Google street view image for 31 Air Castle Isle, Andover, NJ 07821

Off market jan 2000 for $651K

$2,173,430

Est. refi paymentEst. refi $4,245/mo

—

•

— ba

•

4,308

sq ft

31 Air Castle Isle, Andover, NJ 07821

About this home

31 Air Castle Isle is a 4,308 square foot house on a 0.26 acre lot. - it last sold on January 13, 2000 for $651,500. Based on Redfin's Andover data, we estimate the home's value is $2,173,430.

Single-familyProperty Type

1972Year Built

0.26 acresLot Size

$505Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$2,173,430

$1.5M since sold in January 2000$187K since October

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 87.9% higher than the average sale price ($1.16M) of 6 comparable homes.

SOLD AUG 14, 2026
$2,225,000
A
5 beds3.5 baths— sq ft
18 Oakdale Ave, Andover, NJ 07821-2939
SOLD SEP 22, 2026
9 Marshall Trl, Hopatcong, NJ 07843-1729
$400,000
B
4 beds2.5 baths— sq ft
9 Marshall Trl, Hopatcong, NJ 07843-1729
SOLD SEP 29, 2026
$2,700,000
C
3 beds3 baths— sq ft
29 Air Castle Isle, Andover, NJ 07821-5819
SOLD SEP 21, 2026
101 New Jersey Ave, Lake Hopatcong, NJ 07849-1558
$564,000
D
3 beds1.5 baths— sq ft
101 New Jersey Ave, Lake Hopatcong, NJ 07849-1558
SOLD JUN 9, 2026
$525,000
E
3 beds2 baths— sq ft
312 Hudson Ave, Hopatcong, NJ 07843-1710
SOLD SEP 24, 2026
$525,000
F
3 beds2 baths— sq ft
145 Schwarz Blvd, Lake Hopatcong, NJ 07849-1621

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Earn from this home

Sell

$1,956,590

Est. take-home

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Est. cash available

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Market trends in 07821, NJ

Last updated October 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-list price

100.9%

+1.0% MoM

Median sale price

$539K

$11K MoM

Avg. days on market

40d

2 days MoM

Recently sold homes

1 MoM

New listings for sale

$379,900
3 beds1 bath— sq ft
15 Prospect Ave, Andover, NJ 07821-4514
$359,900
3 beds1.5 baths— sq ft
14 Cabin Spring Trl, Byram Township, NJ 07821-3147
$1,200,000
3 beds2.5 baths1,770 sq ft
33 Oakdale Ave, Andover, NJ 07821-2939
See all

Provided by Redfin

Sale history for 31 Air Castle Isle

Year

Property tax

Land + Additions

Assessment*

2025

$32,180 (+6.2%)

$575,600 + $877,900

$1,453,500

2024

$30,305 (+4.8%)

$575,600 + $877,900

$1,453,500

2023

$28,930 (+2.0%)

$575,600 + $877,900

$1,453,500

2022

$28,359 (+1.7%)

$308,300 + $518,500

$826,800

2021

$27,880 (+1.0%)

$308,300 + $518,500

$826,800

2020

$27,590 (+0.4%)

$308,300 + $518,500

$826,800

2019

$27,475 (+0.2%)

$308,300 + $518,500

$826,800

2018

$27,417 (+0.2%)

$308,300 + $518,500

$826,800

2017

$27,375 (−11.0%)

$308,300 + $518,500

$826,800

2016

$30,751 (+2.7%)

$308,300 + $518,500

$826,800

2014

$29,954 (+4.4%)

$342,500 + $584,300

$926,800

2013

$28,694 (+21.0%)

$342,500 + $584,300

$926,800

2012

$23,705 (+4.0%)

$342,500 + $584,300

$926,800

2011

$22,792 (−8.0%)

$495,100 + $604,900

$1,100,000

2010

$24,763 (−3.8%)

$495,100 + $604,900

$1,100,000

2009

$25,754

$559,700 + $690,300

$1,250,000

Tax history for 31 Air Castle Isle

Year

Property tax

Land + Additions

Assessment*

2025

$32,180 (+6.2%)

$575,600 + $877,900

$1,453,500

2024

$30,305 (+4.8%)

$575,600 + $877,900

$1,453,500

2023

$28,930 (+2.0%)

$575,600 + $877,900

$1,453,500

2022

$28,359 (+1.7%)

$308,300 + $518,500

$826,800

2021

$27,880 (+1.0%)

$308,300 + $518,500

$826,800

2020

$27,590 (+0.4%)

$308,300 + $518,500

$826,800

2019

$27,475 (+0.2%)

$308,300 + $518,500

$826,800

2018

$27,417 (+0.2%)

$308,300 + $518,500

$826,800

2017

$27,375 (−11.0%)

$308,300 + $518,500

$826,800

2016

$30,751 (+2.7%)

$308,300 + $518,500

$826,800

2014

$29,954 (+4.4%)

$342,500 + $584,300

$926,800

2013

$28,694 (+21.0%)

$342,500 + $584,300

$926,800

2012

$23,705 (+4.0%)

$342,500 + $584,300

$926,800

2011

$22,792 (−8.0%)

$495,100 + $604,900

$1,100,000

2010

$24,763 (−3.8%)

$495,100 + $604,900

$1,100,000

2009

$25,754

$559,700 + $690,300

$1,250,000

*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: 4,308
# of Stories: 1

Lot Information
# of Buildings: 1
Land Sq. Ft: 11,160
Legal Lot Number: 8
Legal Block Number: 50602
Municipality Name: HOPATCONG BORO
Acres: 0.2562
Depth Footage: 93
Front Footage: 120
Zoning Code: R-1
State Use Description: RESIDENTIAL

Financial

Assessor Information
Assessment Year: 2026
Tax District County: HOPATCONG BORO

Public facts

Beds: —
Baths: —
Sq. Ft.: 4,308
Stories: 1.0
Lot Size: 0.26 acres
Style: Single Family Residential
Year Built: 1972
Year Renovated: —
County: Sussex County
APN: 1250602 00008

Home facts updated by county records on Sep 8, 2026

Around this home

Schools

K - 12
Preschool & daycare

Tulsa Trail Elementary School

Public 2-3 • Assigned • 3.0mi

3/10

Hopatcong High School

Public 8-12 • Assigned • 3.1mi

3/10

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

3/10 Fire Factor

0.31% chance of being in a wildfire in next 30 years

4/10 Heat Factor

7 days above 94° expected this year, 15 days in 30 years

4/10 Wind Factor

24% chance of strong winds in next 30 years

2/10 Air Factor

2 unhealthy days expected this year, 2 days in 30 years

Provided by First Street

Historical weather

Andover, NJ • 07821

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 8.6 hours in June and 4 hours in December, placing it below the U.S. average for solar exposure.

8.6 hrs

4 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$2.07M – $2.50M

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Home values near 31 Air Castle Isle

Data from public records.

Address	Redfin Estimate
25 Air Castle Isle, Andover, NJ 5 Beds \| 3.5 Baths \| - Sq. Ft.	$1,838,562
4 Dibert Rd, Andover, NJ - Beds \| - Baths \| 1124 Sq. Ft.	$817,718
508 Lakeside Ave, Andover, NJ - Beds \| - Baths \| 2051 Sq. Ft.	$1,139,169
430 Lakeside Ave, Andover, NJ - Beds \| - Baths \| 1639 Sq. Ft.	$436,257
1 Skyline Dr, Andover, NJ - Beds \| - Baths \| 1980 Sq. Ft.	$830,023
9 Skyline Dr, Andover, NJ 3 Beds \| 2 Baths \| - Sq. Ft.	$572,994

Address	Redfin Estimate
27 Air Castle Isle, Andover, NJ - Beds \| - Baths \| 3894 Sq. Ft.	$1,863,027
514 Lakeside Ave, Andover, NJ 8 Beds \| 4.5 Baths \| - Sq. Ft.	$1,494,556
504 Lakeside Ave, Andover, NJ - Beds \| - Baths \| 3040 Sq. Ft.	$1,577,437
432 Lakeside Ave, Andover, NJ 3 Beds \| 2 Baths \| - Sq. Ft.	$511,717
3 Skyline Dr, Andover, NJ - Beds \| - Baths \| 3523 Sq. Ft.	$1,380,806
17 Skyline Dr, Andover, NJ - Beds \| - Baths \| 2867 Sq. Ft.	$1,332,064

Address	Redfin Estimate
29 Air Castle Isle, Andover, NJ 3 Beds \| 3 Baths \| - Sq. Ft.	$2,421,226
512 Lakeside Ave, Andover, NJ - Beds \| - Baths \| 2152 Sq. Ft.	$1,465,335
502 Lakeside Ave, Andover, NJ 4 Beds \| 4 Baths \| - Sq. Ft.	$2,345,696
10 Skyline Dr, Andover, NJ - Beds \| - Baths \| 1152 Sq. Ft.	$454,754
5 Skyline Dr, Andover, NJ - Beds \| - Baths \| 2896 Sq. Ft.	$703,284
19 Skyline Dr, Andover, NJ 3 Beds \| 3.5 Baths \| - Sq. Ft.	$1,435,831

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