21 Spring Ave is a 1,395 square foot condo. - it last sold on February 08, 2002 for $140,000. Based on Redfin's Sparta data, we estimate the home's value is $334,984.
CondoProperty Type
1983Year Built
$240Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$334,984
$195K since sold in February 2002$3,000 since August
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 6.3% higher than the average sale price ($315K) of 6 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning
R-1
Residential Zone
This zone is designated for detached single family residential use. Other uses are also permitted where the criteria below and other applicable sections of this Code are also satisfied.
Permitted uses
Include but are not limited to:
Agriculture
Housing-Single unit
Property details
Exterior
Exterior Information
Building Style Type: Duplex
Exterior Wall: Frame
Property Information
Subdivision Name: GLEN KNOLLS 06 CONDO
Living Sq. Ft: 1,395
# of Stories: 1
Legal Description: GLEN KNOLLS VI CONDO UNIT B
Parking & Garage Information
# of Parking Spaces: 1
Parking Type: Attached Garage
Garage / Carport Type: Attached
Lot Information
# of Buildings: 1
Land Sq. Ft: 11,326
Legal Lot Number: 1.02
Legal Block Number: 34005
Municipality Name: SPARTA TWP
Acres: 0.26
Zoning Code: R-1
State Use Description: RESIDENTIAL
Financial
Assessor Information
Assessment Year: 2026
Tax District County: SPARTA TWP
Public facts
Beds: —
Baths: —
Sq. Ft.: 1,395
Stories: 1.0
Lot Size: —
Style: Condo/Co-op
Year Built: 1983
Year Renovated: —
County: Sussex County
APN: 1834005 00001 02
Home facts updated by county records on Aug 26, 2026
Around this home
Schools
Mohawk Avenue Elementary School
Public 3 • Assigned • 3.2mi
6/10
Sparta Middle School
Public 6-8 • Assigned • 2.1mi
6/10
Sparta High School
Public 9-12 • Assigned • 2.6mi
7/10
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
3/10 Heat Factor
7 days above 94° expected this year, 15 days in 30 years
4/10 Wind Factor
17% 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
Sparta, NJ • 07871
Average low and high temperatures (°F)
30
18
35
21
53
33
61
41
68
50
79
61
84
67
79
59
74
55
64
44
50
36
35
23
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 3.9 hours in December, placing it below the
U.S. average for solar exposure.
8.6 hrs
3.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$319,000 – $386,000
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