Skip to content
Skip to content
TopHapOpen in map
Rural ResidenceResidential
$3,561,870$1,699 / 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

4036 BIG RANCH RD

NAPA, CA 94558
4
Beds
3
Baths
2,096 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.
10.84 ac
Lot SizeThe size of the land the home sits on, from county records.
1932
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

$3.6M
$3.3M low$3.9M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$68,413 (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.$6,082,681 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,583,094
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$4,499,587
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$6,082,681

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.
57
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.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.1 in
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.0.2 percent flood zone

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
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1938
Lot (acres)The size of the land the home sits on, from county records.10.84
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.None
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(12)

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 · 1.1 mi
H
Vintage High SchoolB
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

Do you own this home?
Claim this home

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

4036 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.

  • Worth more than 97% of homes in Napa 94558
  • Costs more per square foot than 98% of homes in Napa 94558
  • Bigger than 71% of homes in Napa 94558
  • Has a bigger lot than 97% of homes in Napa 94558
  • Older than 97% 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 97% 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$3,561,870
CheaperTypical $860,853Pricier

Pricier than 97% of homes nearby

Price per ft²$1699
CheaperTypical $532Pricier

Pricier than 98% of homes nearby

Living area2,096 ft²
SmallerTypical 1,656 ft²Bigger

Bigger than 71% of homes nearby

Lot size10.84 ac
SmallerTypical 0.18 acBigger

Bigger than 97% of homes nearby

Year built1932
OlderTypical 1972Newer

Newer than 3% of homes nearby

How 4036 Big Ranch Rd ranks against every home in each area.
MeasureThis homeNapa 94558Napa County
Estimated valuepricier than$3,561,87097% of homes97% of homes
Price per ft²pricier than$169998% of homes98% of homes
Living areabigger than2,096 ft²71% of homes70% of homes
Lot sizebigger than10.84 ac97% of homes96% of homes
Year builtnewer than19323% of homes7% of homes

About 4036 Big Ranch Rd

How much is 4036 Big Ranch Rd, Napa, CA worth?

The TopHap Estimate for 4036 Big Ranch Rd, Napa, CA is $3,561,870 as of Sep 24, 2026. The likely range is $3,252,383 to $3,871,357. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4036 Big Ranch Rd, Napa, CA last sell?

4036 Big Ranch Rd, Napa, CA last sold on Nov 23, 2004, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 4036 Big Ranch Rd, Napa, CA?

4036 Big Ranch Rd, Napa, CA has 4 bedrooms, 3 bathrooms, 2,096 square feet of living space and a 10.84-acre lot.

When was 4036 Big Ranch Rd, Napa, CA built?

4036 Big Ranch Rd, Napa, CA was built in 1932, making it 94 years old.

What schools serve 4036 Big Ranch Rd, Napa, CA?

4036 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 4036 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 97% of them ($3,561,870 against a typical $860,853), its price per square foot is higher than 98% of them ($1699 against a typical $532), it is bigger than 71% of them (2,096 ft² against a typical 1,656 ft²), its lot is bigger than 97% of them (10.84 ac against a typical 0.18 ac) and it is newer than 3% of them (1932 against a typical 1972). Measured against all of Napa County, it is worth more than 97% 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 4036 Big Ranch Rd, Napa, CA?

The 2025 property tax bill for 4036 Big Ranch Rd, Napa, CA was $68,413. The county assessed it at $6,082,681.

More homes on Big Ranch Rd

Closest homes

More homes in Napa 94558

Assigned schools

Explore the area

See this home in context

Open 4036 Big Ranch Rd on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map