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Single Family ResidenceResidential
$384,141$225 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $270,486 on Oct 8, 2013

21 NORTHSIDE AVE

RENSSELAER, NY 12144
3
Beds
2.5
Baths
1,705 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
2013
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$384K
$362K low$406K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$270,486 · Oct 8, 2013

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,132 (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.$55,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$48,100
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$55,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$331,548

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.Cape Cod
CountyRENSSELAER
Lot (acres)The size of the land the home sits on, from county records.0.14
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
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

Transaction History(1)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

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

E
Van Rensselaer Elementary SchoolD+
Elementary · Grades PK–5 · 0.8 mi
M
Rensselaer Junior/Senior High SchoolC+
Middle · Grades 6–12 · 0.8 mi

District: Rensselaer City School District

Neighborhood · ZIP 12144These 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.113
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.85
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.57

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.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.13%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.20,884
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,154 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$87,823
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$101,873
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.39 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.52%

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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

21 Northside Ave 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 76% of homes in Rensselaer 12144
  • Costs more per square foot than 66% of homes in Rensselaer County
  • Has a smaller lot than 82% of homes in Rensselaer County
  • Newer than 96% of homes in Rensselaer 12144

What homes are worth in Rensselaer 12144

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

This home
$116K$707K

This home is worth more than 76% of homes in Rensselaer 12144.

How it measures up in Rensselaer 12144

The dot is this home. The mark in the middle is the typical home in Rensselaer 12144.

Estimated value$384,141
CheaperTypical $284,398Pricier

Pricier than 76% of homes nearby

Price per ft²$225
CheaperTypical $205Pricier

Pricier than 65% of homes nearby

Living area1,705 ft²
SmallerTypical 1,541 ft²Bigger

Bigger than 61% of homes nearby

Lot size0.14 ac
SmallerTypical 0.2 acBigger

Bigger than 28% of homes nearby

Year built2013
OlderTypical 1955Newer

Newer than 96% of homes nearby

How 21 Northside Ave ranks against every home in each area.
MeasureThis homeRensselaer 12144Rensselaer County
Estimated valuepricier than$384,14176% of homes71% of homes
Price per ft²pricier than$22565% of homes66% of homes
Living areabigger than1,705 ft²61% of homes53% of homes
Lot sizebigger than0.14 ac28% of homes18% of homes
Year builtnewer than201396% of homes96% of homes

About 21 Northside Ave

How much is 21 Northside Ave, Rensselaer, NY worth?

The TopHap Estimate for 21 Northside Ave, Rensselaer, NY is $384,141 as of Aug 30, 2026. The likely range is $362,360 to $405,922. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Northside Ave, Rensselaer, NY last sell?

21 Northside Ave, Rensselaer, NY last sold on Oct 8, 2013 for $270,486, according to the county's recorded deed.

How big is 21 Northside Ave, Rensselaer, NY?

21 Northside Ave, Rensselaer, NY has 3 bedrooms, 2.5 bathrooms, 1,705 square feet of living space and a 0.14-acre lot.

When was 21 Northside Ave, Rensselaer, NY built?

21 Northside Ave, Rensselaer, NY was built in 2013, making it 13 years old. It is a cape cod home. The building has 1 story.

What schools serve 21 Northside Ave, Rensselaer, NY?

21 Northside Ave, Rensselaer, NY is assigned to Van Rensselaer Elementary School (elementary), rated D+; Rensselaer Junior/Senior High School (middle), rated C+. All sit in Rensselaer City School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Northside Ave, Rensselaer, NY compare to other homes in Rensselaer 12144?

Among the 6,575 homes in Rensselaer 12144, it is worth more than 76% of them ($384,141 against a typical $284,398), its price per square foot is higher than 65% of them ($225 against a typical $205), it is bigger than 61% of them (1,705 ft² against a typical 1,541 ft²), its lot is bigger than 28% of them (0.14 ac against a typical 0.2 ac) and it is newer than 96% of them (2013 against a typical 1955). Measured against all of Rensselaer County, it is worth more than 71% 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 21 Northside Ave, Rensselaer, NY?

The 2025 property tax bill for 21 Northside Ave, Rensselaer, NY was $9,132. The county assessed it at $55,700.

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Assigned schools

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