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Single Family ResidenceResidential
$815,094$508 / 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 86How 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

4066 BIG RANCH RD

NAPA, CA 94558
3
Beds
1.5
Baths
1,605 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.
1 ac
Lot SizeThe size of the land the home sits on, from county records.
1956
Year BuiltThe year the home was originally built, according to county records.
6
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

$815K
$703K low$927K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,476 (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.$221,048 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$38,234
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$182,814
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$216,715
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$221,048

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.36
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
54
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.
51
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
CountyNAPA
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning 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.Yes

Transaction History(4)

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 SchoolB-
Elementary · Grades KG–5 · 1.1 mi
H
Vintage High SchoolC
High · Grades 9–12 · 1.2 mi
M
Redwood Middle SchoolC
Middle · Grades 6–8 · 2.0 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%

Owner Tools

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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

4066 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.

  • Has a bigger lot than 86% of homes in Napa County
  • Older than 77% 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
$427K$3.5M

This home is worth more than 46% of 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$815,094
CheaperTypical $853,388Pricier

Pricier than 46% of homes nearby

Price per ft²$508
CheaperTypical $529Pricier

Pricier than 41% of homes nearby

Living area1,605 ft²
SmallerTypical 1,659 ft²Bigger

Bigger than 47% of homes nearby

Lot size1 ac
SmallerTypical 0.18 acBigger

Bigger than 85% of homes nearby

Year built1956
OlderTypical 1972Newer

Newer than 23% of homes nearby

How 4066 Big Ranch Rd ranks against every home in each area.
MeasureThis homeNapa 94558Napa County
Estimated valuepricier than$815,09446% of homes48% of homes
Price per ft²pricier than$50841% of homes42% of homes
Living areabigger than1,605 ft²47% of homes47% of homes
Lot sizebigger than1 ac85% of homes86% of homes
Year builtnewer than195623% of homes28% of homes

About 4066 Big Ranch Rd

How much is 4066 Big Ranch Rd, Napa, CA worth?

The TopHap Estimate for 4066 Big Ranch Rd, Napa, CA is $815,094 as of Sep 24, 2026. The likely range is $703,268 to $926,920. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4066 Big Ranch Rd, Napa, CA last sell?

4066 Big Ranch Rd, Napa, CA last sold on Feb 28, 2018, according to the county's recorded deed.

How big is 4066 Big Ranch Rd, Napa, CA?

4066 Big Ranch Rd, Napa, CA has 3 bedrooms, 1.5 bathrooms and 1,605 square feet of living space.

When was 4066 Big Ranch Rd, Napa, CA built?

4066 Big Ranch Rd, Napa, CA was built in 1956, making it 70 years old.

What schools serve 4066 Big Ranch Rd, Napa, CA?

4066 Big Ranch Rd, Napa, CA is assigned to Willow Elementary Magnet School (elementary), rated B-; Vintage High School (high), rated C; 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 4066 Big Ranch Rd, Napa, CA compare to other homes in Napa 94558?

Among the 20,709 homes in Napa 94558, it is worth more than 46% of them ($815,094 against a typical $853,388), its price per square foot is higher than 41% of them ($508 against a typical $529), it is bigger than 47% of them (1,605 ft² against a typical 1,659 ft²), its lot is bigger than 85% of them (1 ac against a typical 0.18 ac) and it is newer than 23% of them (1956 against a typical 1972). Measured against all of Napa County, it is worth more than 48% 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 4066 Big Ranch Rd, Napa, CA?

The 2026 property tax bill for 4066 Big Ranch Rd, Napa, CA was $2,476. The county assessed it at $221,048.

More homes on Big Ranch Rd

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Assigned schools

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