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Single Family ResidenceResidential
$1,261,073$404 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $525,000 on Jun 30, 2010

4255 ROXBURY ST

SIMI VALLEY, CA 93063
5
Beds
3
Baths
3,125 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.
0.28 ac
Lot SizeThe size of the land the home sits on, from county records.
1979
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.3M
$1.2M low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$525,000 · Jun 30, 2010

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,299 (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.$691,219 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$345,612
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$345,607
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$677,666

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.49
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
82
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
47
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
33
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
85
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
CountyVENTURA
Lot (acres)The size of the land the home sits on, from county records.0.28
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 42 ft²

Transaction History(5)

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

Foreclosure Filings(1)

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

M
Valley View Middle SchoolC-
Middle · Grades 6–8 · 0.3 mi
E
Township Elementary SchoolB+
Elementary · Grades KG–6 · 0.4 mi
H
Simi Valley High SchoolB
High · Grades 9–12 · 2.2 mi

District: Simi Valley Unified School District

Neighborhood · ZIP 93063These 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.72
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.114
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.580

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.98%
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.6.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.54,519
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,079 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$111,983
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$147,478
Average tempThe average temperature here across a full year.63°F
Annual precipHow much rain and melted snow falls here in a typical year.18 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.73%

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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

4255 Roxbury 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 94% of homes in Simi Valley 93063
  • Costs less per square foot than 88% of homes in Simi Valley 93063
  • Bigger than 95% of homes in Simi Valley 93063
  • Has a bigger lot than 86% of homes in Simi Valley 93063

What homes are worth in Simi Valley 93063

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

This home
$437K$1.5M

This home is worth more than 94% of homes in Simi Valley 93063.

How it measures up in Simi Valley 93063

The dot is this home. The mark in the middle is the typical home in Simi Valley 93063.

Estimated value$1,261,073
CheaperTypical $838,794Pricier

Pricier than 94% of homes nearby

Price per ft²$404
CheaperTypical $484Pricier

Pricier than 12% of homes nearby

Living area3,125 ft²
SmallerTypical 1,698 ft²Bigger

Bigger than 95% of homes nearby

Lot size0.28 ac
SmallerTypical 0.17 acBigger

Bigger than 86% of homes nearby

Year built1979
OlderTypical 1976Newer

Newer than 61% of homes nearby

How 4255 Roxbury St ranks against every home in each area.
MeasureThis homeSimi Valley 93063Ventura County
Estimated valuepricier than$1,261,07394% of homes82% of homes
Price per ft²pricier than$40412% of homes13% of homes
Living areabigger than3,125 ft²95% of homes92% of homes
Lot sizebigger than0.28 ac86% of homes79% of homes
Year builtnewer than197961% of homes58% of homes

About 4255 Roxbury St

How much is 4255 Roxbury St, Simi Valley, CA worth?

The TopHap Estimate for 4255 Roxbury St, Simi Valley, CA is $1,261,073 as of Jul 14, 2026. The likely range is $1,205,310 to $1,316,836. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4255 Roxbury St, Simi Valley, CA last sell?

4255 Roxbury St, Simi Valley, CA last sold on Jun 30, 2010 for $525,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4255 Roxbury St, Simi Valley, CA?

4255 Roxbury St, Simi Valley, CA has 5 bedrooms, 3 bathrooms, 3,125 square feet of living space and a 0.28-acre lot.

When was 4255 Roxbury St, Simi Valley, CA built?

4255 Roxbury St, Simi Valley, CA was built in 1979, making it 47 years old. The building has 1 story.

What schools serve 4255 Roxbury St, Simi Valley, CA?

4255 Roxbury St, Simi Valley, CA is assigned to Valley View Middle School (middle), rated C-; Township Elementary School (elementary), rated B+; Simi Valley High School (high), rated B. All sit in Simi Valley Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4255 Roxbury St, Simi Valley, CA compare to other homes in Simi Valley 93063?

Among the 17,119 homes in Simi Valley 93063, it is worth more than 94% of them ($1,261,073 against a typical $838,794), its price per square foot is higher than 12% of them ($404 against a typical $484), it is bigger than 95% of them (3,125 ft² against a typical 1,698 ft²), its lot is bigger than 86% of them (0.28 ac against a typical 0.17 ac) and it is newer than 61% of them (1979 against a typical 1976). Measured against all of Ventura County, it is worth more than 82% 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 4255 Roxbury St, Simi Valley, CA?

The 2025 property tax bill for 4255 Roxbury St, Simi Valley, CA was $8,299. The county assessed it at $691,219.

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