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Single Family ResidenceResidential
$615,459$208 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 92How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $52,300 on Jul 9, 1996

521 SPRING ST

BELVIDERE, NJ 07823
0
Baths
2,964 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
3.38 ac
Lot SizeThe size of the land the home sits on, from county records.
1999
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$615K
$569K low$662K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$52,300 · Jul 9, 1996

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,145 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$387,200 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$92,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$294,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$387,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$387,200

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.59
99
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
12
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
63
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
95
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
30
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.197 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyWARREN
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

H
Belvidere High SchoolD+
High · Grades 9–12 · 0.9 mi
E
White Township SchoolB+
Elementary · Grades PK–8 · 3.1 mi

District: White Township School District

Neighborhood · ZIP 07823These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.119
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.86
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.80

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.7%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.7,219
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.269 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$80,459
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$103,249
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.49 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

521 Spring St measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth more than 94% of homes in Belvidere 07823
  • Costs less per square foot than 77% of homes in Warren County
  • Bigger than 94% of homes in Belvidere 07823
  • Has a bigger lot than 94% of homes in Belvidere 07823
  • Newer than 85% of homes in Warren County

What homes are worth in Belvidere 07823

Each bar is how many homes fall in that price range. The marker is this home.

This home
$198K$698K

This home is worth more than 94% of homes in Belvidere 07823.

How it measures up in Belvidere 07823

The dot is this home. The mark in the middle is the typical home in Belvidere 07823.

Estimated value$615,459
CheaperTypical $397,558Pricier

Pricier than 94% of homes nearby

Price per ft²$208
CheaperTypical $241Pricier

Pricier than 24% of homes nearby

Living area2,964 ft²
SmallerTypical 1,664 ft²Bigger

Bigger than 94% of homes nearby

Lot size3.38 ac
SmallerTypical 0.29 acBigger

Bigger than 94% of homes nearby

Year built1999
OlderTypical 1968Newer

Newer than 81% of homes nearby

How 521 Spring St ranks against every home in each area.
MeasureThis homeBelvidere 07823Warren County
Estimated valuepricier than$615,45994% of homes86% of homes
Price per ft²pricier than$20824% of homes23% of homes
Living areabigger than2,964 ft²94% of homes93% of homes
Lot sizebigger than3.38 ac94% of homes93% of homes
Year builtnewer than199981% of homes85% of homes

About 521 Spring St

How much is 521 Spring St, Belvidere, NJ worth?

The TopHap Estimate for 521 Spring St, Belvidere, NJ is $615,459 as of Sep 24, 2026. The likely range is $568,880 to $662,038. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 521 Spring St, Belvidere, NJ last sell?

521 Spring St, Belvidere, NJ last sold on Jul 9, 1996 for $52,300, according to the county's recorded deed.

When was 521 Spring St, Belvidere, NJ built?

521 Spring St, Belvidere, NJ was built in 1999, making it 27 years old. It is a ranch home. The building has 1 story.

What schools serve 521 Spring St, Belvidere, NJ?

521 Spring St, Belvidere, NJ is assigned to Belvidere High School (high), rated D+; White Township School (elementary), rated B+. All sit in White Township School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 521 Spring St, Belvidere, NJ compare to other homes in Belvidere 07823?

Among the 2,453 homes in Belvidere 07823, it is worth more than 94% of them ($615,459 against a typical $397,558), its price per square foot is higher than 24% of them ($208 against a typical $241), it is bigger than 94% of them (2,964 ft² against a typical 1,664 ft²), its lot is bigger than 94% of them (3.38 ac against a typical 0.29 ac) and it is newer than 81% of them (1999 against a typical 1968). Measured against all of Warren County, it is worth more than 86% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 521 Spring St, Belvidere, NJ?

The 2025 property tax bill for 521 Spring St, Belvidere, NJ was $10,145. The county assessed it at $387,200.

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