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Single Family ResidenceResidential
$485,676$153 / 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 Sep 24, 2026
Last sold for $33,000 on Jul 14, 1998

328 OLIVIA ST

DERBY, CT 06418
3
Beds
2
Baths
3,171 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.
0.29 ac
Lot SizeThe size of the land the home sits on, from county records.
1907
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$486K
$441K low$531K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$33,000 · Jul 14, 1998

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,106 (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.$233,940 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$34,540
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$199,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$233,940
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$334,200

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.40
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
4
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
61
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
97
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
39
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
CountyNAUGATUCK VALLEY
Lot (acres)The size of the land the home sits on, from county records.0.29
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Steam
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
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
Irving SchoolD
Elementary · Grades KG–5 · 0.1 mi
H
Derby High SchoolF
High · Grades 9–12 · 0.5 mi
M
Derby Middle SchoolC
Middle · Grades 6–8 · 0.6 mi

District: Derby School District

Neighborhood · ZIP 06418These 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.109
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.113
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.69

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.16%
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.0.9%
PopulationHow many people live in this area.12,707
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,336 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$63,431
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$87,707
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.58%

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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

328 Olivia 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 90% of homes in Derby 06418
  • Among the lowest price per square foot in Derby 06418
  • Bigger than 97% of homes in Derby 06418
  • Older than 93% of homes in Naugatuck Valley County

What homes are worth in Derby 06418

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

This home
$200K$593K

This home is worth more than 90% of homes in Derby 06418.

How it measures up in Derby 06418

The dot is this home. The mark in the middle is the typical home in Derby 06418.

Estimated value$485,676
CheaperTypical $344,968Pricier

Pricier than 90% of homes nearby

Price per ft²$153
CheaperTypical $252Pricier

Cheaper than almost all homes nearby

Living area3,171 ft²
SmallerTypical 1,388 ft²Bigger

Bigger than 97% of homes nearby

Lot size0.29 ac
SmallerTypical 0.25 acBigger

Bigger than 56% of homes nearby

Year built1907
OlderTypical 1959Newer

Newer than 17% of homes nearby

How 328 Olivia St ranks against every home in each area.
MeasureThis homeDerby 06418Naugatuck Valley County
Estimated valuepricier than$485,67690% of homes69% of homes
Price per ft²pricier than$153almost no homes3% of homes
Living areabigger than3,171 ft²97% of homes94% of homes
Lot sizebigger than0.29 ac56% of homes37% of homes
Year builtnewer than190717% of homes7% of homes

About 328 Olivia St

How much is 328 Olivia St, Derby, CT worth?

The TopHap Estimate for 328 Olivia St, Derby, CT is $485,676 as of Sep 24, 2026. The likely range is $440,615 to $530,737. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 328 Olivia St, Derby, CT last sell?

328 Olivia St, Derby, CT last sold on Jul 14, 1998 for $33,000, according to the county's recorded deed.

How big is 328 Olivia St, Derby, CT?

328 Olivia St, Derby, CT has 3 bedrooms, 2 bathrooms, 3,171 square feet of living space and a 0.29-acre lot.

When was 328 Olivia St, Derby, CT built?

328 Olivia St, Derby, CT was built in 1907, making it 119 years old. The building has 2 stories.

What schools serve 328 Olivia St, Derby, CT?

328 Olivia St, Derby, CT is assigned to Irving School (elementary), rated D; Derby High School (high), rated F; Derby Middle School (middle), rated C. All sit in Derby School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 328 Olivia St, Derby, CT compare to other homes in Derby 06418?

Among the 3,850 homes in Derby 06418, it is worth more than 90% of them ($485,676 against a typical $344,968), its price per square foot is higher than almost none of them ($153 against a typical $252), it is bigger than 97% of them (3,171 ft² against a typical 1,388 ft²), its lot is bigger than 56% of them (0.29 ac against a typical 0.25 ac) and it is newer than 17% of them (1907 against a typical 1959). Measured against all of Naugatuck Valley County, it is worth more than 69% 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 328 Olivia St, Derby, CT?

The 2025 property tax bill for 328 Olivia St, Derby, CT was $10,106. The county assessed it at $233,940.

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