Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$509,839$376 / 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 91How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026

509 RIVER RD

ANNANDALE, NJ 08801
0
Baths
1,356 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.
0.6 ac
Lot SizeThe size of the land the home sits on, from county records.
1968
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$510K
$463K low$557K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,247 (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.$265,700 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$116,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$148,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$265,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$265,700

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.57
61
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
21
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
64
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
96
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
43
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.11 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
CountyHUNTERDON
Lot (acres)The size of the land the home sits on, from county records.0.60
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
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
North Hunterdon High SchoolB
High · Grades 9–12 · 1.9 mi
M
Clinton Township Middle SchoolA
Middle · Grades 7–8 · 2.8 mi
E
Spruce Run Elementary School
Elementary · Grades PK–1 · 2.9 mi

District: Clinton Township School District

Neighborhood · ZIP 08801These 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.71
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.93
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.89

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.33%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.8,193
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.489 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$152,035
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$171,682
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.50 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

Owner Tools

Do you own this home?
Claim this home

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

509 River Rd 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 less than 69% of homes in Annandale 08801
  • Costs more per square foot than 95% of homes in Annandale 08801
  • Smaller than 81% of homes in Hunterdon County
  • Older than 82% of homes in Annandale 08801

What homes are worth in Annandale 08801

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

This home
$232K$1.2M

This home is worth more than 31% of homes in Annandale 08801.

How it measures up in Annandale 08801

The dot is this home. The mark in the middle is the typical home in Annandale 08801.

Estimated value$509,839
CheaperTypical $635,207Pricier

Pricier than 31% of homes nearby

Price per ft²$376
CheaperTypical $284Pricier

Pricier than 95% of homes nearby

Living area1,356 ft²
SmallerTypical 2,157 ft²Bigger

Bigger than 21% of homes nearby

Lot size0.6 ac
SmallerTypical 0.76 acBigger

Bigger than 44% of homes nearby

Year built1968
OlderTypical 1986Newer

Newer than 18% of homes nearby

How 509 River Rd ranks against every home in each area.
MeasureThis homeAnnandale 08801Hunterdon County
Estimated valuepricier than$509,83931% of homes33% of homes
Price per ft²pricier than$37695% of homes88% of homes
Living areabigger than1,356 ft²21% of homes19% of homes
Lot sizebigger than0.6 ac44% of homes38% of homes
Year builtnewer than196818% of homes35% of homes

About 509 River Rd

How much is 509 River Rd, Annandale, NJ worth?

The TopHap Estimate for 509 River Rd, Annandale, NJ is $509,839 as of Oct 21, 2026. The likely range is $463,081 to $556,597. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 River Rd, Annandale, NJ last sell?

509 River Rd, Annandale, NJ last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 509 River Rd, Annandale, NJ?

509 River Rd, Annandale, NJ has 1,356 square feet of living space and a 0.60-acre lot.

When was 509 River Rd, Annandale, NJ built?

509 River Rd, Annandale, NJ was built in 1968, making it 58 years old. The building has 1 story.

What schools serve 509 River Rd, Annandale, NJ?

509 River Rd, Annandale, NJ is assigned to North Hunterdon High School (high), rated B; Clinton Township Middle School (middle), rated A; Spruce Run Elementary School (elementary). All sit in Clinton Township School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 River Rd, Annandale, NJ compare to other homes in Annandale 08801?

Among the 2,630 homes in Annandale 08801, it is worth more than 31% of them ($509,839 against a typical $635,207), its price per square foot is higher than 95% of them ($376 against a typical $284), it is bigger than 21% of them (1,356 ft² against a typical 2,157 ft²), its lot is bigger than 44% of them (0.6 ac against a typical 0.76 ac) and it is newer than 18% of them (1968 against a typical 1986). Measured against all of Hunterdon County, it is worth more than 33% 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 509 River Rd, Annandale, NJ?

The 2025 property tax bill for 509 River Rd, Annandale, NJ was $8,247. The county assessed it at $265,700.

More homes on River Rd

Closest homes

More homes in Annandale 08801

Assigned schools

Explore the area

See this home in context

Open 509 River Rd on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map