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Single Family ResidenceResidential
$209,761$154 / 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 88How 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 $209,000 on Sep 7, 2022

521 NEW CASTLE RD

SLIPPERY ROCK, PA 16057
3
Beds
1
Baths
1,365 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.
4.99 ac
Lot SizeThe size of the land the home sits on, from county records.
1928
Year BuiltThe year the home was originally built, according to county records.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$210K
$184K low$236K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$209,000 · Sep 7, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$333 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$10,600 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,770
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$8,830
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$10,600

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.37
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
6
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.
79
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
36
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.minimal

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.Conventional
CountyBUTLER
Lot (acres)The size of the land the home sits on, from county records.4.99
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(2)

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
Slippery Rock Area Elementary SchoolB+
Elementary · Grades KG–5 · 1.0 mi
H
Slippery Rock Area High SchoolB+
High · Grades 9–12 · 1.3 mi
M
Slippery Rock Area Middle SchoolB
Middle · Grades 6–8 · 1.4 mi

District: Slippery Rock Area School District

Neighborhood · ZIP 16057These 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.139
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.96
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.24

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.84%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.15%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.15%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.15,539
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.175 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$58,602
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$80,398
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.42 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.45%

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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 New Castle 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 77% of homes in Butler County
  • Costs less per square foot than 76% of homes in Butler County
  • Smaller than 66% of homes in Butler County
  • Has a bigger lot than 89% of homes in Butler County
  • Older than 80% of homes in Butler County

What homes are worth in Slippery Rock 16057

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

This home
$81K$764K

This home is worth more than 33% of homes in Slippery Rock 16057.

How it measures up in Slippery Rock 16057

The dot is this home. The mark in the middle is the typical home in Slippery Rock 16057.

Estimated value$209,761
CheaperTypical $255,771Pricier

Pricier than 33% of homes nearby

Price per ft²$154
CheaperTypical $179Pricier

Pricier than 32% of homes nearby

Living area1,365 ft²
SmallerTypical 1,457 ft²Bigger

Bigger than 43% of homes nearby

Lot size4.99 ac
SmallerTypical 1.25 acBigger

Bigger than 79% of homes nearby

Year built1928
OlderTypical 1970Newer

Newer than 25% of homes nearby

How 521 New Castle Rd ranks against every home in each area.
MeasureThis homeSlippery Rock 16057Butler County
Estimated valuepricier than$209,76133% of homes23% of homes
Price per ft²pricier than$15432% of homes24% of homes
Living areabigger than1,365 ft²43% of homes34% of homes
Lot sizebigger than4.99 ac79% of homes89% of homes
Year builtnewer than192825% of homes20% of homes

About 521 New Castle Rd

How much is 521 New Castle Rd, Slippery Rock, PA worth?

The TopHap Estimate for 521 New Castle Rd, Slippery Rock, PA is $209,761 as of Sep 24, 2026. The likely range is $183,864 to $235,658. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 521 New Castle Rd, Slippery Rock, PA last sell?

521 New Castle Rd, Slippery Rock, PA last sold on Sep 7, 2022 for $209,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 521 New Castle Rd, Slippery Rock, PA?

521 New Castle Rd, Slippery Rock, PA has 3 bedrooms, 1 bathrooms, 1,365 square feet of living space and a 4.99-acre lot.

When was 521 New Castle Rd, Slippery Rock, PA built?

521 New Castle Rd, Slippery Rock, PA was built in 1928, making it 98 years old. It is a conventional home.

What schools serve 521 New Castle Rd, Slippery Rock, PA?

521 New Castle Rd, Slippery Rock, PA is assigned to Slippery Rock Area Elementary School (elementary), rated B+; Slippery Rock Area High School (high), rated B+; Slippery Rock Area Middle School (middle), rated B. All sit in Slippery Rock Area School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 521 New Castle Rd, Slippery Rock, PA compare to other homes in Slippery Rock 16057?

Among the 4,008 homes in Slippery Rock 16057, it is worth more than 33% of them ($209,761 against a typical $255,771), its price per square foot is higher than 32% of them ($154 against a typical $179), it is bigger than 43% of them (1,365 ft² against a typical 1,457 ft²), its lot is bigger than 79% of them (4.99 ac against a typical 1.25 ac) and it is newer than 25% of them (1928 against a typical 1970). Measured against all of Butler County, it is worth more than 23% 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 New Castle Rd, Slippery Rock, PA?

The 2026 property tax bill for 521 New Castle Rd, Slippery Rock, PA was $333. The county assessed it at $10,600.

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