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Single Family ResidenceResidential
$331,274$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 95How 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

323 UNION ST

PETERBOROUGH, NH 03458
3
Beds
2
Baths
2,156 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.
0.4 ac
Lot SizeThe size of the land the home sits on, from county records.
1860
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$331K
$315K low$347K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,797 (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.$239,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$73,700
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$166,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$521,835

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.40
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
15
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
58
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.
33
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
CountyHILLSBOROUGH
Lot (acres)The size of the land the home sits on, from county records.0.40
HeatingThe type of heating system in the home.Hot Water
CoolingThe type of cooling or air conditioning in the home.Yes
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.

E
Peterborough Elementary SchoolC+
Elementary · Grades PK–4 · 1.5 mi
M
South Meadow SchoolB-
Middle · Grades 5–8 · 2.5 mi
H
ConVal Regional High SchoolA
High · Grades 9–12 · 2.5 mi

District: Contoocook Valley School District

Neighborhood · ZIP 03458These 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.136
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.82
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.78

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.91%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.7,395
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.135 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$93,348
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$131,009
Average tempThe average temperature here across a full year.45°F
Annual precipHow much rain and melted snow falls here in a typical year.47 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%

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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

323 Union 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 less than 92% of homes in Hillsborough County
  • Among the lowest price per square foot in Hillsborough County
  • Bigger than 67% of homes in Hillsborough County
  • Has a smaller lot than 86% of homes in Peterborough 03458
  • Older than 98% of homes in Hillsborough County

What homes are worth in Peterborough 03458

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

This home
$264K$991K

This home is worth more than 14% of homes in Peterborough 03458.

How it measures up in Peterborough 03458

The dot is this home. The mark in the middle is the typical home in Peterborough 03458.

Estimated value$331,274
CheaperTypical $436,077Pricier

Pricier than 14% of homes nearby

Price per ft²$154
CheaperTypical $237Pricier

Pricier than 3% of homes nearby

Living area2,156 ft²
SmallerTypical 1,862 ft²Bigger

Bigger than 64% of homes nearby

Lot size0.4 ac
SmallerTypical 1.27 acBigger

Bigger than 14% of homes nearby

Year built1860
OlderTypical 1975Newer

Newer than 8% of homes nearby

How 323 Union St ranks against every home in each area.
MeasureThis homePeterborough 03458Hillsborough County
Estimated valuepricier than$331,27414% of homes8% of homes
Price per ft²pricier than$1543% of homesalmost no homes
Living areabigger than2,156 ft²64% of homes67% of homes
Lot sizebigger than0.4 ac14% of homes42% of homes
Year builtnewer than18608% of homes2% of homes

About 323 Union St

How much is 323 Union St, Peterborough, NH worth?

The TopHap Estimate for 323 Union St, Peterborough, NH is $331,274 as of Sep 24, 2026. The likely range is $315,473 to $347,075. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 323 Union St, Peterborough, NH last sell?

323 Union St, Peterborough, NH last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 323 Union St, Peterborough, NH?

323 Union St, Peterborough, NH has 3 bedrooms, 2 bathrooms, 2,156 square feet of living space and a 0.40-acre lot.

When was 323 Union St, Peterborough, NH built?

323 Union St, Peterborough, NH was built in 1860, making it 166 years old. The building has 2 stories.

What schools serve 323 Union St, Peterborough, NH?

323 Union St, Peterborough, NH is assigned to Peterborough Elementary School (elementary), rated C+; South Meadow School (middle), rated B-; ConVal Regional High School (high), rated A. All sit in Contoocook Valley School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 323 Union St, Peterborough, NH compare to other homes in Peterborough 03458?

Among the 2,296 homes in Peterborough 03458, it is worth more than 14% of them ($331,274 against a typical $436,077), its price per square foot is higher than 3% of them ($154 against a typical $237), it is bigger than 64% of them (2,156 ft² against a typical 1,862 ft²), its lot is bigger than 14% of them (0.4 ac against a typical 1.27 ac) and it is newer than 8% of them (1860 against a typical 1975). Measured against all of Hillsborough County, it is worth more than 8% 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 323 Union St, Peterborough, NH?

The 2025 property tax bill for 323 Union St, Peterborough, NH was $7,797. The county assessed it at $239,900.

More homes on Union St

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