5%)

$59,300 + $113,400

$172,700

2010

$5,608 (−1.0%)

$59,300 + $113,400

$172,700

2009

$5,663

$59,300 + $113,400

$172,700

Tax history for 21 Knowlton Rd

Year

Property tax

Land + Additions

Assessment*

2025

$7,376 (+7.3%)

$59,300 + $113,400

$172,700

2024

$6,877 (+2.2%)

$59,300 + $113,400

$172,700

2023

$6,730 (+3.1%)

$59,300 + $113,400

$172,700

2022

$6,530 (+2.7%)

$59,300 + $113,400

$172,700

2021

$6,359 (+2.3%)

$59,300 + $113,400

$172,700

2020

$6,215 (+4.3%)

$59,300 + $113,400

$172,700

2019

$5,962 (+1.1%)

$59,300 + $113,400

$172,700

2017

$5,898 (+2.2%)

$59,300 + $113,400

$172,700

2016

$5,769 (+4.8%)

$59,300 + $113,400

$172,700

2014

$5,505 (+0.3%)

$59,300 + $113,400

$172,700

2013

$5,488 (+0.8%)

$59,300 + $113,400

$172,700

2012

$5,444 (−1.5%)

$59,300 + $113,400

$172,700

2011

$5,525 (−1.5%)

$59,300 + $113,400

$172,700

2010

$5,608 (−1.0%)

$59,300 + $113,400

$172,700

2009

$5,663

$59,300 + $113,400

$172,700

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

Property details

Exterior

Exterior Information
Exterior Wall: Frame

Property Information
Living Sq. Ft: 1,328
# of Stories: 1

Lot Information
# of Buildings: 1
Land Sq. Ft: 104,108
Legal Lot Number: 3
Legal Block Number: 45
Municipality Name: KNOWLTON TWP
Acres: 2.39
Zoning Code: FPD
State Use Description: RESIDENTIAL

Financial

Assessor Information
Assessment Year: 2026
Tax District County: KNOWLTON TWP

Public facts

Beds: —
Baths: —
Sq. Ft.: 1,328
Stories: 1.0
Lot Size: 2.39 acres
Style: Single Family Residential
Year Built: 1951
Year Renovated: —
County: Warren County
APN: 1300045 00003

Home facts updated by county records on Jul 29, 2026

Around this home

Schools

Knowlton Twp Elementary School

Public PreK-6 • Assigned • 3.5mi

7/10

North Warren Regional High School

Public 7-12 • Assigned • 4.0mi

6/10

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

2/10 Fire Factor

0.00% chance of being in a wildfire in next 30 years

4/10 Heat Factor

7 days above 96° expected this year, 15 days in 30 years

4/10 Wind Factor

16% chance of strong winds in next 30 years

2/10 Air Factor

1 unhealthy days expected this year, 3 days in 30 years

Provided by First Street

Historical weather

Columbia, NJ • 07832

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 8.8 hours in June and 3.8 hours in December, placing it below the U.S. average for solar exposure.

8.8 hrs

3.8 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$344,000 – $417,000

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Nearby similar homes

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3D WALKTHROUGH

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New listings for sale in 07832-2322

$499,900

3 beds2 baths— sq ft

16 Washington St, Columbia, NJ 07832-2322

Home values near 21 Knowlton Rd

Data from public records.

Address	Redfin Estimate
22 Knowlton Road, Columbia, NJ - Beds \| - Baths \| 2320 Sq. Ft.	$387,362
23 Knowlton Road, Columbia, NJ 3 Beds \| 2 Baths \| - Sq. Ft.	$520,354

Address	Redfin Estimate
20 Knowlton Road Unit 18, Columbia, NJ - Beds \| - Baths \| 6840 Sq. Ft.	$455,016
25 Knowlton Road, Columbia, NJ 3 Beds \| 2 Baths \| - Sq. Ft.	$482,693

Address	Redfin Estimate
24 Knowlton Road, Columbia, NJ - Beds \| - Baths \| 1242 Sq. Ft.	$333,695
31 Centerville Road, Columbia, NJ 3 Beds \| 3 Baths \| - Sq. Ft.	$646,525

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