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Rural ResidenceResidential
$9,999,999$2,418 / 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 55How 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 $1,000,000 on Jul 23, 2009

4245 BIG RANCH RD

NAPA, CA 94558
3
Beds
4 / 1
Baths
4,136 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.
21.09 ac
Lot SizeThe size of the land the home sits on, from county records.
2000
Year BuiltThe year the home was originally built, according to county records.
2
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.
4
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$10M
$6.3M low$10M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,000,000 · Jul 23, 2009

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$50,050 (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.$4,450,119 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,018,892
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,431,227
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$4,450,119

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.28
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
38
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
67
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.Rural Residence
CountyNapa
Lot (acres)The size of the land the home sits on, from county records.21.09
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.None
FireplaceWhether the home has a fireplace, and what kind.Yes
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
Willow Elementary Magnet SchoolC
Elementary · Grades KG–5 · 1.3 mi
H
Vintage High SchoolB
High · Grades 9–12 · 1.7 mi
M
Redwood Middle SchoolC
Middle · Grades 6–8 · 2.3 mi

District: Napa Valley Unified School District

Neighborhood · ZIP 94558These 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.92
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.91
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.401

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.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.1%
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.67,018
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.155 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$105,998
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$137,362
Average tempThe average temperature here across a full year.59°F
Annual precipHow much rain and melted snow falls here in a typical year.30 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

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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

4245 Big Ranch 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.

  • Among the most valuable homes in Napa 94558
  • Among the highest price per square foot in Napa 94558
  • Bigger than 98% of homes in Napa County
  • Has a bigger lot than 98% of homes in Napa 94558
  • Newer than 90% of homes in Napa 94558

What homes are worth in Napa 94558

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

This home
$421K$3.9M

This home is worth more than almost all homes in Napa 94558.

How it measures up in Napa 94558

The dot is this home. The mark in the middle is the typical home in Napa 94558.

Estimated value$9,999,999
CheaperTypical $860,853Pricier

Pricier than almost all homes nearby

Price per ft²$2418
CheaperTypical $532Pricier

Pricier than almost all homes nearby

Living area4,136 ft²
SmallerTypical 1,656 ft²Bigger

Bigger than 97% of homes nearby

Lot size21.09 ac
SmallerTypical 0.18 acBigger

Bigger than 98% of homes nearby

Year built2000
OlderTypical 1972Newer

Newer than 90% of homes nearby

How 4245 Big Ranch Rd ranks against every home in each area.
MeasureThis homeNapa 94558Napa County
Estimated valuepricier than$9,999,999almost all homesalmost all homes
Price per ft²pricier than$2418almost all homesalmost all homes
Living areabigger than4,136 ft²97% of homes98% of homes
Lot sizebigger than21.09 ac98% of homes98% of homes
Year builtnewer than200090% of homes84% of homes

About 4245 Big Ranch Rd

How much is 4245 Big Ranch Rd, Napa, CA worth?

The TopHap Estimate for 4245 Big Ranch Rd, Napa, CA is $9,999,999 as of Sep 24, 2026. The likely range is $6,287,509 to $9,999,999. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4245 Big Ranch Rd, Napa, CA last sell?

4245 Big Ranch Rd, Napa, CA last sold on Jul 23, 2009 for $1,000,000, according to the county's recorded deed.

How big is 4245 Big Ranch Rd, Napa, CA?

4245 Big Ranch Rd, Napa, CA has 3 bedrooms, 4 bathrooms, 4,136 square feet of living space and a 21.09-acre lot.

When was 4245 Big Ranch Rd, Napa, CA built?

4245 Big Ranch Rd, Napa, CA was built in 2000, making it 26 years old. The building has 2 stories.

What schools serve 4245 Big Ranch Rd, Napa, CA?

4245 Big Ranch Rd, Napa, CA is assigned to Willow Elementary Magnet School (elementary), rated C; Vintage High School (high), rated B; Redwood Middle School (middle), rated C. All sit in Napa Valley Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4245 Big Ranch Rd, Napa, CA compare to other homes in Napa 94558?

Among the 20,955 homes in Napa 94558, it is worth more than almost all of them ($9,999,999 against a typical $860,853), its price per square foot is higher than almost all of them ($2418 against a typical $532), it is bigger than 97% of them (4,136 ft² against a typical 1,656 ft²), its lot is bigger than 98% of them (21.09 ac against a typical 0.18 ac) and it is newer than 90% of them (2000 against a typical 1972). Measured against all of Napa County, it is worth more than almost all 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 4245 Big Ranch Rd, Napa, CA?

The 2025 property tax bill for 4245 Big Ranch Rd, Napa, CA was $50,050. The county assessed it at $4,450,119.

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